IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0435724
(2009-05-05)
|
등록번호 |
US-8460327
(2013-06-11)
|
발명자
/ 주소 |
- Mark, Joseph L.
- Dougherty, Brian
|
출원인 / 주소 |
|
대리인 / 주소 |
Rader, Fishman & Grauer, PLLC
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
41 |
초록
▼
A tissue cutting device that is especially suited for neurosurgical applications is disclosed and described. The device includes a handpiece and an outer cannula in which a reciprocating inner cannula is disposed. The inner cannula includes a hinge between a body section and a cutting section that a
A tissue cutting device that is especially suited for neurosurgical applications is disclosed and described. The device includes a handpiece and an outer cannula in which a reciprocating inner cannula is disposed. The inner cannula includes a hinge between a body section and a cutting section that allows the cutting section to pivot when the inner cannula reciprocates within the outer cannula. The inner cannula also includes a bending portion between the proximal end of the inner cannula and the hinge which is bendable with the outer cannula. The device is particularly suited for accessing neurosurgical sites that are not accessible along a linear path.
대표청구항
▼
1. A tissue removal system, comprising: a tissue removal device, including: a handpiece;an outer cannula fixedly connected to the handpiece and having an outer cannula lumen, a proximal end, a distal end, and an outer cannula opening adjacent the distal end, wherein the opening defines a cutting edg
1. A tissue removal system, comprising: a tissue removal device, including: a handpiece;an outer cannula fixedly connected to the handpiece and having an outer cannula lumen, a proximal end, a distal end, and an outer cannula opening adjacent the distal end, wherein the opening defines a cutting edge for severing tissue; andan inner cannula disposed in the outer cannula lumen and reciprocable within the outer cannula lumen, the inner cannula having a hollow inner cannula lumen, a proximal end, an open distal end, a cutting edge at the distal end, a bending portion, and a living hinge wherein the bending portion is located between the inner cannula proximal end and the hinge, and wherein the open distal end of the inner cannula is pivotable about the hinge when the inner cannula is advanced distally within the outer cannula lumen such that the cutter edge at the distal end of the inner cannula pivots toward the cutting edge of the outer cannula; anda tube bender comprising a generally linear outer cannula retainer and a generally curved tube bending surface proximal of the outer cannula retainer, wherein the outer cannula retainer includes a channel, and the outer cannula of the tissue cutting device is insertable within the outer cannula retainer channel; wherein the tube bending surface defines a length that is substantially equal to the length of an inner cannula bending portion. 2. The tissue removal system of claim 1, wherein the tube bending surface defines a length along the tube bending surface, and the length is substantially equal to the length of an inner cannula bending portion. 3. The tissue removal system of claim 1, wherein the tube bender comprises a stop surface spaced apart from the distal end of the outer cannula retainer in the tube bender distal direction. 4. The tissue removal system of claim 1, wherein an inner cannula bending portion comprises a section of reduced inner cannula surface area per unit length along a length of the inner cannula. 5. The tissue removal system of claim 1, wherein the bending portion comprises two walls spaced apart from one another. 6. The tissue removal system of claim 5, wherein the hinge has a pivot axis, and the two walls are spaced apart from one another in a direction perpendicular to the pivot axis. 7. The tissue removal system of claim 5, wherein the hinge has a pivot axis, and the two walls are spaced apart from one another in a direction parallel to the pivot axis. 8. The tissue removal system of claim 5, wherein the two walls are spaced apart in a direction that is angled with respect to the direction of the pivot axis. 9. The tissue removal system of claim 5, wherein the two walls are partially-cylindrical. 10. The tissue removal system of claim 5, wherein the two walls have respective cross-sectional arc lengths, and the cross-sectional arc lengths are equal to one another. 11. The tissue removal system of claim 1, wherein the bending portion comprises a single partially cylindrical wall. 12. The tissue removal system of claim 1, wherein the bending portion has a distal end, and the bending portion distal end is spaced apart from the living hinge in the proximal direction. 13. The tissue removal system of claim 1, wherein the bending portion has a length that is from about 65 percent to about 90 percent of the inner cannula length. 14. The tissue removal system of claim 1, wherein the outer cannula is curved, and the inner cannula is curved along the bending portion. 15. The tissue removal system of claim 1, wherein the inner cannula reciprocates within the outer cannula between a proximal position and a distal position at a rate of at least about 1,000 reciprocations per minute. 16. A method of shaping the outer cannula and the inner cannula of the tissue cutting device of the tissue cutting system of claim 1, the method comprising: inserting the outer cannula of the tissue cutting device into the outer cannula retainer such that a first portion of the outer cannula is disposed in the outer cannula retainer and a second portion of the outer cannula projects away from the outer cannula retainer; andmoving the second portion of the outer cannula toward the tube bending surface. 17. The method of claim 16, further comprising engaging the second portion of the outer cannula with the tube bending surface to impart a shape to the outer cannula that is substantially similar to the shape of the tube bending surface. 18. A method for performing a neurosurgical procedure, comprising: providing a tissue removal device, the tissue removal device comprising: a handpiece,a curved outer cannula having an outer cannula lumen, a proximal end, a distal end, and an outer cannula opening adjacent the distal end, wherein the opening defines a cutting edge for severing tissue, andan inner cannula disposed in the outer cannula lumen and reciprocable within the outer cannula lumen, the inner cannula having an inner cannula lumen, a proximal end, an open distal end, a cutting edge at the distal end, a curved bending portion, the bending portion comprises a section of reduced inner cannula surface area per unit length along a length of the inner cannula;providing a tube bender comprising a generally linear outer cannula retainer and a generally curved tube bending surface proximal of the outer cannula retainer, wherein the outer cannula retainer includes a channel, wherein the tube bender comprises a stop surface spaced apart from the distal end of the outer cannula retainer in the tube bender distal direction;inserting the outer cannula of the tissue cutting device into the outer cannula retainer channel;limiting travel of the outer cannula of the tissue cutting device with respect to the tube bender using the stop surface;reciprocating the inner cannula within the curved outer cannula lumen between a proximal position and a distal position, such that when the inner cannula is in the proximal position, a target tissue is received in the outer cannula opening, and when the inner cannula is in the distal position, the cutting section pivots and the received target tissue is severed from surrounding tissue; and aspirating the severed samples through the inner cannula lumen. 19. The method of claim 18, wherein the bending portion comprises two walls spaced apart from one another. 20. The method of claim 19, wherein the hinge has a pivot axis, and the two walls are spaced apart from one another in a direction perpendicular to the pivot axis. 21. The method of claim 19, wherein the hinge has a pivot axis, and the two walls are spaced apart from one another in a direction parallel to the pivot axis. 22. The method of claim 19, wherein the two walls are spaced apart in a direction that is angled with respect to the pivot axis. 23. The method of claim 19, wherein the two walls are partially-cylindrical. 24. The method of claim 19, wherein the two walls have respective cross-sectional arc lengths, and the cross-sectional arc lengths are equal to one another. 25. The method of claim 18, wherein the bending portion comprises a single partially-cylindrical wall. 26. The method of claim 18, wherein the bending portion has a distal end, and the bending portion distal end is spaced apart from a living hinge in the proximal direction. 27. The method of claim 18, wherein the bending portion has a length that is from about 65 percent to about 90 percent of the inner cannula length. 28. The method of claim 18, wherein the outer cannula is curved, and the inner cannula is curved along the bending portion. 29. The method of claim 18, wherein the target tissue comprises a tumor. 30. The method of claim 18, wherein the target tissue comprises a lesion. 31. The method of claim 18, wherein the method is an open surgical procedure. 32. The method of claim 18, wherein the step of reciprocating the inner cannula within the curved outer cannula lumen between a proximal position and a distal position comprises reciprocating the inner cannula at a rate that is at least about 1,000 reciprocations per minute. 33. The tissue removal system of claim 1, wherein the inner cannula generally conforms to the shape of the outer cannula along an outer cannula axis extending through the outer cannula, such that the inner cannula is disposed along an inner cannula axis that is collinear with the outer cannula axis. 34. A tissue removal system, comprising: a tissue removal device, including: a handpiece;an outer cannula fixedly connected to the handpiece and having an outer cannula lumen, a proximal end, a distal end, and an outer cannula opening adjacent the distal end, wherein the opening defines a cutting edge for severing tissue; andan inner cannula disposed in the outer cannula lumen and reciprocable within the outer cannula lumen, the inner cannula having a hollow inner cannula lumen, a proximal end, an open distal end, a cutting edge at the distal end, a bending portion, and a living hinge wherein the bending portion is located between the inner cannula proximal end and the hinge, and wherein the open distal end of the inner cannula is pivotable about the hinge when the inner cannula is advanced distally within the outer cannula lumen such that the cutter edge at the distal end of the inner cannula pivots toward the cutting edge of the outer cannula; anda tube bender defined by a proximal end and a distal end, the tube bender comprising a generally linear outer cannula retainer and a generally curved tube bending surface proximal of the outer cannula retainer, wherein the outer cannula retainer includes a channel, and the outer cannula of the tissue cutting device is insertable within the outer cannula retainer channel, the retainer having a proximal end and a distal end, wherein the tube bender further comprises a recess between the distal end of the tube bender and the distal end of the retainer. 35. A method for preparing a surgical device for a neurosurgical procedure, comprising: providing a tissue removal device, the tissue removal device comprising: a handpiece,an outer cannula having an outer cannula lumen, a proximal end, a distal end, and an outer cannula opening adjacent the distal end, wherein the opening defines a cutting edge for severing tissue, andan inner cannula disposed in the outer cannula lumen and reciprocable within the outer cannula lumen, the inner cannula having a hollow inner cannula lumen, a proximal end, an open distal end, a cutting edge at the distal end, a selectively curveable bending portion, the bending portion comprises a section of reduced inner cannula surface area per unit length along a length of the inner cannula; anddeforming the outer cannula and the inner cannula to a desired shape such that the outer cannula and inner cannula are not disposed along a linear axis; but that the outer cannula and the inner cannula are disposed along a common axis. 36. The method of claim 35, wherein the outer cannula and inner cannula are deformed simultaneously. 37. The method of claim 35, wherein the outer cannula and inner cannula are manually deformed without the aid of an external bending device. 38. The method of claim 35, further comprising providing a tube bender, and wherein the outer cannula and inner cannula are inserted into the tube bender to deform the outer cannula and inner cannula simultaneously. 39. The method of claim 35, wherein once the outer cannula and inner cannula are deformed to the desired shape, the desired shape is maintained without requiring a support mechanism.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.