US20040073139A1 — Cannula for extracting and implanting material

Claim 1

Independent Claim 93 words

1 . A medical device, comprising: a cannula having a length defining a longitudinal axis, an outer diameter, an inner diameter, a proximal end and an inwardly beveled distal tip extending from the outer diameter to the inner diameter, wherein the outer diameter is constant along the length from the proximal end to the distal tip and the inner diameter is constant along the length from the proximal end up to but not including the distal tip, and wherein the distal tip defines a plane at least substantially normal to the longitudinal axis.

Claim 2

Dependent Claim 93 words

1 . A medical device, comprising: a cannula having a length defining a longitudinal axis, an outer diameter, an inner diameter, a proximal end and an inwardly beveled distal tip extending from the outer diameter to the inner diameter, wherein the outer diameter is constant along the length from the proximal end to the distal tip and the inner diameter is constant along the length from the proximal end up to but not including the distal tip, and wherein the distal tip defines a plane at least substantially normal to the longitudinal axis.

Claim 3

Dependent Claim 16 words

2 . The medical device of claim 1 wherein the inwardly beveled distal tip is funnel-shaped.

Claim 4

Dependent Claim 16 words

3 . The medical device of claim 1 wherein the inwardly beveled distal tip is frustroconical-shaped.

Claim 5

Dependent Claim 70 words

4 . A medical device, comprising: a cannula having a proximal end and a distal portion having a proximal edge and a distal edge, wherein the cannula has a constant outer diameter from the proximal end to the distal edge, and wherein the wall thickness is constant from the proximal end to the proximal edge of the distal portion and tapers inwardly from the distal edge to the proximal edge.

Claim 6

Dependent Claim 70 words

4 . A medical device, comprising: a cannula having a proximal end and a distal portion having a proximal edge and a distal edge, wherein the cannula has a constant outer diameter from the proximal end to the distal edge, and wherein the wall thickness is constant from the proximal end to the proximal edge of the distal portion and tapers inwardly from the distal edge to the proximal edge.

Claim 7

Dependent Claim 22 words

5 . The medical device of claim 4 wherein the distal portion defines a space in the shape of a right frustrum.

Claim 8

Dependent Claim 41 words

6 . A medical device, comprising: a cannula comprising a smooth, inviolate inner luminal surface, an outer luminal surface, and an inwardly beveled distal portion having a substantially circular distal edge, wherein the inner luminal and outer luminal surfaces are parallel.

Claim 9

Dependent Claim 41 words

6 . A medical device, comprising: a cannula comprising a smooth, inviolate inner luminal surface, an outer luminal surface, and an inwardly beveled distal portion having a substantially circular distal edge, wherein the inner luminal and outer luminal surfaces are parallel.

Claim 10

Dependent Claim 25 words

7 . The medical device of claim 6 wherein the beveled distal portion defines an angle in the range from about 5° to about 60°.

Claim 11

Dependent Claim 19 words

8 . The medical device of claim 7 wherein the beveled distal portion defines an angle of about 15°.

Claim 12

Dependent Claim 24 words

9 . The medical device of claims 1 , 4 or 6 , further comprising a second cannula configured for slidably receiving the cannula.

Claim 13

Dependent Claim 21 words

10 . The medical device of claim 9 , further comprising a stylet configured for slidable engagement within the second cannula.

Claim 14

Dependent Claim 116 words

11 . A system for carrying out medical procedures at a target site within the body, comprising: a first cannula; a second cannula configured for slidable engagement within said second cannula and having a length defining a longitudinal axis, an outer diameter, an inner diameter, a proximal end and an inwardly beveled distal tip, wherein the outer diameter is constant along the length from the proximal end to the distal tip and the inner diameter is constant along the length from the proximal end up to but not including the distal tip, and wherein the distal tip defines a plane normal to the longitudinal axis; and a stylet configured for slidable engagement within the first cannula.

Claim 15

Dependent Claim 116 words

11 . A system for carrying out medical procedures at a target site within the body, comprising: a first cannula; a second cannula configured for slidable engagement within said second cannula and having a length defining a longitudinal axis, an outer diameter, an inner diameter, a proximal end and an inwardly beveled distal tip, wherein the outer diameter is constant along the length from the proximal end to the distal tip and the inner diameter is constant along the length from the proximal end up to but not including the distal tip, and wherein the distal tip defines a plane normal to the longitudinal axis; and a stylet configured for slidable engagement within the first cannula.

Claim 16

Dependent Claim 22 words

12 . The system of claim 11 wherein the first cannula is configured for delivering a flowable material to within the body.

Claim 17

Dependent Claim 118 words

13 . A system for carrying out medical procedures at a target site within the body, comprising: an outer cannula having a handle at a proximal end and configured at a distal end for penetration into the target site; an inner cannula configured for slidable engagement within the outer cannula and having a handle at a proximal end configured for locking engagement with the handle of the outer cannula and having an inwardly tapered distal tip defining a plane normal to the longitudinal axis of the inner cannula; and a stylet configured for slidable engagement within the outer cannula and having a handle at a proximal end configured for locking engagement with the handle of the outer cannula.

Claim 18

Dependent Claim 118 words

13 . A system for carrying out medical procedures at a target site within the body, comprising: an outer cannula having a handle at a proximal end and configured at a distal end for penetration into the target site; an inner cannula configured for slidable engagement within the outer cannula and having a handle at a proximal end configured for locking engagement with the handle of the outer cannula and having an inwardly tapered distal tip defining a plane normal to the longitudinal axis of the inner cannula; and a stylet configured for slidable engagement within the outer cannula and having a handle at a proximal end configured for locking engagement with the handle of the outer cannula.

Claim 19

Dependent Claim 28 words

14 . The system of claim 13 wherein the outer cannula handle is configured for fluid engagement with a device for the controlled injection of a filler material.

Claim 20

Dependent Claim 79 words

15 . A medical procedure to be performed on a body, comprising: providing the system of claim 13; slidably engaging the stylet within the outer cannula; penetrating tissue with said assembled stylet and outer cannula and advancing the assembling to a target site; removing the stylet form the outer cannula and slidably engaging the inner cannula within the outer cannula; and extracting tissue from the target site with the inner cannula thereby defining a space with the target site.

Claim 21

Dependent Claim 18 words

16 . The medical procedure of claim 15 , further comprising: repeating the extracting of tissue as necessary;

Claim 22

Dependent Claim 22 words

17 . The medical procedure of claim 15 , further comprising: filling the space within the target site with a flowable material.

Cannula for extracting and implanting material

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