WO2004000127A1 - Dual outside diameter cannula for insertion into bone - Google Patents
Dual outside diameter cannula for insertion into bone Download PDFInfo
- Publication number
- WO2004000127A1 WO2004000127A1 PCT/US2003/019138 US0319138W WO2004000127A1 WO 2004000127 A1 WO2004000127 A1 WO 2004000127A1 US 0319138 W US0319138 W US 0319138W WO 2004000127 A1 WO2004000127 A1 WO 2004000127A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- section
- cannula
- distal
- outer diameter
- proximal
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
- A61B10/025—Pointed or sharp biopsy instruments for taking bone, bone marrow or cartilage samples
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
- A61B10/025—Pointed or sharp biopsy instruments for taking bone, bone marrow or cartilage samples
- A61B2010/0258—Marrow samples
Definitions
- Various medical procedures require a physician to obtain a sample of a patient's bone or penetrate to the bone marrow cavity to extract bone, bone marrow or bone marrow cavity fluids. Examples include diagnostic tests and determining the suitability of the patient as a transplant donor.
- the procedures require the physician to use a sharpened instrument to penetrate the hard, outer layer of the bone.
- One type of sharpened instrument includes a stylet fitted within a cannula.
- the procedures require the instrument to have a combination of attributes including rigidity to prevent bending and breaking while being inserted into the bone, and be of a minimum size to prevent unnecessary damage to the bone and surrounding tissue.
- Prior art instruments have been designed to be constructed of a flexible material to be inserted within soft tissue, veins, and arteries to access specific areas within the patient. These devices are not applicable to penetrating bone because the flexible construction does not have the necessary rigidity to penetrate through the hard outer layer of the bone.
- biopsy needles are constructed of a rigid material for penetrating into the bone. These needles have a tapered tip to facilitate insertion into the bone and a constant outer diameter extending along the length. The outer diameter is sized such that the device has adequate rigidity and strength to be inserted into the bone without bending or flexing. However, the enlarged size may result in unnecessary damage to the bone and the surrounding tissue.
- Summary The present invention is directed to a cannula for insertion into bone.
- the cannula includes a distal section having a first outer diameter and a proximal section having an enlarged outer diameter. The sizing is important because the reduced size of the distal section allows for penetrating into the bone without causing unnecessary damage.
- the enlarged proximal section allows for support to prevent bending when the distal end is inserted into the bone.
- the distal section has a first wall thickness.
- the proximal section has a larger wall thickness to further prevent the cannula from bending when in use.
- An intermediate section may be positioned between the distal section and the proximal section.
- the intermediate section may have a tapered configuration such that the outer diameter tapers from the size of the proximal outer diameter to the size of the distal outer diameter.
- a tip is positioned on the end of the distal section to facilitate penetration into the bone.
- the tip may be tapered, and may include a sharpened edge.
- the cannula In use, the cannula is handled such that the distal end penetrates into the bone.
- the sections of the cannula having the larger diameter do not penetrate the bone.
- the distal section includes a length with a constant diameter. Increased penetration into the bone results in a longer opening, without an increase in the diameter of the opening within the bone.
- Figure 1 is a perspective view illustrating one embodiment of a cannula constructed in accordance with the present invention
- Figure 2 is a partial perspective view of one embodiment of a cannula with a stylet extending outward from the distal end in accordance with the present invention
- Figure 3 is a cross-sectional view of the cannula of Figure 1 cut along line 3 — 3;
- Figure 4 is a cross-sectional view of the distal section of Figure 3 cut along line 4 - 4;
- Figure 5 is a cross-sectional view of the proximal section of Figure 3 cut along line 5—5;
- Figure 6 is a cross-sectional view of an alternative embodiment of the present invention illustrating the cannula constructed of different materials
- Figure 7 is a side view illustrating the cannula nearing insertion into the patient in accordance with one embodiment of the present invention.
- Figure 8 is a side view illustrating the cannula nearing insertion into the bone in accordance with one embodiment of the present invention.
- Figure 9 is a side view illustrating the distal section of the cannula inserted within the bone with the intermediate section and the proximal section to the exterior of the bone in accordance with one embodiment of the present invention.
- Cannula 10 comprises a distal section 20, a proximal section 40, and an intermediate section 30 positioned there between.
- the distal section 20 has a smaller outer diameter than the proximal section 40. The smaller outer diameter assists in inserting the distal section 20 into the bone.
- the proximal section 40 has a larger wall thickness than the distal section 20 to give rigidity and strength to prevent bending or flexing during insertion.
- the distal section 20 includes a distal end 26 having an opening 28 through which a stylet 60 extends.
- the distal section 20 has a length L which may have a variety of sizes depending upon the application. In one embodiment, the length L of the distal section 20 is about 1.0 inch.
- the outer diameter da ( Figure 4) over the length L is substantially constant. In one embodiment, the distal end is 11 gauge and has an outer diameter d of about 0.120 inches.
- the wall thickness t d of the distal section 20 is illustrated in Figure 4. Wall thickness t d may vary depending upon the application. In one embodiment, wall thickness t d is about 0.027 inches.
- the wall thickness t may be constant over the length L, or may vary. In one embodiment illustrated in Figure 3, wall thickness t d is substantially constant over the length L.
- wall thickness t d gradually increases over the length L with the smallest thickness adjacent the distal end 26 and the largest thickness adjacent the intermediate section 30.
- An inwardly tapered tip 22 may be positioned at the end of the distal section 20 adjacent to the opening 28. Tapered tip 22 may include a sharpened edge to facilitate insertion of the cannula 10 into the patient.
- Intermediate section 30 is positioned between the distal section 20 and proximal section 40.
- Intermediate section 30 has a tapering outer diameter that ranges in size between the outer diameter of the proximal section 40 to the outer diameter of the distal section 20.
- the intermediate section tapers from an outer diameter of about 0.165 inches to about 0.120 inches.
- the amount of taper and length may vary depending upon the application. In one embodiment as illustrated in Figure 2, the taper angle ⁇ is about 10°.
- the wall thickness of the intermediate section varies across the length in a gradual manner from the smallest wall thickness adjacent to the distal section 20 and the largest adjacent to the proximal section 40.
- the proximal section 40 has a larger wall thickness than the distal section 20.
- the additional thickness increases the rigidity of the proximal section 40 to reduce flexing and bending during insertion of the cannula 10 into the bone.
- the wall thickness t p of the proximal section 40 may be within a wide range depending upon the application. In one embodiment, the wall thickness t p is about 0.072 inches.
- the wall thickness t p may be constant over the length of the proximal section 40 as illustrated in Figure 3. In another embodiment, the wall thickness t p may vary along the length. In one embodiment, the wall thickness is constant over the distal, intermediate, and proximal sections.
- Proximal section 40 has a larger outer diameter d p ( Figure 5) than the outer diameter d d of the distal section 20.
- the outer diameter d p is about 0.165 inches.
- the outer diameter d p may be constant over the length of the proximal section 40 as illustrated in Figure 3. In another embodiment, the outer diameter d p varies over the length.
- the cannula 10 includes a lumen 50 extending the length.
- the lumen 50 is sized to receive a stylet 60 that extends the length of the cannula 10 and through the opening 28 in the distal end 26.
- an inner diameter d; of the lumen 50 is substantially constant the entire length of the cannula 10.
- the inner diameter is about 0.093 throughout the length of the cannula 10.
- the inner diameter dj may vary over the length.
- the inner diameter d may have a variety of sizes depending upon the application.
- Cannula 10 may be constructed in a number of different manners. In one embodiment, cannula 10 is constructed from a single piece of material, such as stainless steel.
- the cannula 10 may further be constructed of any metal that offers rigidity for inserting the cannula 10 into the bone.
- cannula 10 is constructed of titanium to be compatible with MRI equipment.
- cannula 10 is constructed of outer and inner materials 70, 72.
- the outer material 70 forms an outer shell around the inner material 72.
- the outer material 70 has a rigid construction to prevent bending or flexing of the cannula 10 during insertion into the bone.
- Inner material 72 may further be constructed to add rigidity.
- a stylet 60 may be inserted within the lumen 50 as illustrated in Figure 2. The elongated stylet 60 extends the length of and is slideably received within the lumen 50.
- the stylet 60 extends through the opening 28 at the distal end 26 and provides a smooth external profile between the cannula 10 and stylet 60 to facilitate penetration into the bone.
- Stylet 60 includes a cutting edge 62 at the distal end. Cutting edge 62 that may have a variety of orientations and dimensions to facilitate bone penetration.
- Figures 7, 8, and 9 illustrate the use of the cannula 10.
- Figure 7 illustrates the cannula 10 positioned adjacent to the patients skin 100, tissue 110, and bone 120.
- the cannula 10 is inserted through the skin 100 and tissue 110.
- the skin 100 and tissue 110 may be resected prior to the use of the cannula 10 such that only the bone 120 is contacted.
- Stylet 60 is inserted within the cannula 10 with the cutting edge 62 protruding through the opening 28 for facilitating insertion.
- Figure 8 illustrates a stage during the insertion process.
- the distal section 20 has penetrated through the skin 100 and into the tissue 110.
- the intermediate section 30 and proximal section 40 have yet to enter into skin 100.
- Figure 9 illustrates the cannula 10 with stylet with cutting edge 62 inserted into the bone 120.
- the cannula 10 has been inserted a distance into the patient such that the distal section 20 is the only portion of the cannula 10 penetrating into the bone 120.
- Neither the intermediate portion 30 nor proximal section 40 penetrate the bone 120.
- the intermediate portion 30 and proximal section 40 penetrate through the skin 100 and into the tissue 110.
- the smaller outer diameter d d of the distal section 20 prevents unnecessary damage to the bone that could occur if the intermediate section 30 or proximal section 40 were inserted.
- the increased wall thickness t p of the proximal section 40 prevents the cannula 10 from bending such that the force applied to the cannula 10 is directed to penetration into the bone 120.
- stylet 60 also penetrates into the bone 120 as it extends from the opening 28 in the distal end 26. In another embodiment, there is no stylet 60 and only the cannula 10 is inserted into the bone 120.
- the cross-section shape of the distal 20, intermediate 30, and proximal 40 sections may have a variety of different configurations. In one embodiment, each section is substantially circular. In one embodiment, the sections are rectangular. In another embodiment, sections are oval. In another embodiment, sections are triangular. The different sections may have different cross-sectional shapes. In one embodiment, distal 20 and proximal 40 sections have a first cross-sectional shape, and the intermediate section 30 has a second, different cross-sectional shape.
- the term "diameter” is used herein to mean the size of the device by a straight line passing through a center of the cross-sectional shape. The term “diameter” is used to include circles, as well as other shapes.
- a cannula 10 includes a distal section 20 having a length of about 1.0 inches, an outer diameter of about 0.120 inches, and an inner diameter of about 0.093 inches.
- the proximal section 40 has an outer diameter of about 0.165 inches, an inner diameter of about 0.093 inches.
- the intermediate section has a tapered outer diameter that ranges from a first edge of about 0.165 inches to a second edge of about 0.120 inches.
- the intermediate section 30 tapers at about a 10° angle relative to the proximal section 40.
- a constant inner diameter lumen 50 of about 0.093 inches extend the entire length of the cannula.
- the distal section 20, intermediate section 30, and proximal section 40 have a combined length of about 5.0 inches.
- Proximal section 40 may have a variety of lengths depending upon the application.
- a handle or other type of holding device may be mounted to the proximal section 40 for handling by the physician.
- the handles are well known in the art and are not considered part of this invention.
- the present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004515860A JP2005529712A (en) | 2002-06-20 | 2003-06-17 | Two-stage outer diameter cannula for insertion into bone |
AU2003279174A AU2003279174A1 (en) | 2002-06-20 | 2003-06-17 | Dual outside diameter cannula for insertion into bone |
CA002489811A CA2489811A1 (en) | 2002-06-20 | 2003-06-17 | Dual outside diameter cannula for insertion into bone |
EP03742038A EP1515643A1 (en) | 2002-06-20 | 2003-06-17 | Dual outside diameter cannula for insertion into bone |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/176,223 US20030236506A1 (en) | 2002-06-20 | 2002-06-20 | Dual outside diameter cannula for insertion into bone |
US10/176,223 | 2002-06-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004000127A1 true WO2004000127A1 (en) | 2003-12-31 |
Family
ID=29734092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2003/019138 WO2004000127A1 (en) | 2002-06-20 | 2003-06-17 | Dual outside diameter cannula for insertion into bone |
Country Status (6)
Country | Link |
---|---|
US (1) | US20030236506A1 (en) |
EP (1) | EP1515643A1 (en) |
JP (1) | JP2005529712A (en) |
AU (1) | AU2003279174A1 (en) |
CA (1) | CA2489811A1 (en) |
WO (1) | WO2004000127A1 (en) |
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US20040073139A1 (en) * | 2002-10-11 | 2004-04-15 | Hirsch Joshua A. | Cannula for extracting and implanting material |
US7935122B2 (en) * | 2004-12-23 | 2011-05-03 | Arthrocare Corporation | Cannula having asymmetrically-shaped threads |
US20060206055A1 (en) * | 2005-03-08 | 2006-09-14 | Ice Dennis A | Short-tapered epidural injection needle (ice needle) |
US7892207B2 (en) * | 2006-04-27 | 2011-02-22 | Warsaw Orthopedic, Inc. | Dilating stylet and cannula |
US7905884B2 (en) * | 2006-04-27 | 2011-03-15 | Warsaw Orthopedic, Inc. | Method for use of dilating stylet and cannula |
US7842038B2 (en) * | 2006-05-04 | 2010-11-30 | Warsaw Orthopedic, Inc. | Method for using retractable stylet and cannula combination to form an opening in bone |
US8167899B2 (en) * | 2006-05-04 | 2012-05-01 | Warsaw Orthopedic, Inc. | Retractable stylet and cannula combination |
US20080154304A1 (en) * | 2006-12-21 | 2008-06-26 | Arthrocare Corporation | System and method for accessing a tissue structure |
JP4576587B2 (en) * | 2007-01-23 | 2010-11-10 | 株式会社Jimro | Bone marrow drill |
US20090131827A1 (en) * | 2007-11-21 | 2009-05-21 | Stemcor Systems, Inc. | Apparatus and methods for tissue disruption |
US20090234322A1 (en) * | 2008-03-12 | 2009-09-17 | Ultradent Products, Inc. | Method of dental tissue injection using an array of micro-needles |
US20100023065A1 (en) * | 2008-07-25 | 2010-01-28 | Welch Andrea M | Tissue access device with alignment guide and methods of use |
US8603124B1 (en) | 2010-11-23 | 2013-12-10 | Robert Hatch | Modified surgical scalpel with polyurethane mated sheath for ultrasound assisted carpal tunnel surgery |
US9414815B2 (en) | 2013-03-15 | 2016-08-16 | Vidacare LLC | Intraosseous needle sets and kits |
US9925068B2 (en) | 2014-05-30 | 2018-03-27 | Treace Medical Concepts, Inc. | Bone harvester and bone marrow removal system and method |
IL247684A0 (en) * | 2016-09-07 | 2017-01-31 | Waismed Ltd | Cannula for use in intraosseous injections |
AU2018234510B2 (en) * | 2017-03-16 | 2020-07-30 | Boston Scientific Scimed, Inc. | Biopsy needle for accessing peripheral lung nodules |
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- 2002-06-20 US US10/176,223 patent/US20030236506A1/en not_active Abandoned
-
2003
- 2003-06-17 CA CA002489811A patent/CA2489811A1/en not_active Abandoned
- 2003-06-17 AU AU2003279174A patent/AU2003279174A1/en not_active Abandoned
- 2003-06-17 JP JP2004515860A patent/JP2005529712A/en not_active Withdrawn
- 2003-06-17 WO PCT/US2003/019138 patent/WO2004000127A1/en not_active Application Discontinuation
- 2003-06-17 EP EP03742038A patent/EP1515643A1/en not_active Withdrawn
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US20020042581A1 (en) * | 1999-03-19 | 2002-04-11 | Cervi Paul Laurence | Biopsy needle |
Also Published As
Publication number | Publication date |
---|---|
JP2005529712A (en) | 2005-10-06 |
EP1515643A1 (en) | 2005-03-23 |
CA2489811A1 (en) | 2003-12-31 |
US20030236506A1 (en) | 2003-12-25 |
AU2003279174A1 (en) | 2004-01-06 |
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