US20150374522A1 - Endoscope with preloaded or preloadable stent - Google Patents
Endoscope with preloaded or preloadable stent Download PDFInfo
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- US20150374522A1 US20150374522A1 US14/814,909 US201514814909A US2015374522A1 US 20150374522 A1 US20150374522 A1 US 20150374522A1 US 201514814909 A US201514814909 A US 201514814909A US 2015374522 A1 US2015374522 A1 US 2015374522A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
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- A61B19/5202—
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- A61B19/5212—
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/30—Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/36—Image-producing devices or illumination devices not otherwise provided for
- A61B90/361—Image-producing devices, e.g. surgical cameras
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
- A61F2/06—Blood vessels
- A61F2/07—Stent-grafts
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/844—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents folded prior to deployment
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/9522—Means for mounting a stent or stent-graft onto or into a placement instrument
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
- A61F2/966—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
- A61F2/06—Blood vessels
- A61F2/07—Stent-grafts
- A61F2002/072—Encapsulated stents, e.g. wire or whole stent embedded in lining
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
- A61F2002/91533—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2002/9505—Instruments specially adapted for placement or removal of stents or stent-grafts having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
- A61F2002/9511—Instruments specially adapted for placement or removal of stents or stent-grafts having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument the retaining means being filaments or wires
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- A61F2002/9522—
Abstract
The present invention is directed to an endoscopic stent delivery device. The device includes an endoscope having an elongate shaft including a proximal end, a distal end, an outer wall and a longitudinal working channel through the elongate shaft defining an inner wall of the elongate shaft; a stent juxtaposingly disposed to a distal portion of the inner wall; and an inner tubular member slidably disposed within the working channel and having a stent holding member engaging an interior portion of the stent for releasably securing the stent to the distal portion of the inner wall. The device may further include a viewing device disposed at the distal end of the endoscope and/or an illuminating device disposed at the distal end of the endoscope.
Description
- This application is a continuation of U.S. application Ser. No. 11/861,565, filed Sep. 26, 2007, which claims the benefit of U.S. Provisional Application No. 60/897,382, filed Jan. 25, 2007, the contents of which are incorporated herein by reference.
- This invention relates to a system and method for endoscopic deliver of a stent. More particularly, this invention relates to an endoscope having a preloaded or preloadable stent, including a radially distensible, polymeric and/or non-polymeric stent.
- An intraluminary stent is a medical device used in the treatment of diseased bodily lumens, such as in the coronary or peripheral vasculature, esophagus, trachea, bronchi colon, biliary tract, urinary tract, prostate, brain, as well as in a variety of other applications in the body. Contemporary endoscopy practitioners increasingly often require visualization of the damaged vessel while delivering the stent. In some cases an endoscope and a stent delivery catheter are separately advanced to the damaged vessel to allow for visualization of the delivery of the stent from the stent delivery catheter. Such a procedure has size limitation, especially for smaller bodily lumens, as both the endoscope and the stent delivery catheter must be navigated to the damaged vessel.
- To avoid the need or disadvantage of intraluminally advancing two separate and independent devices, endoscopes and stent delivery systems have been combined. One technique may have a stent disposed within a stent delivery catheter and an endoscope which is slidable within an inner tube of the catheter. For example, U.S. Patent Application Publication No. 2006/0184224 A1 to Angel and U.S. Pat. No. 6,033,413 to Mikus et al. describe stent delivery systems having a catheter holding a stent between two tubes of the catheter and an endoscope being positioned within the inner shaft of the catheter. The combining of a stent delivery catheter and an endoscope in such a manner, however, limits the diameter of the contracted or loaded stent to a diameter larger than that of the endoscope. In other words, the overall profile of the delivery system is constrained by the size of the endoscope.
- Another technique used to avoid the need for separately advancing independent endoscopes and stent delivery catheters, is to have a stent constrained within a stent delivery catheter where the stent delivery catheter is slidably disposed within a lumen of the endoscope. For example, U.S. Patent Application Publication Nos. 2002/0143387 A1 to Soetikno et al.; 2004/0098105 A1 to Stinson et al.; 2005/0090889 A1 to Yanuma et al. and 2005/0125050 A1 to Carter et al. and U.S. Pat. No. 6,162,231 Mikus et al.; U.S. Pat. No. 6,093,194 to Mikus et al. and U.S. Pat. No. 6,620,570 to Stinson et al. describe a stent delivery catheter having a stent disposed between two tubes where the catheter is fittable through a working channel of an endoscope. Again, the overall profile of the endoscope is limited to a relatively large size as the endoscope must be sized for accenting the stent delivery catheter.
- Other approaches include the endoscopic systems as described in U.S. Pat. No. 6,176,873 to Ouchi and U.S. Pat. No. 6,146,389 to Geitz, and International PCT Patent Application Publication No. WO 2005/122953 A2 to Selden. Ouchi describes an endoscope having a mesh stent disposed within the endoscope. The stent has includes rings or tubes at both ends of the stent where the rings or tubes restrict the diameter of the stent ends. A pusher tube within the endoscope is described as being pushed to engage the ring or tube at the distal end of the stent to radially contract the stent and to urge the contracted stent out from a working channel of the endoscope. Such a system makes stent placement difficult as the stent is pushed away from the distal end of the endoscope. Further, the need of rings or tubes at the ends of the stent which are smaller in diameter than the diameter of the expanded stent, limits the use of such a stent as the smaller ends of the stent will tend to restrict flow through the stent. Geitz describes an endoscope having a distal cap. A stent may be disposed over the distal cap and held there via an overlying sheath. For delivery the sheath is removed to deploy the stent. Selden describes a stent radially compressed against the sidewall of the distal portion of an endoscope. The stent is pushed out of the endoscope by a slidable release disposed within the endoscope that engages over the proximal end of the stent. The stent of Seldon is a highly flared stent with outwardly flared ends. Again the pushing of the stent out of the endoscope is problematic as accurate stent placement is difficult. Further, the device of Seldon is apparently limited to a particular stent design, i.e., a highly flared configuration with only the very terminal end portions of the stent being engageable with the wall to the endoscope such that the longitudinal expanse of the stent does not engage the wall of the endoscope as the stent is being pushed out of the endoscope.
- Thus, despite the efforts of the prior art, there is a need for an improved endoscopic stent delivery system. In particular, there is a need for an endoscopic stent delivery system which allows for accurate placement and delivery of the stent and which is not limited or constrained to particular stent designs or sizes as with the prior art devices.
- In one aspect, the present invention is directed to an endoscopic stent delivery device. The device may include an endoscope having an elongate shaft, which includes a proximal end, a distal end, an outer wall and a longitudinal working channel through the elongate shaft defining an inner wall of the elongate shaft; a stent juxtaposingly disposed to a distal portion of the inner wall; and an inner tubular member slidably disposed within the working channel and having a stent holding member engaging an interior portion of the stent for releasably securing the stent to the distal portion of the inner wall. The device may further include a viewing device disposed at the distal end of the endoscope and/or an illuminating device disposed at the distal end of the endoscope.
- The device, in particular the inner tubular member, may further include inner and outer telescoping members, where the stent may be disposed over the inner telescoping member. The outer telescoping member has a larger outer diameter than an outer diameter of the inner telescoping member, where exterior wall portions of the outer telescoping member juxtaposing may abut the inner wall of the elongate shaft. Further, the stent may be a radially distensible stent having a radially contracted state and a larger radially expanded state, and the outer telescoping member may abut a proximal end of the stent in the radially contracted state of the stent.
- The device may further include a suture thread having a portion securably attached to a proximal portion of the stent. The inner tubular member may farther include a longitudinally extending channel, and the suture thread may longitudinally extend through the longitudinal channel of the inner tubular member, whereby a pulling force proximally applied on the suture thread extending through the inner member may proximally move the stent within the working channel. The device may further include a stent loading member for radially compressing the stent into the working channel.
- Packaging, kits and methods of use are also provided.
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FIG. 1 is a perspective view of an embodiment of an endoscopic stent delivery device or system of the present invention. -
FIG. 2 is an exploded or enlarged view of the distal end of the endoscopic stent delivery device or system ofFIG. 1 . -
FIG. 3 is a cross-section view of the endoscopic stent delivery device or system ofFIG. 1 having a radially contracted stent disposed with the device or system. -
FIG. 4 is a cross-section view of the endoscopic stent delivery device or system ofFIG. 3 illustrating the initial deployment of a stent within a bodily lumen. -
FIG. 5 is a cross-section view of the endoscopic stent delivery device or system ofFIG. 3 illustrating the full or complete deployment of a stent within a bodily lumen. -
FIG. 6 is a cross-section view of the endoscopic stent delivery device or system ofFIG. 1 depicting a stent prior to being disposed within the device or system and having a suture thread secured to the proximal end of the stent with the suture thread being disposed over an inner tubular member. -
FIG. 7 is a cross-section view of the endoscopic stent delivery device or system ofFIG. 1 depicting a stent prior to being disposed within the device or system and having a suture thread secured to the proximal end of the stent with the suture thread being disposed within an inner tubular member. -
FIG. 8 is a cross-section view of the endoscopic stent delivery device or system ofFIG. 6 depicting the initial loading of the stent to within the device or system ofFIG. 1 . -
FIG. 9 is an alternate embodiment of the device or system ofFIG. 1 showing a radially compressed stent disposed within a stent holding member. -
FIG. 10 is an alternate embodiment of the stent holding member ofFIG. 9 . -
FIG. 11 is a planar view of the endoscopic device or system ofFIG. 1 . -
FIG. 12 is a planar view of an alternate embodiment of the endoscopic device or system ofFIG. 1 . -
FIG. 13 is a top planar view of different elements of the device or system ofFIG. 11 in a dissembled configuration. -
FIG. 14 is an exploded or enlarged view of a braided stent according to one aspect of the present invention. -
FIG. 15 is a cross-sectional view of a stent of the present invention illustrating an outer graft covering disposed on the stent. -
FIG. 16 is a cross-sectional view of a stent of the present invention illustrating an inner graft lining disposed on the stent. -
FIG. 17 is a cross-sectional view of the stent of the present invention illustrating an inner graft lining and an outer graft covering disposed on the stent. -
FIGS. 18-21 depict kits including the endoscopic device or system ofFIG. 1 . - The present invention relates to an endoscopic assembly and method for transporting and deploying a stent or other intraluminary member, as described herein, in a bodily passageway. The assembly is useful for medical applications in, but not limited to, the gastrointestinal tract, the biliary, tract, the urinary tract, and the respiratory tract. In particular, a preferred embodiment of the present invention is directed to an endoscopic delivery system having a stent loaded into a working channel. The stent may be loaded into the working channel of the endoscope either by a manufacturer of the assembly or by a practitioner of the assembly prior to use. The endoscope may be a disposable endoscope or a non-disposable endoscope. The endoscopic assembly and method of the present invention is particularly suitable for delivering a self-expanding esophageal stent. The endoscopic assembly in accordance with the present invention, however, could also be used in the neurological system (e.g., in the brain), the vascular system (e.g., in arteries or veins), in the cardiovascular system (e.g., in the heart) and in the like. Reference to bodily passageways may be to passageways in any of the aforementioned tracts and systems or elsewhere in the body.
- References herein to the term “distal” and variants thereof refer to a direction away from an operator of the subject invention, while references to the term “proximal” and variants thereof refer to a direction towards the operator of the subject invention. Accordingly, when the terms “distal” and “proximal” are used herein in the context of an assembly device that is being deployed within a body, such as a human body, by an operator, the term “distal” refers to a location within or near the body that is further within the body than a location that is “proximal” to the operator.
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FIG. 1 is a perspective view of an endoscopic stent delivery system ordevice 10 according to the present invention. Theendoscopic system 10 is particularly well suited for the transluminal delivery and intraluminal deployment of a radially self-expanding prosthesis, such as a stent and/or a stent-graft. Theendoscopic system 10 includes an elongate, flexibletubular member 12. Theendoscopic system 10 also includes adistal end 14 suitable for intraluminal navigation within bodily lumens (not shown). Theproximal end 16 is not intended for placement within a bodily lumen and suitably has controls, devices and/or connections (not shown) for visualization and delivery of a stent (not shown) contained or preloaded in thesystem 10. Such controls or devices may include, but are not limited to, stent delivery controls, system steering controls, controls for a source of gas or liquid, such as a flushing fluid for aiding endoscopic viewing, aids for viewing or illuminating, and the like. -
FIG. 2 is an exploded or expanded view of thedistal end 14 of thesystem 10 of the present invention. As depicted inFIG. 2 , thetubular member 12 of theendoscopic system 10 includes a workingchannel 18, an illumination device orchannel 20 and a visualization device orchannel 22. The workingchannel 18 is useful for containing a radially contracted stent (not shown) and for delivery of the stent into a bodily lumen. While theillumination channel 20 and thevisualization channel 22 are depicted as two separate channels, the present invention is not so limited. For example, illumination and visualization functions may be combined into a single channel or otherwise provided within or about theflexible tubular member 12. - The illumination device or
channel 20 provides light for the operation of theendoscope 10 within a bodily lumen. The illumination channel orchannel 20 may include, but is not limited to, a light emitting diode or a number of light emitting diodes, a fiber optic illumination guide for providing light from a light source, such as a laser or a white light source, and the like. Further a lens (not shown) may also be provided at the distal end of illumination channel orchannel 20 to focus the illumination on the bodily lumen or tissue. The visualization device orchannel 22 may be used to optically or electrically transmit images through theflexible tubular member 12 of thesystem 10 of the present invention. The visualization device orchannel 22 may include, but is not limited to, an objective lens and fiber optic imaging light guide communicating with a practitioner, a camera, a video display, a cathode ray tube (CRT), a liquid crystal display (LCD), digital light processing (DLP) panel, a plasma display panel (PDP), a light-emitting diode (LED) display, an organic light-emitting diode (OLED) display, a sensor, such as a charge-coupled device (CCD) sensor or a complementary metal oxide semiconductor (CMOS) sensor, and the like for use with computer displays, video monitors, televisions and the like. - The
endoscopic system 10 of the present invention is depicted in a partial cross-sectional view inFIG. 3 . As depicted inFIG. 3 thedistal portion 14 of theflexible tube 12 is positioned within abodily lumen 24. Astent 26 is contained within the workingchannel 18 at thedistal portion 14 of theendoscopic delivery system 10. The workingchannel 18 is an elongate cavity, desirably a tubular cavity, extending through theflexible tube 12. The workingchannel 18 also defines awall portion 28 of theflexible tube 12 or workingchannel 18. Thestent 26 is disposed against theinner wall surface 30 of the workingchannel 18 of theflexible member 12. - In
FIG. 4 , thestent 26 is shown as being deployed within thebodily lumen 24. As depicted inFIG. 5 , after the stent is deployed within thebodily lumen 24 the endoscopic delivery device may be retracted or withdrawn from thebodily lumen 24. Further, as depicted inFIGS. 3-5 , theendoscopic system 10 further includes aninner tubular member 32 having astent holding member 34. Thestent holder 34 releasably secures thestent 26 between theinner tubular member 32 and theinner wall surface 30 of the workingchannel 18. Desirably, thestent holder 34 is a hollow tubular band. More desirably, thestent holder 34 is a hollow tubular band that is free or substantially free of barbs, pins or protrusions which may engage and possible damage thestent 26. Thestent holder 34 may be made of any suitable polymeric, rubber, ceramic or metallic material. Moreover, thestent holder 34 may have a pattern, such as a surface pattern of indentations and/or protrusions, for facilitating securement of thestent 26. In some embodiments, thestent holder 34 may have barbs, pins, fins or protrusions which may engage thestent 26, in particularinterior portions stent interior portions stent interstitial portions interstitial portions 27 between undulation portions of the stent 26 (see, e.g.,FIG. 4 ) or aninterstitial portions 63 betweenbraided filaments 62 of the stent 60 (see, e.g.,FIG. 14 ). Further, theinterior portions stent luminal surface 65 of thestent 26, 60 (see, e.g.,FIG. 15 ). Moreover, with any of the embodiments, the device orsystem 10 may includemultiple stent holders 34, either axially spaced apart or axially juxtaposed. Further, thestent holder 34 may not have to completely encompass theinner tubular member 32, but may be only partially disposed around a circumferential portion of theinner tubular member 32. Desirably,stent holder 34 is disposed to secure a proximal portion of thestent 26. - The
endoscopic system 10 of the present invention may further, and optionally, include anintermediate tubular member 36. As described further below, theintermediate tubular member 36 may be useful for loading thestent 26 within the workingchannel 18 by, for example, a practitioner or user, where thestent 26 has not been preloaded into the workingchannel 18 by, for example, the manufacturer of theendoscopic system 10. Additionally, as described below, theintermediate tubular member 36 may also be useful for deploying, repositioning and/or retrieving thestent 26. -
FIGS. 6-10 depict several embodiments which may allow a practitioner or user to load thestent 26 within the workingchannel 18 of theendoscopic system 10. As depicted inFIGS. 6-8 , astent engaging member 38, which is depicted as being in the shape of a funnel, may be provided. In one aspect of the present invention, thestent engaging member 38 is provided separately from thestent 26 and theendoscopic system 10. In other words, thestent engaging member 38 need not be securably attached to theproximal end 14 of theendoscopic system 10. Desirably, the engagingmember 28 has a truncated-conical shape, outwardly diverging in the distal direction from its proximal end, e.g., the proximal end being smaller than the distal end. The proximal end has a diameter equal or substantially equal, including slightly larger, to the diameter of theintermediate tubular member 36, but less than the diameter of thewall portion 28 of theflexible tube 12 or workingchannel 18. The engagingmember 38 may be of any reasonable length and/or diameter to permit the loading of thestent 26. - As depicted in
FIG. 6 , the proximal end of thestent 26 may be placed within thestent engaging member 38. Thestent 26 may be squeezed or radially contacted within thestent engaging member 38 for placement against the proximal portion of thewall portion 28 of the workingchannel 18. Asuture loop 40 andthread portions 42 arrangement may be used to facilitate the loading of thestent 26 through within thestent engaging member 38 and into proximal portion of thewall portion 28 of the workingchannel 18. Thethread 42 may be looped radially around the proximal end or a portion of the proximal end of thestent 26 to form asuture loop 40 thereat. Thethread portions 42 may be pulled axially away from thestent engaging member 38 and thedistal portion 14 of theendoscopic system 10 and toward theproximal end 16 of theendoscopic system 10. Such a pulling force urges thestent 26 within thestent engaging member 38 and radially contracts thestent 26 as it passes through the smaller proximal portion of thestent engaging member 38 as depicted inFIG. 8 . In one aspect of the present invention, as depicted inFIGS. 6 and 8 , thethread portions 42 may be disposed about or outside of theinner tubular member 32. In another aspect of the present invention, as depicted inFIG. 7 , thethread portions 42 may be disposed within theinner tubular member 32. - Moreover, as depicted in
FIG. 9 , thestent 26 may be disposed in a radially contracted state in astent holding member 44. In such a case, the radially contracted orcompressed stent 26 may be slid into the workingchannel 18 by any of the above described techniques. For example, the practitioner or user may simply push the stent to within thedistal portion 14 of the workingchannel 18 and/or thestent 26 may have a suture loop 40 (not shown) and be pulled by thread portions 42 (not shown). - Further, as depicted in
FIG. 10 , a stent engaging member 46 need not have a funnel shape as depicted for thestent engaging member 38 ofFIGS. 6-8 . As depicted inFIG. 10 , the practitioner or used may radially contract or compress only a portion of thestent 26 within the stent engaging member 46, and thestent 26 may then be suitably pulled or pushed or otherwise disposed within thedistal portion 14 of the workingchannel 18. - Alternatively, the
stent 26 may be disposed within a loading cartridge (not shown) for facilitating storage and delivery of thestent 26 into the workingchannel 18. Thestent 26 may suitably be loaded in its radially contracted or radially expanded or quiescent state. Desirably, when thestent 26 is a polymeric stent, the stent is stored in the expanded or quiescent state within a loading cartridge or other holding device (not shown). In such a case the stent may be slightly contracted, i.e., less than about five percent radial contraction, so that the stent does not slip or substantially move during transport of handling of the stent holder or stent loading cartridge. The loading cartridge may contain a piston or other axially movable member to facilitate stent movement. Details of suitable stent loading cartridges are further described in U.S. Pat. No. 6,068,635 and/or U.S. Patent Application Publication 2003/0083730 A1, the contents of which are incorporated herein by reference. - As discussed above, the
endoscopic system 10 of the present invention may optionally include theintermediate tubular member 36. For example, as depicted inFIG. 11 , theendoscopic system 10′ includes the outer flexible tubular orendoscopic member 12, theintermediate tubular member 36, and theinner tubular member 32. The outer flexible tubular orendoscopic member 12 includes the above-described workingchannel 18, the illumination device orchannel 20 and the visualization device orchannel 22. Theintermediate tubular member 36 and theinner tubular member 32 are slidably disposed within the workingchannel 18 of the outer flexible tubular orendoscopic member 12. - The flexible tubular
endoscopic member 12, theintermediate tubular member 36, and theinner tubular member 32 may also haverespective handles handles handles handles handles endoscopic system 10′ may be activated by sliding a button (not shown) on one of the handles or otherwise disposed on theendoscopic system 10′. Such activation may move any or all of thetubular members - Furthermore, as depicted in
FIG. 11 , the systems of the present invention may further include adistal tin 56 disposed at the distal end of theinner tubular member 32. Thedistal tip 56 is useful for navigating bodily lumens without causing trauma to the same. The stent 26 (not shown) may be preloaded in thesystem 10′ or may be loaded into thesystem 10′ by the practitioner or user. In one aspect of the present invention, thestent 26 is loaded or loadable within theintermediate tubular member 36, and theintermediate tubular member 36 is slid off of thestent 26 to dispose the stent against thewall portion 28 of the workingchannel 18. -
FIG. 12 depicts theendoscopic system 10″ which may not include theintermediate tubular member 36. In such a case the stent 26 (not shown) is normally preloaded into thesystem 10″) but the invention is not so limited. For example, as described above, the stent may be disposed directly against thewall portion 28 of the workingchannel 18. Theendoscopic system 10″ includes the above-described outer flexible tubular orendoscopic member 12, including the above-described workingchannel 18, the illumination device orchannel 20 and the visualization device orchannel 22. -
FIG. 13 is a top planar view of the different elements of thesystem inner tubular member 32 may be the longest member. Theintermediate tubular member 36 may be smaller than theinner tubular member 32, but longer than the outerendoscopic member 12. Finally, the outerendoscopic member 12 may be the shortest of the members. The present invention, however, is not so limited and other tube length configurations may suitably be selected. - The
tubular members tubular members - The
tubular members tubular members tubular member 12 to aid, if desired, in loading and/or deploying of thestent 26. Further, the outertubular member 12, and/or othertubular members - Any stent that is capable of radial expansion may be used in accordance with the present invention. For example, a radially
distensible stent 26 which does not substantially longitudinally elongate upon radial contraction is useful. A non-limiting example of such astent 26 is one formed from zig-zag or undulating wires or wire as depicted inFIGS. 3-10 . One undulating or zig-zag wire may be joined another undulating or zig-zag wire by, for example, awire strut 58. Alternatively, as depicted inFIG. 14 , astent 60, which is capable of being radially compressed and longitudinally extended for implantation into a bodily lumen, may be suitably used. The degree of elongation depends upon the structure and materials of thestent 60 and may be quite varied. The diameter of thestent 60 also may become several times smaller as it elongates. It is preferred that thestent 60 be constructed to self-expand when released from a radially compressed state. Thus, various stent types and stent constructions may be employed in the invention, and the invention can be constructed to accommodate stents of various sizes and configurations. - As depicted in
FIG. 14 , one embodiment of the present invention applies the method and system of the present invention to abraided stent 60.FIG. 14 is an exploded or enlarged view of thestent 60 to depict the braiding of thestent filaments 62. As used herein the term braiding and its variants refer to the diagonal intersection ofelongate filaments 62 so that each filament passes alternately over and under one or more of the other filaments, which is commonly referred to as an intersection repeat pattern. Useful braiding patterns include, but are not limited to, a diamond braid having a 1/1 intersection repeat pattern, a regular braid having a 2/2 intersection repeat pattern or a hercules braid having a 3/3 intersection repeat pattern. The passing of the filaments under and over one and the other results in slidable filament crossings that are not interlooped or otherwise mechanically engaged or constrained. Thefilaments 62 are interbraided at a crossing angle, .alpha.. The crossing angle, .alpha., may be any useful acute or obtuse angle. For example, acute angles from about 10.degree. to about 80.degree., more desirably from about 35.degree. to about 55.degree., are useful. Obtuse angles from about 95.degree. to about 170.degree., more desirably from about 100.degree. to about 120.degree., are also useful. - The
stent stent stent stent - While the
stent stent - Further, the
stent stent stent stent stent - Other features, which may be included with the
stent - Also, the
stent stent FIG. 15 , thestent stent FIG. 16 , thestent stent FIG. 17 , thestent stent FIG. 17 may be a unitary film or coating that embeds or partially embeds thestent Useful covering 64 and/or the liner 66 materials include, but are not limited, polyethylene, polypropylene, polyvinyl chloride, polytetrafluoroethylene (PTFE), including expanded polytetrafluoroethylene (ePTFE), fluorinated ethylene propylene, fluorinated ethylene propylene, polyvinyl acetate, polystyrene, poly(ethylene terephthalate), naphthalene dicarboxylate derivatives, such as polyethylene naphthalate, polybutylene naphthalate, polytrimethylene naphthalate and trimethylenediol naphthalate, polyurethane, polyurea, silicone rubbers, polyamides, polyimides, polycarbonates, polyaldehydes, polyether ether ketone, natural rubbers, polyester copolymers, styrene-butadiene copolymers, polyethers, such as fully or partially halogenated polyethers, silicones, and copolymers and combinations thereof. The coating or coatings may be on thestent stent - Moreover, the
stent 60 may include braided polyester filaments, such as PET polyester filaments. Further, in some applications, thestent 60 is desirably embedded in a coating of silicone. Additional details of such desirable stents are described in U.S. Pat. No. 6,162,244, the contents of which are incorporated herein by reference. - Further, the
stent stent stent stent - Further, the stent 26, 60 may be treated with a therapeutic agent or agents, such as, but not limited to, anti-thrombogenic agents (such as heparin, heparin derivatives, urokinase, and PPack (dextrophenylalanine proline arginine chloromethylketone); anti-proliferative agents (such as enoxaparin, angiopeptin, or monoclonal antibodies capable of blocking smooth muscle cell proliferation, hirudin, and acetylsalicylic acid); anti-inflammatory agents (such as dexamethasone, prednisolone, corticosterone, budesonide, estrogen, sulfasalazine, and mesalamine); antineoplastic/antiproliferative/anti-miotic agents (such as paclitaxel, 5-fluorouracil, cisplatin, vinblastine, vincristine, epothilones, endostatin, angiostatin and thymidine kinase inhibitors); anesthetic agents (such as lidocaine, bupivacaine, and ropivacaine); anti-coagulants (such as D-Phe-Pro-Arg chloromethyl keton, an RGD peptide-containing compound, heparin, antithrombin compounds, platelet receptor antagonists, anti-thrombin antibodies, anti-platelet receptor antibodies, aspirin, prostaglandin inhibitors, platelet inhibitors and tick antiplatelet peptides); vascular cell growth promotors (such as growth factor inhibitors, growth factor receptor antagonists, transcriptional activators, and translational promotors); vascular cell growth inhibitors (such as growth factor inhibitors, growth factor receptor antagonists, transcriptional repressors, translational repressors, replication inhibitors, inhibitory antibodies, antibodies directed against growth factors, bifunctional molecules consisting of a growth factor and a cytotoxin, bifunctional molecules consisting of an antibody and a cytotoxin); cholesterol-lowering agents; vasodilating agents; and agents which interfere with endogenous vascoactive mechanisms.
- The
systems FIG. 18 , akit 68 may include theendoscopic system compressed stent packaging 70 to contain or seal, including hermetically, the components therein. As depicted inFIG. 18 , akit 68 may include theendoscopic system compressed stent kit 68 may include apackaging 70 to contain or seal, including hermetically, the components therein. As depicted inFIG. 19 , a kit 72 may include theendoscopic system compressed stent stent holding member 44. The kit 72 may include apackaging 74 to contain or seal, including hermetically, the components therein. As depicted inFIG. 20 , akit 76 may include theendoscopic system stent stent engaging member 38. Thekit 76 may include apackaging 78 to contain or seal, including hermetically, the components therein. As depicted inFIG. 21 , akit 80 may include theendoscopic system stent loading cartridge 84, including the above-described loading cartridges. Thekit 80 may include apackaging 82 to contain or seal, including hermetically, the components therein. - The present invention, however, is not limited to separately a disposed
stent engaging member 38 and/or aloading cartridge 84. For example, the engagingmember 38 may be disposed at the distal end of theintermediate tubular member 36. In such a case theintermediate tubular member 36 may be formed of a thin polymeric film, for example, but not limited to, polyamide, such as polyamide 6-6 or nylon, PET or PTFE. The film is desirably compliant, so that the funnel is capable of alternatively assuming an open configuration as seen inFIGS. 6-8 for receiving a proximal end ofstent member 38 to be accommodated or contained within the workingchannel 18 of the flexible tubularendoscopic member 12. Desirably, such an attached engagingmember 38 is resilient and tends to assume the open configuration in the relaxed state when free of external stresses. Alternatively, the engagingmember 38 may be pliable, in particular radially distensible, mesh, weave or braid. The engagingmember 38 may be of any reasonable length and/or diameter to permit the loading of thestent members 38 may be in U.S. patent application Ser. No. 11/437,889, entitled “Apparatus And Method For Loading And Delivering A Stent”, attorney docket 792-57, filed May 19, 2006, the contents of which is incorporated herein by reference. The engagingmember 38 may be assembled during operation, for example, two halves of themember 38 may snap or otherwise be engaged around thestent member 38 may be made into a funnel shape, for example, a flat sheet of material rolled into a cone shape around thestent - In one aspect of the present invention, an endoscopic
stent delivery device device endoscope elongate shaft 12 comprising aproximal end 14, adistal end 16, anouter wall portion 31 and a longitudinal workingchannel 18 through theelongate shaft 12 defining aninner wall 30 of theelongate shaft 12; astent distal portion 14 of theinner wall 30; and aninner tubular member 32 slidably disposed within the workingchannel 18 and having astent holding member 34 engaging an interior portion orportions stent stent distal portion 14 of theinner wall 30. Thedevice viewing device 22 disposed at thedistal end 14 of theendoscope device 20 disposed at thedistal end 14 of theendoscope - The
stent holding member 34 may include a tubular band; where the tubular band may partially or completely encompass a portion of theinner tubular member 32. Further, thestent holding member 34 may include elongate, desirably thin, members, which are sometimes referred to as prongs or whiskers that may engage the portions of thestent delivery device - Desirably, the
elongate shaft 12 is proximally slidable for releasing thestent channel 18. Thestent stent stent channel 18 in the radially contacted state. The radiallydistensible stent braided stent 60 and/or a zig-zag stent 26 having a plurality of undulating filament portions, or combinations thereof. The zig-zag stent 26 may further includestruts 58 for interconnecting one undulating filament portion to another undulating filament portion. - Further, a
graft 64, 66 disposed over at least a portion of thestent graft 64, 66 may be selected from the group consisting of a covering 64, a liner 66, a film, a coating and combinations thereof. Desirably, thestent 60 is a braided polymeric stent and thegraft 64, 66 comprises silicone. - Moreover, the
inner tubular member 32 may further include inner andouter telescoping members stent inner telescoping member 32. Theouter telescoping member 36 typically has a larger outer diameter than an outer diameter of theinner telescoping member 32, where exterior wall portions of theouter telescoping member 36 may juxtaposing abut theinner wall 30 of theelongate shaft 12. Further, theouter telescoping member 36 may abut a proximal end of thestent stent - The
device suture thread portion 40 securably attached to a proximal portion of thestent inner tubular member 32 further includes a longitudinally extending channel and further where thesuture thread 42 longitudinally extends through the longitudinal channel of theinner tubular member 32, whereby a pulling force proximally applied on thesuture thread 42 extending through theinner member 32 may proximally move thestent channel 18. Thedevice stent loading member 38 for radially compressing thestent channel 18. - The
device package device device package - In another aspect of the invention, an endoscopic
stent delivery kit kit endoscope elongate shaft 12 comprising aproximal end 14, adistal end 16, anouter wall 31 and a longitudinal workingchannel 18 through theelongate shaft 12 defining aninner wall 30 of the elongate shaft 12: a radiallydistensible stent inner tubular member 32 slidable disposed within the workingchannel 28 and having astent holding member 34 engaging an interior portion orportions stent stent distal portion 14 of theinner wall 30; and astent loading member stent distal portion 14 of the workingchannel 18. Thestent stent stent loading member 44. Alternatively, thestent stent stent loading member 84. Thekit package device endoscope stent inner tubular member 32 and the stent loading member within thepackage - In another aspect of the invention, a method for delivering a
stent bodily lumen 24 or a method of use is provided. The method or use includes providing an endoscopicstent delivery device device endoscope elongate shaft 12 having aproximal end 14, adistal end 16, anouter wall 31 and a longitudinal workingchannel 18 though theelongate shaft 12 defining aninner wall 30 of theelongate shaft 12; astent distal portion 14 of theinner wall 30; and aninner tubular member 32 slidably disposed within the workingchannel 18 and having astent holding member 34 engaging an interior portion orportions stent stent distal portion 14 of theinner wall 30; and sliding theelongate shaft 12 relative to theinner tubular member 32 to release thestent device stent stent delivery device elongate shaft 12 to release thestent delivery device inner tubular member 32 to push thestent delivery device stent delivery device stent distal portion 14 of theinner wall 30 of theendoscope stent stent distal portion 14 of theinner wall 30 of theendoscope - Moreover, some or all of the stent delivery components, such as, but not limited to, the flexible tubular
endoscopic member 12, theintermediate tubular member 36, theinner tubular member 32, thestent engaging member 38, thestent holding member 44, and/or theloading cartridge 84, may be mechanically engageable, such as keyed, threaded and/or lockable together, to permit rotation and/or to prevent unwanted misalignment or mispositioning of thestent tubular members endoscope - The following embodiments or aspects of the invention may be combined in any fashion and combination and be within the scope of the present invention, as follows:
- An endoscopic stent delivery device, comprising: an elongate shaft comprising a proximal end, a distal end, an outer wall and a longitudinal working channel through the elongate shaft defining an inner wall of the elongate shaft; a stent juxtaposingly disposed to a distal portion of the inner wall; and an inner tubular member slidably disposed within the working channel and having a stent holding member engaging an interior portion of the stent for releasably securing the stent to the distal portion of the inner wall.
- The device of embodiment 1, further comprising a viewing device disposed at the distal end of the elongate shaft.
- The device of embodiment 1, further comprising an illuminating device disposed at the distal end of the elongate shaft.
- The device of embodiment 1, wherein the stent holding member comprises a tubular band; wherein the tubular band may partially or completely encompass a portion of the inner tubular member.
- The device of embodiment 1, wherein the elongate shaft is slidable for releasing the stent from the working channel.
- The device of embodiment 1, wherein the stent is a radially distensible stent.
- The device of embodiment 6, wherein the stent has a radially contracted state and a larger radially expanded state, and further wherein the stent is disposed within the working channel in the radially contacted state.
- The device of embodiment 6, wherein the radially distensible stent is a polymeric stent.
- The device of embodiment 6, wherein the radially distensible stent is a self-expanding stent.
- The device of embodiment 1, wherein the stent is a braided stent.
- The device of embodiment 1, wherein the stent is a zig-zag stent comprising a plurality of undulating filament portions.
- The device of embodiment 11, wherein the stent further comprises struts for interconnecting one undulating filament portion to another undulating filament portion.
- The device of embodiment 1, further comprising a graft disposed over at least a portion of the stent.
- The device of embodiment 13, wherein the graft is selected from the group consisting of a covering, a liner, a film, a coating and combinations thereof.
- The device of embodiment 13, wherein the stent is a braided polymeric stent and the graft comprises silicone.
- The device of embodiment 1, wherein the inner tubular member comprises inner and outer telescoping members, and further wherein the stent is disposed over the inner telescoping member.
- The device of
embodiment 16, wherein the outer telescoping member has a larger outer diameter than an outer diameter of the inner telescoping member, and further wherein exterior wall portions of the outer telescoping member juxtaposing abut the inner wall of the elongate shaft. - The device of embodiment 17, wherein the stent is a radially distensible stent having a radially contracted state and a larger radially expanded state, and further wherein the outer telescoping member abuts a proximal end of the stent in the radially contracted state of the stent.
- The device of embodiment 1, further comprising a suture thread having a portion securably attached to a proximal portion of the stent, whereby a pulling force applied on the suture thread moves the stent within the working channel.
- The device of embodiment 19, further comprising a stent loading member for radially compressing the stent into the working channel.
- The device of embodiment 1, further comprising a package for enclosing the device for hermetically sealing the device within the package.
- An endoscopic stent delivery kit, comprising: an elongate shaft comprising a proximal end, a distal end, an outer wall and a longitudinal working channel through the elongate shaft defining an inner wall of the elongate shaft; a radially distensible stent having a radially contracted state and a radially expanded state; and an inner tubular member slidable disposed within the working channel and having a stent holding member engaging an interior portion of the stent for releasably securing the stent to the distal portion of the inner wall.
- The kit of
embodiment 22, further comprising a stent loading member for loading the stent into a distal portion of the working channel. - The kit of
embodiment 22, wherein the stent is in the radially contracted state, and further wherein the stent is disposed within the stent loading member. - The kit of
embodiment 22, wherein the stent is in the radially expanded state. - The kit of embodiment 25, wherein the radially expanded stent is disposed within the stent loading member.
- The kit of
embodiment 22, further comprising a package for enclosing the device for hermetically sealing the endoscope, the stent, the inner tubular member and the stent loading member within the package. - A method for delivering a stent into a bodily lumen, comprising (a.) providing an endoscopic stent delivery device, the device comprising: (i.) an elongate shaft comprising a proximal end, a distal end, an outer wall and a longitudinal working channel through the elongate shaft defining an inner wall of the elongate shaft; (ii.) a stent juxtaposingly disposed to a distal portion of the inner wall; and (iii.) an inner tubular member slidably disposed within the working channel and having a stent holding member engaging an interior portion of the stent for releasably securing the stent to the distal portion of the inner wall; and (b.) sliding the elongate shaft relative to the inner tubular member to release the stent from the device,
- The method of
embodiment 28, wherein the step of providing the endoscopic stent delivery device further comprises: loading the stent within the distal portion of the inner wall of the endoscope. - The method of embodiment 29, further comprising: radially compressing the stent prior to loading the stent within the distal portion of the inner wall of the endoscope.
- While various embodiments of the present invention are specifically illustrated and/or described herein, it will be appreciated that modifications and variations of the present invention may be effected by those skilled in the art without departing from the spirit and intended scope of the invention. Further, any of the embodiments or aspects of the invention as described in the claims or in the specification may be used with one and another without limitation.
Claims (20)
1. An endoscopic stent delivery device, comprising:
an elongate shaft comprising a proximal end, a distal end, an outer wall, a longitudinal working channel through the elongate shaft defining an inner wall of the elongate shaft, and at least one additional channel extending through the elongate shaft from said proximal end to said distal end;
a stent having a proximal end, a distal end, and an inner surface, said stent disposed in a distal portion of the working channel;
an inner tubular member slidably disposed within the working channel, the inner tubular member including a stent holding member, said inner tubular member extending through the stent lumen, wherein said stent holding member directly secures an interior portion of said stent against said inner wall of said working channel of said elongate shaft.
2. The device of claim 1 , wherein the stent holding member includes a hollow tubular band at least partially disposed around said inner tubular member.
3. The device of claim 1 , wherein the stent holding member retains only the proximal end of the stent.
4. The device of claim 1 , wherein the at least one additional channel includes a viewing channel and an illuminating channel extending through said elongate shaft from said proximal end to said distal end, the device further comprising a viewing device extending through said viewing channel and an illuminating device disposed at a distal end of the illuminating channel.
5. The device of claim 1 , wherein the stent is a radially distensible stent, and wherein the radially distensible stent has a radially contracted state and a larger radially expanded state, and further wherein the stent is disposed within the working channel in the radially contracted state.
6. The device of claim 5 , wherein the radially distensible stent is a polymeric stent.
7. The device of claim 1 , wherein the stent is a braided stent.
8. The device of claim 1 , wherein the stent is a zig-zag stent comprising a plurality of undulating filament portions.
9. The device of claim 1 , further comprising a graft disposed over at least a portion of the stent, wherein the graft is selected from the group consisting of a covering, a liner, a film, a coating and combinations thereof.
10. The device of claim 9 , wherein the stent is a braided polymeric stent and the graft comprises silicone.
11. The device of claim 1 , wherein the inner tubular member comprises inner and outer telescoping members, and further wherein the stent is disposed over the inner telescoping member.
12. The device of claim 11 , wherein the outer telescoping member has a larger outer diameter than an outer diameter of the inner telescoping member, and further wherein exterior wall portions of the outer telescoping member are disposed within the working channel.
13. The device of claim 12 , wherein the stent is a radially distensible stent having a radially contracted state and a larger radially expanded state, and further wherein the outer telescoping member abuts a proximal end of the stent in the radially contracted state of the stent.
14. The device of claim 1 , further comprising a suture thread looped radially around a proximal portion of the stent, whereby a pulling force applied on the suture thread moves the stent within the working channel.
15. The device of claim 14 , further comprising a stent loading member for radially compressing the stent into the working channel.
16. The device of claim 1 , further comprising a package for enclosing the device for hermetically sealing the device within the package.
17. The device of claim 1 , further comprising multiple stent holding members axially spaced apart along said inner tubular member.
18. An endoscopic stent delivery kit, comprising:
an elongate shaft comprising a proximal end, a distal end, an outer wall, a longitudinal working channel through the elongate shaft defining an inner wall of the elongate shaft, and at least one additional channel extending through said elongate shaft from said proximal end to said distal end;
a radially distensible stent having a radially contracted state and a radially expanded state;
an inner tubular member slidably disposed within the working channel and having a stent holding member engaging an interior portion of the stent for releasably securing the stent directly against the inner wall of the working channel; and
a stent loading member for loading the stent into a distal portion of the working channel, said stent loading member having a conical geometry, wherein said stent loading member is unattached to said elongated shaft.
19. The kit of claim 18 , said stent loading member is removably attached to distal end of said elongate shaft.
20. The kit of claim 18 , further comprising a package for enclosing the device for hermetically sealing the elongate shaft, the stent, the inner tubular member and the stent loading member within the package.
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US20160143724A1 (en) * | 2014-11-20 | 2016-05-26 | Boston Scientific Scimed, Inc. | Tracheal implant |
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Also Published As
Publication number | Publication date |
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EP2106250B1 (en) | 2020-04-01 |
US9125761B2 (en) | 2015-09-08 |
US20080183272A1 (en) | 2008-07-31 |
EP2106250A1 (en) | 2009-10-07 |
WO2008091409A1 (en) | 2008-07-31 |
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