US20110125054A1 - Device, system and method for multiple core biopsy - Google Patents
Device, system and method for multiple core biopsy Download PDFInfo
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- A61B10/02—Instruments for taking cell samples or for biopsy
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- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/06—Biopsy forceps, e.g. with cup-shaped jaws
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Abstract
A core biopsy device having a forward-facing cutting edge with either single or dual counter rotating blades is configured to acquire multiple biopsy specimens and temporarily store them within a specimen chamber located beneath the cutting edge. The core biopsy device is insertable and removable from a biopsy channel of an endoscope. The core biopsy device includes an endoscopically visible ruler with depth gauge increments. Other embodiments include deployable depth stops to restrain the plunging of the specimen chamber to not exceed distances preset or selected by the user. Multiple samples contained within the specimen chamber are removed via flushing from a syringe adapter when the device is removed from the endoscope. Alternatively the multiple specimens are removed under applied suction to an external chamber located outside the patient. The order and orientation of the removed specimens are preserved.
Description
- This application claims the benefit of priority to and incorporates by reference in its entirety U.S. Provisional Patent Application Ser. No. 61/264,628 filed Nov. 25, 2009.
- An embodiment of the invention relates generally to biopsy devices used in endoscopic and other tissue sampling procedures.
- The traditional biopsy forceps used today typically gather just one biopsy specimen at a time. The forceps must be removed from the scope each time to retrieve the single specimen. This is a tedious and time consuming process for standard tissue sampling and even more so for surveillance biopsies where in excess of 50 specimens may be taken. A large variety of endoscopic biopsy forceps are commercially available today with the majority of the market converting to disposable forceps over the last 15 years. The current design has not fundamentally changed since its inception over 30 years ago. Whether disposable or reusable the forceps operate and function in a similar manner. The variety of biopsies forceps differ in size of the biopsy cup, the shape of the cup (oval vs. alligator), fenestrated or non-fenestrated (cup with small opening) and presence or absence of a needle. To operate the traditional double cupped biopsy forceps the cups are closed and advanced through the endoscope's instrument channel. Under direct endoscopic visualization, the forceps are opened and further advanced into a selection of mucosa area for sampling. Pressing the open forceps onto the mucosa to obtain a specific depth. The forceps are then closed to pinch and bite off or tear away forcibly (avulsed) a mucosal sample. The sample held in the jaw of the forceps is then retrieved by removing the biopsy forceps from the endoscope. With the aid of an assistant the specimen sample is removed from the jaws and placed into a vial. The process is then repeated for the subsequent samples. The traditional biopsy forceps design creates some of the complications experienced today but is accepted as the standard as there is no better alternative available.
- Further detail of the traditional biopsy forceps function and its shortcomings is as follows: After insertion and the jaws open (spanning tip to tip 7-12 mm), the physician will push the open jaws against the mucosal wall with enough pressure he feels is necessary to achieve the desired depth of sample (with varying degrees of consistency and success). The jaws are then closed to bite and secure that sample and the forceps are tugged or pulled away to tear away forcibly (avulsed) a mucosal tissue sample. However when this is accomplished much of the specimen is crushed along the outer edges. The quality of a specimen sample is judged by the following parameters: weight (mg), size (mm3), depth, crush artifact, sheering effect (artificial distortion of the epithelium) and adequacy of the specimens for histological information. They can be categorized as inadequate, suboptimal, and adequate. As much as 50% of the specimens are suboptimal or inadequate showing crush artifact or they are superficial so that histopathological assessment is unattainable. As long as more than 50% of the tissue area is not crushed it should allow adequate (not optimal) assessment of the histopathological features of the specimen. If the depth of the tissue was less than the full mucosal thickness and/or the mucosal area was less than 5 mm2 then histopathological assessment is compromised.
- The traditional biopsy forceps compel gastroenterologist to take bigger samples to compensate for its functional design limitations. This has lead to introduction of larger jawed jumbo forceps spanning tip to tip up to 12 mm. The jumbo forceps' bigger sample provides more for the pathologist to work with. The presumption is the larger samples will allow for proper histological diagnosis with at least a certain number of the tissue specimens. Unfortunately even with these larger cups a great percentage is not adequate due to shearing or crush artifact. These inadequate samples have held the key to a more accurate diagnosis but due to their condition were not salvageable.
- As an attempt to streamline the biopsy procedure one manufacture claims to have a biopsy forceps device that can take up to two tissue specimens in a single pass. The forceps are sold at a premium price as the market recognizes the value getting multiple tissue samples in one pass, saving time. Research indicates this product has not been very successful. Its design actually limits the size of tissue sample and causes additional crushing which both reduce the quality for pathology. The conclusion is that physicians are not willing to give up quality of pathology to save time.
- For decades little has changed with the collection of endoscopic biopsy tissue specimens. Once a tissue sample is taken the endoscopic biopsy forceps are withdrawn from the biopsy channel of the endoscope very carefully by the nurse or GI technician. Colon forceps are 230 cm in length and upper forceps are 160 cm in length. Both are only 2.3 mm in diameter so much care is taken not to fling patient fluids as they are removed from the endoscope. Once the forceps are out of the endoscope the GI assistant maintains control of the distal end and carefully opens the cups exposing the tissue specimen. At this point the forceps are either dipped into a specimen vial filled with fixative and shaken to dislodge the specimen from the cups of the forceps or the GI assistant uses a needle and carefully picks the tissue out of the open cups and places the tissue into the specimen vial. On occasion the GI assistant may orient the tissue specimen onto a piece of gauze in order to help facilitate the laboratory processing. This is a very tedious, time consuming process with plenty of opportunity to further damage the specimen. The forceps are then closed and passed down the biopsy channel to the site where another biopsy is taken and the process is repeated again and again until a sufficient number of samples are taken from this particular area in question.
- Preferred and alternative examples of the present invention are described in detail below with reference to the following drawings depicted in
FIGS. 1-37 : -
FIG. 1 schematically depicts a multiplecore biopsy device 10 deployable from the biopsy channel of a flexible endoscope; having a single rotating blade affixed to the tissue contact end of aspecimen chamber 16 to obtain hemispherically cut specimens using a multifunctionbiopsy device handle 50; -
FIG. 2 schematically depicts a perspective view of the multi-functionbiopsy device handle 50; -
FIG. 3 schematically depicts a cross-sectional view of aproximal specimen chamber 80 connectable with themulti-function handle 50; -
FIG. 4 schematically depicts a multiple corebiopsy device system 100 deployable via the channel of a flexible endoscope; -
FIG. 5 schematically depicts a percutaneious multiplecore biopsy device 200; -
FIG. 6 schematically depicts a percutaneious multiplecore biopsy system 300; -
FIG. 7 schematically depicts the operation of the multiplecore biopsy device 10 in a lower intestinal endoscopic procedure; -
FIGS. 8A-8F depict movement operations of the multifunctionbiopsy device handle 50 to deploy advancement and cutting actions of thespecimen chamber 16; -
FIG. 9 depicts side top, and perspective views of the components of the multifunction biopsy device handle to effect the movement actions to deploy and/or implement cutting actions of thespecimen chamber 16; -
FIG. 10 schematically depicts the deployment of the multiplecore biopsy device 10 from the biopsy channel of a flexible endoscope to obtain multiple tissue core specimens withinanatomical region 2 depicted inFIG. 7 ; -
FIGS. 11A-11C depict deployment of the multiplecore biopsy device 10specimen chamber 16 and depth stops 18 fromsheath 14; -
FIGS. 12A-12D schematically depict the plunging deployment of the multiple core biopsydevice specimen chamber 16 to the tissue depth defined by the depth stops 18 and subsequent cutting action of thesingle edge blade 20 withintissue 19; -
FIGS. 13A-13C schematically depict structure and deployment operations of the perpendicular single blade singleaxis specimen chamber 116; -
FIGS. 14A-14C schematically depict structure and deployment operations of the angled single blade singleaxis specimen chamber 120; -
FIGS. 15A-15C schematically depict structure and deployment operations of the perpendicular double blade singleaxis specimen chamber 124; -
FIGS. 16A-16C schematically depict structure and deployment operations of the perpendicular double blade doubleaxis specimen chamber 128; -
FIGS. 17A-17E schematically depict structure and deployment operations of the angled double blade singleaxis specimen chamber 132; -
FIGS. 18A-18C schematically depict structure and deployment operations of the angled double blade doubleaxis specimen chamber 136; -
FIGS. 19A-19D schematically depict alternative embodiments of depth stop wire configurations deployed from thesheath 14 housing the perpendicular single blade singleaxis specimen chamber 16; -
FIGS. 20A-20B schematically depict structure and deployment operations of the angled double cantilevered blade singleaxis specimen chamber 140; -
FIGS. 21A-21G schematically depict structure and deployment operations of the perpendicular double cantilevered blade singleaxis specimen chamber 160; -
FIG. 22 schematically depicts structure and deployment operations of the angled single blade singleaxis specimen chamber 120 withwire deflection cap 165; -
FIGS. 23A-23C schematically depicts alternate configurations of blade cutting surfaces; -
FIGS. 24A-24E schematically depicts structure and deployment operations of a rotary cuttingspecimen chamber 190; -
FIGS. 25A-25F schematically depict structure and deployment operations of the perpendicular double cantilevered blade singleaxis specimen chamber 188 with four depth stops 18; -
FIG. 26 presents a perspective view of thespecimen chamber 16 in relation to thesheath 14; -
FIG. 27 presents an alternate embodiment depiction of theMCB device 10 depicted inFIG. 1 ; -
FIG. 28 presents a side view depiction of an alternate embodiment to the multifunction biopsy device handle 50 depicted inFIG. 2 ; -
FIG. 29 presents another depiction of thedepth stop 18 deployment from theMCB device 10 described inFIG. 11B ; -
FIG. 30 presents another depiction of the setting of the specimen chamber's 16 plunging distance and advancement to that plunging distance from theMCB device 10 described inFIG. 12B ; -
FIG. 31 presents another depiction of the deployment of the depth stops 18 from theMCB 10 described inFIG. 11B ; -
FIG. 32 presents another depiction of the cutting action by theblade 20 fromspecimen chamber 16 and storage of multiple tissue sections stored within thespecimen chamber 16 from theMCB device 10 described inFIG. 12D ; -
FIG. 33 presents an alternate cross-sectional and perspective views depictingspecimen chamber 188 deployment and blade operation shown inFIGS. 25A-F above; -
FIG. 34 presents additional cross-sectional and perspectiveviews specimen chamber 188 deployment and blade operation depicted inFIGS. 25A-F above; -
FIG. 35 presents another side view and perspective depiction of the rigid multi-corespecimen biopsy device 200 depicted inFIG. 5 above; -
FIG. 36 schematically depicts side and cross-sectional views of another depiction ofproximal specimen chamber 80 connectable with themulti-function handle 50 for specimen retrieval via aspiration from the distal chamber into the proximal chamber with preservation of sampling order and specimen orientation; and -
FIG. 37 schematically depicts side and cross-sectional views of retrieval of the multiple specimens from the distal chamber via fluid flushing fromsyringe 355 connected to thebiopsy access port 68 into a net 360 with preservation of sampling order and specimen orientation. - A Multiple Core Biopsy (MCB) device with a substantially cylindrically-shaped core and a sharp forward-facing cutting edge is configured to acquire multiple tissue biopsy samples during a single endoscopic procedure. The tissue biopsy sections are either temporarily stored within the specimen chamber, or aspirated through the device into a specimen management system maintaining sampling order and specimen orientation. If they are temporarily stored in the specimen chamber the specimens are removed by expelling into a specimen management system after the MCB is removed for the scope. Expulsion is achieved by a reverse fluid flush in communication with the specimen chamber with preservation of the specimen's order and orientation into a specimen management system. Once the samples are contained in the specimen management system it is removed and labeled for processing. With the specimen chamber cleared the MCB is ready for alternate site sampling. The MCB device specimen chamber may be configured to have a forward-facing cutting edge fitted with a single pivotable arced cutting blade rotating about an axis or, alternatively, two counter rotating and opposing arced cutting blades. The sharpness of the forward-facing cutting edge enables acquisition of high quality specimens, substantially free of crush defects.
- Other embodiments include a stylet that aids the MCB device to penetrate targeted biopsy sites for single or multiple core specimens taken and retrieved in a similar manner.
- Further disclosed are particular embodiments concerning a core biopsy device having a forward-facing cutting edge with either single or dual counter rotating blades is configured to acquire multiple biopsy specimens and temporarily store them within a specimen chamber located beneath the cutting edge. The core biopsy device is insertable and removable from a biopsy channel of an endoscope. The core biopsy device includes an endoscopically visible ruler with depth gauge increments. Other embodiments include deployable depth stops to restrain the plunging of the specimen chamber to not exceed a set distance. Multiple samples contained within the specimen chamber are removed via flushing from a syringe adapter when the device is removed from the endoscope. Alternatively the multiple specimens are removed under applied suction to an external specimen management chamber attached to the proximal end of the biopsy access port [without removing the MCB device from the scope]. Either way the order and orientation of the removed specimens are preserved.
- Yet further described herein are substantially cylindrically-shaped multiple core biopsy device having a specimen chamber located within a flexible sheath traversing through the biopsy channel of an endoscope. The specimen chamber is equipped with forward-facing cutting edges and is operable by a multifunction handle manipulated by a user at the proximal end. The multiple core biopsy device includes a distally located specimen chamber with forward facing cutting edges intended for placement in the lumen of an esophagus, internally within the stomach, or internally within the upper and lower gastrointestinal system of a patent. The cutting edges of the specimen chamber are so configured to acquire multiple tissue biopsy samples with preservation of tissue integrity, orientation, and sequence order acquired in a single-pass during an endoscopic procedure. The configuration of the cutting blade or blades avoids tissue crushing and provides for clearly delineated samples for temporary storage in a specimen chamber during the endoscopic procedure. In other embodiments the shapes of the multiple core biopsy device may have shapes other than circular. For example, the shapes be include oval, rectangular, square, or triangular configurations.
- In alternate embodiments the multiple core biopsy device may be fitted with a specimen management system that utilizes a suction assisted collection chamber attached to the biopsy access port. Samples temporally stored in the distally located specimen chamber located internally in-situ within the patient may be removed from the specimen chamber by gentle suction and transferred to the external specimen management system with preservation of tissue sample orientation, and acquisition order. This patient specimen management system provides for continued sample collection to resume at different anatomical sites without removing the MCB device from the endoscope.
- The multiple tissue biopsy sections are stored within the specimen chamber or specimen cavity, or alternatively, aspirated through the device and into a specimen management system chamber located at the proximal end of the biopsy device during endoscopic examination and sampling. After biopsy sampling is finished for a specific area in question and the specimens are stored within the specimen chamber the biopsy device is removed from the scope and the specimens are removed by expelling into a specimen management system with a fluid flush using a syringe in fluid communication with the specimen chamber with preservation of the specimen's order and orientation.
- The core biopsy device may be fitted with either the specimen chamber configured to have a forward-facing single pivotable arced cutting blade rotating about an axis or, alternatively, two counter rotating and opposing cutting blades. The multiple specimens obtained from either the single rotating blade or the two opposing blades are of high quality tissue biopsy sections that are substantially free of crush defects.
- In general the specification describes below a core biopsy device having a forward-facing cutting edge with either single or dual counter rotating blades is configured to acquire multiple biopsy specimens and temporarily store them within a specimen chamber located beneath the cutting edge. The core biopsy device is insertable and removable from a biopsy channel of an endoscope. The core biopsy device includes an endoscopically visible ruler with depth gauge increments. Other embodiments include deployable depth stops. A user plunges the biopsy device to a selected tissue depth, by selecting variable ruler increments. Biopsied tissue is then excised in sizes defined by the travel path of the single blade or dual cutting blades and plunged distances, and contained within the specimen chamber. Multiple samples contained within a specimen chamber are removed via flushing from a syringe adapter when the device is removed from the patient. The order and orientation of the removed specimens are preserved.
- The core biopsy device described herein is configured to acquire at least one tissue biopsy sample within a tubular-shaped cavity or specimen chamber. The core biopsy device is insertable and removable from a biopsy channel of an endoscope and includes a single rotating cutting blade or dual counter rotating cutting blades at the tissue contact end of a tube having a cavity. The core biopsy device includes an endoscopically visible ruler with depth gauge increments and include deployable depth stops. A user plunges the biopsy devices to a selected tissue depth. Biopsied tissue is then excised in sizes defined by the travel path of the single blade or dual cutting blades and plunged distances, and contained within a specimen chamber. Samples contained within a specimen chamber during a single endoscopic procedure are removable via flushing from a syringe adapter such that the biopsied tissue specimens are flushed from the forward facing cutting edges keeping the specimens in order and orientation.
- Also described below includes a core biopsy device configured to acquire at least one tissue biopsy sample within a tubular cavity is described. The core biopsy device is insertable and removable from a biopsy channel of an endoscope and includes an outer protective sheath a single rotating cutting blade or dual counter rotating cutting blades at the tissue contact end of the inner core tube having a cavity. The core biopsy device include an endoscopically visible ruler with depth gauge increments. Other embodiments include deployable depth stops. A user plunges the biopsy devices to a selected tissue depth. Biopsied tissue is then excised in sizes defined by the travel path of the single blade or dual cutting blades and plunged distances, and propelled into the tube cavity as a consequence of applied cutting, tissue plunging forces and potentially controlled aspiration. Biopsy procedures are repeated as desired and sequential and multiple tissue sections are propelled into the cavity to displace the previous biopsy section deeper into the tubular cavity. Other descriptions include a multiple core biopsy system utilizes a flushing syringe to expel and remove multiple biopsy sections in reverse order to their endoscopic sampling while at the same time maintaining order and orientation.
- The multiple core biopsy device is insertable and removable through the biopsy channel of an endoscope. Particular embodiments of the core biopsy device includes a single rotating cutting blade or dual counter rotating cutting blades at the tissue contact end of tubular chamber that houses the biopsy specimens during an endoscopic procedure. The core biopsy device includes an endoscopically visible ruler with depth gauge increments that is on the exterior side of the specimen chamber. Other embodiments include deployable tissue plunger stops. A user plunges the biopsy devices to a selected tissue depth. Biopsied tissue is then excised in sizes defined by the travel path of the single blade or dual cutting blades and plunged distances, and propelled into the tube cavity as a consequence of applied cutting and tissue plunging forces. Biopsy procedures are repeated as desired and sequential and multiple tissue sections are propelled into the cavity to displace the previous biopsy section deeper into the tubular cavity. Other descriptions include a multiple core biopsy system utilizes a flushing syringe to expel and remove multiple biopsy sections in reverse order to their endoscopic sampling while at the same time maintaining order and orientation. Another embodiment of the core biopsy device applies controlled suction to the proximal end of the device aspirating the individual tissue specimens into the Specimen Management System in order to their endoscopic sampling while at the same time maintaining order and orientation of subsequent samples.
- Illustrated below are embodiments for a single cutting blade and multiple cutting blade biopsy devices and describe systems and methods of procuring multiple biopsy tissue samples from a single endoscopic examination substantially devoid of crush artifacts. In general a core biopsy device operable by a user is described. In one embodiment, the core biopsy device includes a flexible tube having a tissue contact end (distal), a manipulation end controllable by the user (proximal), and a cavity located between the tissue contact and manipulation ends. At the tissue contact end resides a rotatable cutting blade. Connected between the rotatable cutting blade and the manipulation end is a blade control member. Biopsy tissue is obtained during endoscopic procedures when the user plunges the tissue contact end to a set depth, manipulates the blade control member from the manipulation end to pivot the rotatable cutting blade to excise a tissue section defined by the travel path of the rotatable cutting blade, and insert the tissue section into the cavity as a consequence of the cutting and plunging forces applied to the excised tissue. Other embodiments allow for the rotatable cutting blade to comprise two counter-rotating sections. Multiple biopsy samples may be acquired by repeating the plunging and cutting action by either the single rotating cutting blade or dual counter-rotating cutting blades wherein a sequential excised tissue sections are propelled into the cavity, thereby displacing the earlier sampled tissue section further into the cavity. A series of sequential biopsies may be thus acquired with minimum crush effect during a single pass of the biopsy device.
- In another embodiment, a multiple core biopsy (MCB) system is described. The multiple core biopsy system includes the biopsy device having a flushing port located near the manipulation end. The flushing port detachably receives a syringe having a flushing fluid. For sequential biopsies located in the cavity, either obtained by the single rotating cutting blade or the dual counter-rotating cutting blades biopsy devices, the multiple core biopsy device is removed from the endoscope, and receives a fluid flush delivered from the (proximal) manipulation end. The fluid flush thereby displaces the tissue section biopsies in reverse order to the order that they were sampled during the single pass of the biopsy device.
- In yet other embodiments described include a biopsy device having a removable stylet, the biopsy device being operable by a person who is using an image-guided system. The biopsy device includes a rigid sheath equipped with the removable stylet, the rigid sheath having depth markings visible by the image-guided system and a terminus with a distal chamber configured with a forward facing cutting edge comprising a fixed blade and at least one movable blade. The biopsy device further includes a manipulation end controllable by the user to plunge the forward facing cutting edge at a sampling locus after removal of the stylet at a depth selected by the user based on the depth markings and to engage a cutting action by the at least one movable blade at the depth selected to acquire at least one specimen storable in the distal chamber. The biopsy device may acquire additional depths obtained at deeper depths at the sampling locus. The rigid sheathed biopsy device may also be transferred to a different sampling locus to acquire additional specimens procured at increasing depths at that different sampling locus.
- Other embodiments of the multiple core sampling device provide for a flexible sheath having a distally located specimen chamber that is fitted with forward facing cutting surfaces, having a fixed and moveable portion that when the moveable portion is in the stowed position, is then configured for tissue plunging at controlled distances. To insure that unwanted tissue is not sampled while undergoing sheath insertion for placement at an anatomical region-of-interest for sought-after tissue sampling, the flexible sheath is also fitted with a stylet to prevent the unwanted entrance of tissues not desired for specimen sampling. Once the distal specimen chamber is positioned for multiple core biopsy sampling at the anatomical region-of-interest, the stylet is removed to allow specimen retrieval into the distal specimen chamber from multiple plunge-and-cut operations at pre-set or user-adjusted specimen chamber plunging depths. The cut operations occur after the plunging action to the pre-set or user-selected depths by the deployment of the moveable from its stowed position.
- Particular embodiments of the biopsy devices, systems, and methods encompass obtaining mucosal biopsies of the esophagus, stomach, small intestine, and large intestine. Endoscopic guided biopsies are the primary diagnostic approach to most GI disorders. Biopsy specimens obtained at endoscopy help not only to differentiate benign from malignant diseases, but also to establish the precise nature of the abnormality, be it infectious, inflammatory, or neoplastic.
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FIGS. 1-37 illustrate systems and devices for a MCB (multiple core biopsy) device that provides superior design and functionality to that of traditional biopsy forceps which rely on bigger specimens for quality samples. The MCB design provides for multiple specimens in a single pass, which speeds the procedure and reduces patient sedation time. Due to the cutting blade embodiment designs described, the MCB device virtually eliminates the crush factor inherent in the traditional biopsy forceps design. In all, a higher number of superior quality, consistent depth biopsy specimens are procured from the suspect area in the same time it takes to obtain a single traditional biopsy specimen. Generally an increased number of biopsy specimens correlates to a higher detection rate with improved outcomes. - The MCB device, which provides an advanced design and functionality, would soon expect to become the standard for taking diagnostic biopsies. This meshes well in a managed-care environment where everyone is being pressured to do more with less facilitating faster procedural turnaround time with improved outcomes.
- Further clinical advantages of the MCB include that specimens may be taken and kept in order and orientated, and have consistent depth via depth stops, set core advancement and blade swing as discussed below that provides or precise variable depth sampling. The MCB includes an internal reservoir channel allows for easy retrieval and transferring of multiple specimens and a single or dual-motion cutting mechanism smoothly severs the specimen at the prescribed depth virtually eliminating any crush artifact so that specimens may be obtained with minimal mucosa surface area disruption providing less bleeding. The MCB designs, as discussed below, provide for rapid target specimen selection aids in speeding of obtaining biopsy specimens in a single MCB insertion. The MCB includes a forward facing cylindrical cutting edge having a single arced cutting blade or dual opposing cutting blades. Aspiration may be controlled by a MCB user during tissue biopsies either right after the specimen is excised or right prior to or as the physician or other user is thrusting the device into the mucosal wall for a subsequent sample. Removal of the specimens from the MCB is accomplished by either removing the MCB from the scope and flushing specimens retrograde out the distal end or by aspiration through the entire length of MCB device into a specimen management system outside the body while the MCB device remains in the scope and patient. The specimen retrieval methods maintain or preserve the orientation and order of the tissue specimens.
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FIG. 1 schematically depicts a multiple core biopsy device 10 (MCB 10) deployable from the biopsy channel of a flexible endoscope. TheMCB 10 includes a singlerotating blade 20 affixed to the tissue contact end of aspecimen chamber 16 to obtain hemispherically cut specimens using a multifunction biopsy device handle 50. Thespecimen chamber 16 is accessed from the multifunction biopsy device handle 50 of theMCB 10 via thebiopsy access port 68 through the specimen channel which routes through to the distal tip. The specimen channel is a coaxial lumen that moves within the exterior cannula orsheath 14, that is flexible and engageable with the biopsy channel of an endoscope. The luer-lock allows a syringe (not shown) to be connected withbiopsy access port 68 to flush multiple core specimens from thespecimen chamber 16 after thecannula 14 is removed from the endoscope. Alternatively, thebiopsy access port 68 may be connected to a proximal specimen management system described inFIGS. 3 and 4 below. Thespecimen chamber 16 includesmultiple markings 17, each marking denoting a standard length. The size of the tissue cut is defined by the plunge distance and the hemispherical traveling distance defined by the singlerotatable blade 20. Deployment of depth stops 18 limit the plunge depth of the forward facing cutting edge of thespecimen chamber 16. - The cannula or
sheath 14 is passed through the biopsy channel of a flexible endoscope as shown inFIG. 7 below. Operation of themultifunction handle 50 to engage the depth stops 18, advance thespecimen chamber 16 and to activate cutting action by theblade 20 is described inFIGS. 8A-F below. Other specimen chambers, includingchambers FIGS. 8A-25D discussed and shown below, may be similarly fitted to thebiopsy device 10. Additional structural features of thespecimen chamber 16 in relation to thesheath 14 is illustrated and described inFIG. 26 below. - Cross-section along line A-A shows depth
stop control wires 35, and abladeblade control wire 37. The wires convey mechanical motion between the respective depth stops 18, and cuttingblade 20 at the distal end, and withmultifunction handle 50controls FIG. 2 below. -
FIG. 2 schematically depicts a perspective view of the multi-function biopsy device handle 50. Thehandle 50 includes a depthstop deployment control 54, a specimenchamber advancement control 61, and ablade activation control 66. The exemplary configuration shows that depthstop deployment control 54 having back-and-forth slidable motion along the long axis of thehandle 50, the specimenchamber advancement control 61 having clockwise and counterclockwise rotary motion perpendicular to the long axis, and theblade activation control 66 having back-and-forth slidable motion along the long axis. Other motion configurations of thecontrols specimen chamber 16, the depth stops 18, and the rotary cutting action of theblade 20. Theblade activation control 66 includes amotion limiter 58 that limits rotary cutting action to not exceed beyond that rotary motion needed to convey a complete cut of theblade 20 and a thumbhole 66 to ergonomically and conveniently be manipulated by the user or handle 50 operator. -
FIG. 3 schematically depicts a cross-sectional view of a proximalspecimen management system 80 connectable with the multi-function biopsy device handle 50 viabiopsy access port 68. Internalspecimen management chamber 84 is connectable with thebiopsy access port 68 and upon receiving suction conveyed viasuction channel 86, single or multiple samples temporarily housed in the distally locatedspecimen chamber 16 located internal within the patient are transferred to thespecimen management chamber 84. Transferred single or multiply acquired specimens are structurally preserved and in the order and orientation of the specimens taken. -
FIG. 4 schematically depicts a multiplecore biopsy system 100 (MCBS 100) deployable via the biopsy channel of a flexible endoscope shown inFIGS. 7 and 10 below. A suction source V is connectable with thesuction channel 86. Upon application of a suction, either as applied by a syringe (not shown), suction pump (not shown) or house suction source (not shown), any specimens temporarily housed within thespecimen chamber 16 are transferred to thespecimen management chamber 84 with maintenance of specimen integrity and sampling order and orientation. Other specimen chambers, including 116, 120, 124, 128, 132, 136, 140, 160, 188 and 190 (not shown) described inFIGS. 8A-25D discussed and shown below, may be similarly configured with theMCBS 100. -
FIG. 5 schematically depicts a percutaneous multiple core biopsy (PMCB)device 200. Used in conjunction with image-guided systems (not shown) such as ultrasound or X-ray visualization technologies, thePMCB 200 includes the proximally locatedmultifunctional handle 50 connected with a semi-rigid torigid shaft 214 to which may be fitted at its distal end thespecimen chambers 16. Other specimen chambers, including 116, 120, 124, 128, 132, 136, 140, 160, 188 and 190 (not shown) described inFIGS. 8A-25D discussed and shown below, may be similarly fitted to thePMCB device 200. Multiple specimen cores may be consecutively obtained within the same puncture locus of a targeted organ, say a lung, kidney or liver, to obtain structurally preserved, devoid of crush artifacts, and maintenance of specimen integrity and sampling order and orientation to allow meaningful histological examination.Incremental markings 17, having a known distance between each marking 17 of 1 or 2 mm, may be made with radio-opaque markings to be visible in X-ray guidance systems or other contrast agent media to make visible in ultrasound guidance systems. - Cross-section along line B-B shows the
blade wire 37 which conveys mechanical motion between theblade 20 ofspecimen chamber 16 at the distal end and withmultifunction handle 50blade control 56 discussed inFIG. 2 above. Thehandle 50 operator plunges thePMCB device 200 using themarkings distance 17. The operator engagesblade control 56 to acquire ablade 20 cut histological quality specimen and plunges deeper within the same organ puncture locus to acquire additional specimens similarly cut by theblade 20 viablade control 56. -
FIG. 6 schematically depicts a percutaneousmulti-core biopsy system 300. Connectable with theproximal specimen chamber 80 that is attachable to a suction source V, multiple samples obtained at a particular organ puncture location may be transferred under suction to the proximalspecimen management chamber 80 once removed the PMCB device is removed from the organ or patient. Under image guidance systems (not shown) or direct vision, thespecimen chambers 16, or alternatively,specimen chambers FIGS. 8A-25D below may proceed to another organ puncture locus to obtain a different set of multiple specimens for temporary storage within specimen chambers 16-190. Once removed from the patient, a gentle source of suction V, say via a syringe, pump, or room provided suction may be applied to transfer the different set of multiple specimens from distally specimen chambers 16-190 to proximally locatedspecimen management chamber 80. -
FIG. 7 schematically depicts the operation of the multiplecore biopsy device 10 in a large intestinal endoscopic procedure conducted by an operator.Endoscope 40 receives thesheath 14 ofMCB 10 orMCBS 100 throughendoscope 40biopsy port 42 and is passed through the biopsy channel located withinendoscope 40insertion tube 45. By way of example,insertion tube 45 is routed through the large gastrointestinal track's ascending, transverse, and descending branches. Respective cutaways show a first anatomical region AR1, a second anatomical region AR2, and a third anatomical region AR3. Thespecimen chamber 16 is deployed from the endoscope's 40 biopsy channel to obtain consecutive tissue core specimens withinanatomical regions MCB device 10 or theMCBS 100 may be used for ocular-based endoscopes as shown, or alternatively, for video-based endoscopes (not shown) in which images of theMCB device 10 operation is presented on nearby monitors (not shown) viewable by theMCB device 10 orMCBS 100 user. -
FIGS. 8A-8F depict movement operations of the multifunction biopsy device handle 50 to deploy depth stops, advance thespecimen chamber core 16, and activate thecutting blade 20. The general method of using theMCB 10 orMCBS 100 begins with thespecimen chamber 16 is retracted within thesheath 14 andblade 20 in a stowed or un-deployed state to allow the MCB/S 10/100 to be safely passed through the biopsy channel of the endoscope depicted inFIG. 7 . Once it exits the distal end of the endoscope in direct visualization of the physician the depth stops 18 are deployed (Step 1). As shown in FIGS. 8A/8B, the depthstop deployment control 54 is slid in the direction of the motion arrow alongchannel 60. After deployment of the depth stops 18 performed inStep 1, the core biopsy specimen chamber orshaft 16 can be advanced to the set depth, and so emerges beyond the terminus of the sheath 14 (Step 2) to be equivalent to the plunging depth defined by the consistent depth via depth stops 18, set core advancement and blade swing. As shown inFIG. 8C , rotation of thespecimen chamber control 61 will advance thespecimen chamber 16 to a set depth. Once the specimen chamber is advanced, a biopsy location is chosen for receiving the plunging or thrusting action of thespecimen chamber 16 into the mucosal wall to the set depths in which the depth stops 18 prevent thespecimen chamber 16 from further penetration than desired. Once thespecimen chamber 16 is plunged to the set depth theblade control member 66 is advanced (Step 3) and the tissue specimen excised by cutting action of theblade 20. Thethumbhole 66 provides an ergonomic structure to exert pushing or pulling actions of the blade control. TheMCB 10 orMCBS 100 is retracted from the mucosal wall, and theblade control 66 is engaged to stow theblade 20 back into its un-deployed state and another biopsy site is selected andStep 3 is repeated until the desired numbers of biopsies are retrieved. Previously collected specimens already occupying the lumen space of thespecimen chamber 16 are further displaced more internally therein, as shown inFIGS. 25D-F below. At this point the specimenchamber shaft control 61 is turned to retract thespecimen chamber 16 intosheath 14. Thedepth stop control 54 is then pulled back to retract the depth stops 18 within thesheath 14. If specimens temporarily housed within the lumen space of thespecimen chamber 16 are not suction transferred to the proximalspecimen management chamber 80 shown inFIG. 4 , thesheath 14 is removed from the biopsy channel of the endoscope to allow removal via retrograde flushing of the specimens contained within the lumen of thespecimen chamber 16 with preservation of sample integrity and sampling order and orientation. -
FIG. 9 depicts side top, and perspective views of the components of the multifunction biopsy device handle to effect the movement actions to deploy and/or implement cutting actions of thespecimen chamber 16. Depth stop deployment is conveyed by the depthstop slider control 54 that is mechanically connectable with thedepth stop wire 35. Deployment of the depth stops 18 is initiated by downward direction of theslider control 54 until locked into place, and retraction or stowage of the depth stops 18 is initiated by movement reversal, that is, upward movement conveyed by theslider control 54 to thedepth stop wire 35. Theslider control 54 has aprojection 53 engagement withslot 55 ofspecimen chamber control 61. The depth stops 18 are deployed first. The removal of theprojection 53 from theslot 55 allows rotary operation of thespecimen chamber control 61 to permit deployment of thespecimen chamber 16 beyond the distal terminal end of thesheath 14. - The rotary motion of the
specimen chamber control 61 is conveyed byhelical turns 94 that engagesmotion converter 93.Specimen chamber wire 33 is attached tocrossbar 97 that engages motion converter's 93curved slot 95 to produce a linearly directed, back-and-forth or push-pull motion along the long axis ofhandle 50 to and through thespecimen chamber wire 33 which advances and retracts the specimen channel which includes the specimen chamber. - The back-and-forth or push-pull motion by the
thumbhole 66 is conveyed by slottedshaft 56 that is mechanically coupled with theblade wire 37. Cutting action by theblade 20 is conveyed by a downwardly directed pushing force applied to thethumbhole 66 by ahandle 50 user or operator. Similarly, retraction of theblade 20 to its stowed position is initiated by an upwardly directed pulling force conveyed by thethumbhole 66. Conversely, thehandle 50 can be configured such that an upward pulling motion engages cutting action and a downward pushing motion engages blade stowage. - After specimens are collected within the
specimen chamber 16, theblade 20 is returned to its stowed state by motion ofthumbhole slider 66. Thereafter, thespecimen chamber control 61 is rotated to retract the specimen chamber 16-190 to place theslot 55 to be engageable with theprojection 53. Upward movement of the depthstop slider control 54 retracts depth stops 18 within thesheath 14 upon slidable engagement of theprojection 53 withslot 55. -
FIG. 10 schematically depicts tissue specimen sampling deployments of the multiplecore biopsy device 10 from the biopsy channel of a flexible endoscope to obtain multiple tissue core specimens withinanatomical region 2 depicted inFIG. 7 . Here three separate deployments of thespecimen chamber 16 with the depth stops 18 set, one deployment depicted with solid lines and two deployments depicted in dashed lines. Operation of theblade 20 after thespecimen chamber 16 has been plunged into the tissue to obtain histological grade core specimens depicted inFIGS. 12A-D below. -
FIGS. 11A-11C depicts deployment of themulti-core biopsy device 10specimen chamber 16 and depth stops 18 fromsheath 14. Prior to plunging the forward facing cutting surfaces of the specimen chamber's 16movable blade 20 and/or stationary regions, the specimen chamber is advanced from itssheath 14 and locked into place viaspecimen chamber control 61 ofmultifunction handle 50. InFIG. 11A the depth stops 18 are fully retracted or in a stowed position. InFIG. 11B , the depth stops 18 emerge from thesheath 14 while thespecimen chamber 16 remains retracted within thesheath 14. InFIG. 11C , thespecimen chamber 16 is advanced externally from the lumen of thesheath 14 via the handle's 50specimen chamber control 61. Thespecimen chamber 16 is set for plunging into the mucosal wall depicted inFIG. 12A-D below within a particular anatomical region, say AR1, 2, or 3 depicted inFIGS. 7 and 10 above. -
FIGS. 12A-12D schematically depict the plunging deployment of the multiple core biopsydevice specimen chamber 16 to the tissue depth defined by the depth stops 18 and subsequent cutting action of thesingle edge blade 20 withintissue 19. These cross-sectional depictions ofFIG. 12A show the operation ofspecimen chamber 16 during multiple core biopsy sampling as would be undertaken withinanatomical region 2 ofFIG. 10 above. In general the multifunction handle 50 of theMCB 10 orMCBS 100 has the deployable depth stops 18 set by operator manipulation of the handle's 50depth stop control 54 shown inFIG. 2 . - In
FIG. 12B the specimen chamber orbiopsy core 16 is advanced by manipulation of the handle's 50specimen chamber control 61 and subsequently pressed, thrusted, or plunged into the tissue. Cutting commences after plunging by manipulation of the handle's 50blade activation control 56. - In
FIG. 12C cutting action is completed by continued manipulation of the handle's 50blade activation control 56. A newly cut specimen is thereby acquired. - Thereafter, in
FIG. 12D , the newly cut specimen is delivered and pushed into temporary storage within the lumen of the specimen chamber orbiopsy core 16 by re-plunging the advanced specimen chamber orbiopsy core 16 into the tissue, thereby displacing or pushing the previous newly acquired cut further internally within the lumen space of thespecimen chamber 16. -
FIGS. 13A-13C schematically depict structure and deployment operations of the perpendicular single blade singleaxis specimen chamber 116. Presented inFIG. 13A are two cutting edges, the edge of themoveable blade 20 and the edge of the fixed portion of the facing edge of thespecimen chamber 116. In the stowed position, both the cutting edge of theblade 20 and the cutting edge of the fixed portion is perpendicular to the long axis of thespecimen chamber 116. The blade is rotatable aboutsingle axis pivot 22. Depth stops 18 are deployed throughsheath apertures 121 via deflector posts 123. - In
FIG. 13B , the specimen chamber is shown deployed. The arc of theblade 20 is deployed midway viablade control wire 37 and is at maximum height by almost the length of theblade 20. InFIG. 13C , the specimen chamber is shown deployed and the cutting action complete with theblade 20 pushed to maximum movement viablade control wire 37 and resting on the fixedportion end 21 inFIG. 13B . -
FIGS. 14A-14C schematically depict structure and deployment operations of the angled single blade singleaxis specimen chamber 120. Presented inFIG. 14A are two cutting edges, the edge of themoveable blade 122 and the edge of the fixedportion 125 of the facing edge of thespecimen chamber 120. In the stowed position, both the cutting edge of theblade 122 and the cutting edge of the fixedportion 125 is angled or beveled relative to the long axis of thespecimen chamber 120. Theblade 122 is rotatable aboutsingle axis pivot 22. Depth stops 18 are similarly deployed throughsheath apertures 121 via deflector posts 123. - In
FIG. 14B , thespecimen chamber 120 is shown deployed from the terminus of thesheath 14. The arc of theblade 122 is deployed midway viablade control wire 37 and is at maximum height by almost the length of theblade 122. InFIG. 14C , thespecimen chamber 120 is shown deployed and the cutting action completed with theblade 122 pushed to maximum movement viablade control wire 37 and resting on the fixedportion end 125. -
FIGS. 15A-15C schematically depict structure and deployment operations of the perpendicular double blade singleaxis specimen chamber 124. Presented inFIG. 14A are two rotatable cutting edges pivotable aboutsingle axis 22, asmaller cutting blade 126 and alarger cutting blade 128. The edge of themoveable blades specimen chamber 124. In the stowed position, both rotatable cutting edges of theknives specimen chamber 124. Theknives single axis pivot 22. Depth stops 18 are similarly deployed throughsheath apertures 121 via deflector posts 123. - In
FIG. 15B , thespecimen chamber 124 is shown deployed from the terminus of thesheath 14. The arcs of thelarger blade 128 andsmaller blade 126 are approaching midway deployment viablade control wire 37. - In
FIG. 15C , thespecimen chamber 124 is shown deployed and the cutting action completed with thelarger blade 128 overlapping thesmaller blade 126. -
FIGS. 16A-16C schematically depict structure and deployment operations of the perpendicular double blade doubleaxis specimen chamber 128. Presented inFIG. 16A are two rotatable cutting edges orblades 132 pivotable about theirown axis 134. Eachblade 132 counter-rotates relative to the other. The edge of themoveable blades 132 are the forward facing cutting surfaces of thespecimen chamber 128. In the stowed position, bothrotatable cutting edges 132 are perpendicular relative to the long axis of thespecimen chamber 128. Theblades 132 are rotatable about theirown axis pivot 134. Depth stops 18 are similarly deployed throughsheath apertures 121 via deflector posts 123. - In
FIG. 16B , thespecimen chamber 128 is shown deployed to the terminus of thesheath 14. The arcs of theblades 132 are approaching midway deployment viablade control wires 37. - In
FIG. 16C , thespecimen chamber 128 is shown deployed and the cutting action completed with theknives 132 abutting against each other to complete specimen severing. -
FIGS. 17A-17E schematically depict structure and deployment operations of the angled double blade singleaxis specimen chamber 132. Presented inFIG. 17A are two counter rotatable cutting edges or blades, asmaller blade 134 and alarger blade 138, each counter rotatable to the other via pivot oraxis 22. Thelarger blade 138 counter-rotates relative to thesmaller blade 134 until cutting action is completed whenlarger blade 138 overlapssmaller blade 134. The edge of themoveable blades specimen chamber 132. In the stowed position, both counterrotatable cutting edges specimen chamber 132. Theblades common pivot 22 they share. Depth stops 18 are similarly deployed throughsheath apertures 121 via deflector posts 123. - In
FIGS. 17B and 17E , thespecimen chamber 132 is shown deployed from the terminus of thesheath 14. The arcs of theblades blade control wires 37. - In
FIG. 17C , thespecimen chamber 128 is shown deployed and the cutting action completed with thelarger blade 138 overlapping thesmaller blade 134 to complete specimen severing. -
FIGS. 17D-E depicts in perspective view the advancement of thespecimen chamber 132 advanced from the terminus of thesheath 14. InFIG. 17D theblades chamber 132, and ready for plunging into an anatomical region. InFIG. 17E the small andlarger blades common pivots 22 to which small andlarge blades sheath apertures 121 from which the depth stops 18 emerge. -
FIGS. 18A-18C schematically depicts structure and deployment operations of the angled double blade doubleaxis specimen chamber 136. Presented inFIG. 18A are two counter rotatable cutting edges orblades 138 of substantially equal length in a stowed state that provide the forward facing cutting edges in an angled or beveled configuration relative to the long axis of thespecimen chamber 136. Depth stops 18 are similarly deployed throughsheath apertures 121 via deflector posts 123. - In
FIG. 18B , thespecimen chamber 136 is shown deployed from the terminus of thesheath 14. Theblades 138 are rotatable about theirown axis pivot 134. The arcs of theblades 138 are approaching midway deployment viablade control wires 37. Oneblade 138, being higher than theother blade 138, provides the larger cutting arcInFIG. 18C , thespecimen chamber 136 is shown deployed and the cutting action completed with the higher positionedblade 138 abutting against the lower positionedblade 138 to complete specimen severing. -
FIGS. 19A-19D schematically depict in perspective and top views alternative embodiments of depth stops 18 configurations deployed from thesheath 14 housing the perpendicularsingle blade 20 singleaxis specimen chamber 16. Perspective views show a partially deployedblade 20 and thatspecimen chamber 16 is shown advanced beyond the terminal end of thesheath 14. Top views do not illustrate partially deployedblade 20 but do illustrate positioning of deployed depth stops 18/118 in relation tosheath 14 andspecimen chamber 16. The alternate configurations provide for more contact points to secure levels of footing to deploy plunging operations of theadvanced specimen chamber 16. -
FIG. 19A illustrates two deployed depth stops 18, one clearly seen to emerge fromsheath aperture 121. The depth stops 18 are diagonally positioned relative to each other, that is, about 120 degrees apart from the center of thechamber lumen 125 and provide for a two-legged stand from which to engage plunging of the deployedspecimen chamber 16. -
FIG. 19B illustrates three deployed depth stops 18, two clearly seen to emerge fromsheath apertures 121. The depth stops 18 are about 120 degrees apart from each other relative to the center of thechamber lumen 125 and provide a tripod-like stability from which to engage plunging of the deployedspecimen chamber 16. -
FIG. 19C illustrates four deployed depth stops 18, two clearly seen to emerge fromsheath apertures 121. The depth stops 18 are about 90 degrees apart from each other relative to the center of thechamber lumen 125 and provide for a four-legged stand from which to engage plunging of the deployedspecimen chamber 16. -
FIG. 19D illustrates two deployeddepth stop loops 118, the loops deployed from thesheath apertures 121. Thestop loops 118 are deployed across from each other and provide for additional stability from which to engage plunging of the deployedspecimen chamber 16. -
FIGS. 20A-20B schematically depicts structure and deployment operations of the angled double cantilevered blade singleaxis specimen chamber 140. -
FIG. 20A presents the cantileveredspecimen chamber 140 configured with two cutting blades in an angled configuration, asmall cutting blade 142 with alever projection 144, and alarger cutting blade 146 with alever projection 148. Eachblade 142/146 rotates aboutpivot axis 150 shared between them.Blade control wires 37 connects to leverprojections -
FIG. 20B presents deployment ofsmall blade 142 andlarge blade 146 of the cantileveredspecimen chamber 140. A downward pulling action conveyed by theblade control wires 37 initiated by the downward action applied by the operator to thumbhole 66 ofmultifunction handle 50 shown inFIG. 2 engages rotation ofsmall blade 142 andlarge blade 146, each counter-rotating relative to the other to commence cutting action. Theblades 142/146 are returned to the stowed position by a pulling action applied to thethumbhole 66 by the user operating thehandle 50. -
FIGS. 21A-21G schematically depicts structure and deployment operations of the perpendicular double cantilevered blade singleaxis specimen chamber 160. -
FIG. 21A presents the cantileveredspecimen chamber 160 configured with two cutting blades in a perpendicular configuration, asmall cutting blade 162 with alever projection 164, and alarger cutting blade 166 with alever projection 168. Eachblade 162/166 rotates aboutpivot axis 150 shared between them.Blade control wires 37 connects to leverprojections -
FIGS. 21B-D schematically depicts perspective views of cutting action, retraction, and stowage of theblades 162/166. Presented inFIG. 21B , a downward applied pulling action applied by the operator to thumbhole 66 ofmultifunction handle 50 shown inFIG. 2 engages rotation of theblades 162/166 to their completed, cutting state, with thesmaller blade 162 enveloped within thelarger blade 166. When a pulling force is applied to thethumbhole 66 ofhandle 50 as shown inFIGS. 21C and D, the blade control wires move upward to retract theblades 162/166 to the stowed state. -
FIGS. 21E-G schematically depicts side views of specimen sample procurement from completion of cutting action, retraction, and stowage of theblades 162/166. Depth stops 18 are deployed. Specimens ofhistological quality 170 are housed within the lumen ofspecimen chamber 160. Presented inFIG. 21E a downward applied pulling action applied by the operator to thumbhole 66 ofmultifunction handle 50 shown inFIG. 2 engages rotation of theblades 162/166 to their completed, cutting state to severe a histological grade specimen devoid of crush artifacts. As shown inFIGS. 21F and G, when a pushing force is applied to thethumbhole 66 ofhandle 50 theblade control wires 37 move upward to retract theblades 162/166 to the stowed state. -
FIG. 22 schematically depict structure and deployment operations of the angled single blade singleaxis specimen chamber 120 with depthstop deflection cap 165. Depthstop deflection cap 165 may be inserted into thesheath 14 such thatdeflectors 123 are aligned withsheath apertures 121. -
FIGS. 23A-23C schematically depicts alternate configurations of blade cutting surfaces.FIG. 23A shows a single edge razor configuration facing internally (per left inset) and curved with thesemi-circular blade 20 pivoting about the forward face ofspecimen chamber 16. In other embodiments, as shown in the middle inset ofFIG. 23A , the single edge razor may face outward, that is the razor sharp edge may be occupy the largest external arc of theblade 20, external such that the razor's edge is at the maximum arc. Or, alternatively, the razor may be double edge shown in the right inset where the razor's edge occupies the middle of theblade 20.FIG. 23B illustrates a serrated configuration, andFIG. 23C a toothed configuration. The serrated and tooth configurations may also have an internal razor's edge, internal razor's edge, or double edged where the razor's edge is in the middle of the blade. -
FIGS. 24A-24E schematically depicts structure and deployment operations of a rotary cuttingspecimen chamber 190. InFIG. 24A thespecimen chamber 190 is plunged into the target tissue to effect cutting via cutting edge or cuttingcircumference 192.Specimen chamber 190 is then rotated and counter rotated to effect cutting with cuttingwire 194 spanning across the middle of the forward presenting lumen face ofspecimen chamber 190. InFIG. 24B , upon plunging into tissue limited by the depth set by depth stops 18, the cutting wire bisects the tissue specimen equally into two halves. Each half of the tissue specimen is kept separated bytissue divider 196. -
FIG. 24C depicts a perspective view of thespecimen chamber 190 with deployment of depth stops 18 from thesheath 14. In an alternate embodiment, thecutting wire 194 may be replaced with a cuttingwedge 198. Thespecimen divider 196 similarly preserves the specimen halves, their tissue integrity, sampling order and orientation. -
FIGS. 24D-E illustrate perspective and side views of thespecimen chamber 190 with deployed depth stops 18. -
FIGS. 25A-25F schematically depicts structure and deployment operations of the perpendicular double cantilevered blade singleaxis specimen chamber 188 in the sequential or consecutive acquisition of histological grade tissue specimens temporarily housed within thespecimen chamber 188. - Presented in
FIGS. 25A and 25B is the deployment of four depth stops 18. Top views show the depth stops retracted withinsheath 14 inFIG. 25A and then deployed inFIG. 25B . - In
FIG. 25C thespecimen chamber 188 is deployed beyond the terminus ofsheath 14, readied for plunging into tissue to procure a specimen. -
FIG. 25D previously acquired specimens are pushed or displaced downward (wide, white motion arrows) upon thrusting or plunging action of thespecimen chamber 188 into a tissue sampling site chosen by the operator indicated inFIGS. 7 and 10 . -
FIG. 25E illustrates commencement of cutting action byblades 162/166 when a downward motion toblade control wire 37 is effected by a pulling action applied by the operator to thumbhole 66 ofmultifunction handle 50 shown inFIG. 2 engages the mutual counter rotation ofblades 162/166 via cable's 37 connection withlever projections 164/168 to a midpoint inblades 162/166 cutting action. -
FIG. 25F illustrates completion of cutting action byblades 162/166 when the downward motion toblade control wire 37 is effected by completion of pushing force applied by the operator to thumbhole 66 ofmultifunction handle 50 shown inFIG. 2 . The just cut specimen then may be displaced into the lumen of thespecimen chamber 188 by retraction of theblades 162/166 to their stored state via a pulling force applied to thethumbhole 66 ofmultifunction handle 50 and then re-plunging thechamber 188 at another sample site depicted inFIG. 25D . -
FIG. 26 presents a perspective view of thespecimen chamber 16 in relation to thesheath 14. -
FIG. 27 presents an alternate embodiment depiction of theMCB 10 depicted inFIG. 1 . -
FIG. 28 presents a side view depiction of an alternate embodiment to themultifunction handle 50 depicted inFIG. 2 . -
FIG. 29 presents another depiction of thedepth stop 18 deployment from theMCB 10 described inFIG. 12A . -
FIG. 30 presents another depiction of the setting of the specimen chamber's 16 plunging distance and advancement to that plunging distance from theMCB 10 described inFIG. 12B . -
FIG. 31 presents another depiction of the initiation of cutting action by theblade 20 fromspecimen chamber 16 from theMCB 10 described inFIG. 12C . -
FIG. 32 presents another depiction of the cutting action by theblade 20 fromspecimen chamber 16 and storage of multiple tissue sections stored within thespecimen chamber 16 from theMCB 10 described inFIG. 12D . -
FIG. 33 present alternate cross-sectional and perspective views depictingspecimen chamber 188 deployment and blade operation shown inFIGS. 25A-F above. -
FIG. 34 presents additional cross-sectional and perspectiveviews specimen chamber 188 deployment and blade operation depicted inFIGS. 25A-F above. -
FIG. 35 presents another side view and perspective depiction of the rigid multi-corespecimen biopsy device 200 depicted inFIG. 5 above. -
FIG. 36 schematically depicts side and cross-sectional views of another depiction ofproximal specimen chamber 80 connectable with themulti-function handle 50 for specimen retrieval via aspiration or gentle suction directed to thebiopsy access port 68 from thedistal chamber 16 into theproximal chamber 80 with preservation of specimen sampling order and specimen orientation. -
FIG. 37 schematically depicts side and cross-sectional views of retrieval of themultiple tissue specimens 19 from thedistal specimen chamber 16 via fluid flushing fromsyringe 355 connected to thebiopsy access port 68. The flushed tissues are ejected from thedistal specimen chamber 16 into a net 360 fitted withclosure 365 with preservation of sampling order and specimen orientation. - The foregoing described above provides for embodiments of a
MCB - Other embodiment of the
MCB 10 orMCB 100 provide for complete aspiration of the multiple specimen's into the proximal specimen management chamber attached to theproximal handle 50. This allows for unlimited number of biopsies taken in a single pass, in other words without removing the MCB from the endoscope. - Other embodiment of the
MCB 10 orMCB 100 further provide for a stylet to be inserted into the center of the core biopsy to maintain rigidity as it is used to thrust into a submucosal tumor. Once positioned in direct view using an Endoscopic Ultrasound Scope the stylet is removed and a series of biopsy's are taken as describe above. - While the preferred embodiment of the invention has been illustrated and described, as noted above, many changes can be made without departing from the spirit and scope of the invention. For example, other embodiments may include multiple ports for adaptable multiple flushing syringes having different fluids. Accordingly, the scope of the invention is not limited by the disclosure of the preferred embodiment. The design of taking multiple biopsies in this embodiment is applicable to any surgical and non-surgical endoscopy for any part of the body. It is not limited to only endoscopy but any surgical modality where tissue specimens are taken or used for tumors extraction. In fact this device can operate without the outer sheath and depth stops in certain surgical applications. Instead, the invention should be determined entirely by reference to the claims that follow.
Claims (26)
1. A biopsy device operable through an endoscope by a user comprising:
a flexible sheath having a terminus with a distal chamber configured with a forward facing cutting edge comprising a fixed blade and at least one movable blade; and
a manipulation end controllable by the user to plunge the forward facing cutting edge at a set depth or a depth selected by the user and to engage a cutting action by the at least one movable blade at the set depth or the depth selected to acquire a plurality of specimens storable in the distal chamber.
2. The biopsy device of claim 1 , wherein the fixed blade and the at least one movable blade are configured perpendicular to the long axis of the chamber.
3. The biopsy device of claim 1 , wherein the fixed blade and the at least one movable blade are configured angular to the long axis of the chamber.
4. The biopsy device of claim 1 , wherein the at least one movable blade is pivotable about a single axis.
5. The biopsy device of claim 1 , wherein the at least one movable blade comprises two counter rotating blades configured perpendicular to the long axis of the chamber and pivotable about a single axis shared between the two counter rotating blades.
6. The biopsy device of claim 1 , wherein the at least one movable blade comprises two counter rotating blades configured angular to the long axis of the chamber and pivotable about a single axis shared between the two counter rotating blades.
7. The biopsy device of claim 1 , wherein the at least one movable blade comprises two counter rotating blades configured perpendicular to the long axis of the chamber, each counter rotating blade configured to pivot from a separate axis.
8. The biopsy device of claim 1 , wherein the at least one movable blade comprises two counter rotating blades configured angular to the long axis of the chamber, each counter rotating blade configured to pivot from a separate axis.
9. The biopsy device of claim 1 , wherein the forward facing cutting edge includes a wire spanning across the middle of the forward facing cutting edge and a plate beneath the wire, wherein the plurality of specimens are cut the long axis to form a plurality of specimen half pairs, the specimen half pair kept separated by the plate.
11. The biopsy device of claim 1 , wherein the at least one moveable blade is initiated by a pulling action from the manipulation end.
12. The biopsy device of claim 1 , wherein the at least one moveable blade is initiated by a pushing action from the manipulation end.
13. The biopsy device of claim 1 , wherein the set depth or the depth selected is effected by the deployment of depth stops from the flexible sheath adjacent to the distal chamber initiated from the manipulation end.
14. The biopsy device of claim 1 , wherein the manipulation end includes a proximal chamber in fluid communication with the distal chamber, the proximal chamber configured to receive the plurality of specimens in the order and orientation acquired upon exposure of a suction conveyed through the flexible sheath.
15. The biopsy device of claim 1 , wherein the plurality of specimens are removed from the distal specimen chamber by a flushing fluid conveyed from the manipulation end with preservation of specimen order and orientation.
16. A biopsy system operable through an endoscope by a user comprising:
a flexible sheath having a terminus with a distal chamber configured with a forward facing cutting edge comprising a fixed blade and at least one movable blade; an
a manipulation end controllable by the user to plunge the forward facing cutting edge at a set depth or a depth selected by the user and to engage a cutting action by the at least one movable blade at the set depth or the depth selected to acquire a plurality of specimens storable in the distal chamber; and
a proximal chamber in fluid communication with the distal chamber, the proximal chamber configured to receive the plurality of specimens in the order and orientation acquired upon exposure of a suction conveyed through the flexible sheath.
17. The biopsy system of claim 16 , wherein the fixed blade and the at least one movable blade are configured perpendicular to the long axis of the chamber.
18. The biopsy system of claim 16 , wherein the fixed blade and the at least one movable blade are configured angular to the long axis of the chamber.
19. The biopsy system of claim 16 , wherein the at least one movable blade is pivotable about a single axis.
20. The biopsy system of claim 16 , wherein the at least one movable blade comprises two counter rotating blades configured perpendicular to the long axis of the chamber and pivotable about a single axis shared between the two counter rotating blades.
21. The biopsy system of claim 16 , wherein the at least one movable blade comprises two counter rotating blades configured angular to the long axis of the chamber and pivotable about a single axis shared between the two counter rotating blades.
22. The biopsy system of claim 16 , wherein the at least one movable blade comprises two counter rotating blades configured perpendicular to the long axis of the chamber, each counter rotating blade configured to pivot from a separate axis.
23. The biopsy system of claim 16 , wherein the at least one movable blade comprises two counter rotating blades configured angular to the long axis of the chamber, each counter rotating blade configured to pivot from a separate axis.
24. The biopsy system of claim 16 , wherein the forward facing cutting edge includes a wire spanning across the middle of the forward facing cutting edge and a plate beneath the wire, wherein the plurality of specimens are cut the long axis to form a plurality of specimen half pairs, the specimen half pair kept separated by the plate.
25. A biopsy device having a removable stylet, the biopsy used operable by a person used with an image-guided system comprising:
a rigid sheath equipped with the removable stylet, the rigid sheath having depth markings visible by the image-guided system and a terminus with a distal chamber configured with a forward facing cutting edge comprising a fixed blade and at least one movable blade; and
a manipulation end controllable by the user to plunge the forward facing cutting edge at a sampling locus after removal of the stylet at a depth selected by the user based on the depth markings and to engage a cutting action by the at least one movable blade at the depth selected to acquire at least one specimen storable in the distal chamber.
26. The biopsy device of claim 20 , wherein additional specimens may be acquired at deeper depths at the sampling locus.
27. A method to acquire biopsy specimens from a region-of-interest using a system operable through the internal or external biopsy channel of an endoscope tube residing internally within a patient manipulatable by a user, the method comprising:
inserting a flexible sheath fitted with a specimen chamber fitted with a forward facing cutting edge through and beyond the terminus of the biopsy channel to place the specimen chamber near the region-of-interest;
manipulating the specimen chamber via a handle in mechanical contact with the specimen chamber to deploy a plurality of depth stops and extend the specimen chamber beyond the terminus of the flexible sheath at a set or selected distance by the user;
plunging the specimen chamber forward facing cutting edge into tissues occupying the region-of-interest to the set or selected distance;
acquiring and storing a plurality of specimens in the specimen chamber; and
procuring the plurality of specimens from the specimen chamber in the order and orientation acquired.
Priority Applications (4)
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US15/727,362 US11076841B2 (en) | 2009-11-25 | 2017-10-06 | Dual movable blade biopsy tool for multiple core biopsy |
US17/348,269 US11864744B2 (en) | 2009-11-25 | 2021-06-15 | Dual movable blade biopsy tool with stylet |
US18/503,468 US20240065678A1 (en) | 2009-11-25 | 2023-11-07 | Dual movable blade biopsy tool with stylet |
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US26462809P | 2009-11-25 | 2009-11-25 | |
US12/954,584 US20110125054A1 (en) | 2009-11-25 | 2010-11-24 | Device, system and method for multiple core biopsy |
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US15/727,362 Division US11076841B2 (en) | 2009-11-25 | 2017-10-06 | Dual movable blade biopsy tool for multiple core biopsy |
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US15/727,362 Active 2032-03-18 US11076841B2 (en) | 2009-11-25 | 2017-10-06 | Dual movable blade biopsy tool for multiple core biopsy |
US17/348,269 Active 2031-05-31 US11864744B2 (en) | 2009-11-25 | 2021-06-15 | Dual movable blade biopsy tool with stylet |
US18/503,468 Pending US20240065678A1 (en) | 2009-11-25 | 2023-11-07 | Dual movable blade biopsy tool with stylet |
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US15/727,362 Active 2032-03-18 US11076841B2 (en) | 2009-11-25 | 2017-10-06 | Dual movable blade biopsy tool for multiple core biopsy |
US17/348,269 Active 2031-05-31 US11864744B2 (en) | 2009-11-25 | 2021-06-15 | Dual movable blade biopsy tool with stylet |
US18/503,468 Pending US20240065678A1 (en) | 2009-11-25 | 2023-11-07 | Dual movable blade biopsy tool with stylet |
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Also Published As
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US11076841B2 (en) | 2021-08-03 |
US20240065678A1 (en) | 2024-02-29 |
US11864744B2 (en) | 2024-01-09 |
US20180064426A1 (en) | 2018-03-08 |
US20210307734A1 (en) | 2021-10-07 |
WO2011066470A1 (en) | 2011-06-03 |
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