IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0404407
(2009-03-16)
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등록번호 |
US-8496599
(2013-07-30)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
Rader, Fishman & Grauer, PLLC
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인용정보 |
피인용 횟수 :
0 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. A tissue collector is also provided and is in fluid communication with the lumen of the inner cannula. The outer and inner cannulae are offset from the motor and drive assembly, and the center of gravity of the device is in the forward part of the device, providing an ergonomic design that is particularly suited for neurosurgical applications.
대표청구항
▼
1. A tissue removal device, comprising: a handpiece having a housing, the housing having a longitudinal axis, a proximal end including a proximal-most portion, a distal end, and a midpoint along the longitudinal axis, wherein the proximal-most portion of the housing includes one of a cable port and
1. A tissue removal device, comprising: a handpiece having a housing, the housing having a longitudinal axis, a proximal end including a proximal-most portion, a distal end, and a midpoint along the longitudinal axis, wherein the proximal-most portion of the housing includes one of a cable port and a hose connector;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 adjacent the distal end defines a cutting edge for severing tissue;an inner cannula disposed in the outer cannula lumen and reciprocable within the outer cannula lumen, the inner cannula having a longitudinal axis, an inner cannula lumen, a proximal end, an open distal end, a cutting edge at the distal end, a living hinge, a cutting section, and a body section, with the hinge being located between the cutting section and the body section, wherein the cutting section is pivotable when the inner cannula reciprocates within the outer cannula lumen;a tissue collector in fluid communication with the inner cannula lumen; anda motor disposed in the handpiece;wherein the motor is positioned proximal of the housing midpoint along the direction of the housing longitudinal axis. 2. The tissue removal device of claim 1, wherein the housing is a lower housing, the handpiece further comprises an upper housing connected to the lower housing, and the outer cannula is partially disposed in the upper housing and projects away from the upper housing along the direction of the inner cannula longitudinal axis. 3. The tissue removal device of claim 1, wherein the housing longitudinal axis is spaced apart from the inner cannula longitudinal axis in a direction that is substantially perpendicular to the inner cannula longitudinal axis. 4. The tissue removal device of claim 1, wherein the housing longitudinal axis is spaced apart from and substantially parallel to the inner cannula longitudinal axis. 5. The tissue removal device of claim 1, wherein the tissue collector has a longitudinal axis, and the tissue collector longitudinal axis is substantially collinear with the inner cannula longitudinal axis. 6. The tissue removal device of claim 1, further comprising a drive assembly disposed in the housing, wherein the drive assembly is located between the midpoint of the housing and the distal end of the housing. 7. The tissue removal device of claim 6, wherein the drive assembly comprises a cam, and the rotation of the motor causes the cam to rotate. 8. The tissue removal device of claim 7, wherein the cam has a length, a surface, a continuous channel defined in the surface, two cam channel apexes that are spaced apart from one another along the length of the cam, and a longitudinal axis, and the cam longitudinal axis is substantially parallel to and spaced apart from the inner cannula longitudinal axis. 9. The tissue removal device of claim 8, further comprising a cam follower connected to the inner cannula, wherein the cam follower is disposed in the cam channel and moves along the channel when the cam rotates about the cam longitudinal axis. 10. The tissue removal device of claim 1, wherein the outer cannula is rotatable about the inner cannula longitudinal axis such that rotation of the outer cannula about the inner cannula longitudinal axis with respect to the handpiece causes the inner cannula to rotate about the inner cannula longitudinal axis with respect to the handpiece while maintaining a fixed circumferential orientation between the outer cannula opening and the inner cannula. 11. The tissue removal device of claim 10, wherein the inner cannula has a radial direction, and when the inner cannula and the outer cannula are in the fixed circumferential orientation, the hinge is spaced apart from the outer cannula opening in the radial direction. 12. The tissue removal device of claim 1, further comprising an inner sleeve disposed about the outer cannula and a rotation wheel connected to the inner sleeve and the inner cannula, such that rotation of the rotation wheel causes the outer cannula to rotate about the inner cannula longitudinal axis. 13. The tissue removal device of claim 12, wherein the housing is a lower housing, the handpiece further comprises an upper housing connected to the lower housing, and the inner sleeve is disposed in the upper housing. 14. The tissue removal device of claim 13, wherein the rotation wheel is partially disposed in the upper housing such that a user engagement surface of the rotation wheel projects away from the upper housing. 15. The tissue removal device of claim 1, wherein an entire portion of the motor is positioned proximal of the housing midpoint along the direction of the housing longitudinal axis. 16. The tissue removal device of claim 1, wherein the housing longitudinal axis is spaced away from the proximal end of the inner cannula in a direction perpendicular to the inner cannula longitudinal axis.
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