Tissue extraction devices and methods

Patent metadata

Field	Value
Publication number	US-11819263-B2
Application number	US-202217569850-A
Country	US
Kind code	B2
Filing date	Jan 6, 2022
Priority date	Jun 24, 2011
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

The tissue cutting device comprises an elongated assembly including both an outer sleeve and an inner sleeve. The outer sleeve has a tissue-receiving window, and the inner sleeve has a distal end which cuts tissue as the inner sleeve is advanced past the window. The tissue is received into a lumen of the inner sleeve, and the inner sleeve lumen is typically enlarged in a proximal direction to reduce the tendency of resected tissue to lodge therein. The tissue displacement member is optionally provided at a distal end of the outer sleeve to further aid in dislodging tissue which becomes captured in a distal end of the inner sleeve of the lumen.

First claim

What is claimed is:

1. A tissue extraction device, comprising:
an outer sleeve including an outer sleeve lumen extending therein, wherein the outer sleeve includes a side-facing window through a wall of the outer sleeve and communicating with the outer sleeve lumen; and
an inner sleeve disposed within the outer sleeve lumen and configured to axially reciprocate relative to the outer sleeve between a window-open position and a window-closed position, the window-open position and the window-closed position defining a total stroke length of the inner sleeve;
wherein in the window-closed position, the inner sleeve extends distal of the side-facing window by at least a first distance, the first distance being at least 5% of the total stroke length.

2. The tissue extraction device of claim 1 , further comprising:
a closed distal tip member fixedly attached to a distal end of the outer sleeve; and
a projecting element extending proximally from the closed distal tip member.

3. The tissue extraction device of claim 2 , wherein the closed distal tip member is disposed a first axial length distal of the side-facing window;
wherein the projecting element extends a second axial length proximally from the closed distal tip member that is greater than the first axial length.

4. The tissue extraction device of claim 1 , wherein the inner sleeve defines a tissue extraction lumen having a proximal portion extending from a proximal end to a distal region and a distal portion extending from the distal region to a distal end of the inner sleeve, wherein the proximal portion of the tissue extraction lumen has a first cross-sectional area and the distal portion of the tissue extraction lumen has a second cross-sectional area less than the first cross-sectional area.

5. The tissue extraction device of claim 4 , wherein the second cross-sectional area is less than 95% of the first cross-sectional area.

6. The tissue extraction device of claim 4 , wherein the second cross-sectional area is less than 90% of the first cross-sectional area.

7. The tissue extraction device of claim 4 , wherein the second cross-sectional area is less than 85% of the first cross-sectional area.

8. The tissue extraction device of claim 4 , wherein the second cross-sectional area is less than 80% of the first cross-sectional area.

9. The tissue extraction device of claim 4 , wherein the distal portion of the tissue extraction lumen has an axial length of about 2 millimeters to 20 millimeters.

10. The tissue extraction device of claim 1 , wherein the side-facing window has an axial length between 10 millimeters and 30 millimeters.

11. A tissue extraction device, comprising:
an outer sleeve including an outer sleeve lumen extending therein, wherein the outer sleeve includes a closed distal tip and a side-facing window opening into the outer sleeve lumen, the side-facing window being proximally spaced apart from the closed distal tip; and
an inner sleeve disposed within the outer sleeve lumen and configured to axially reciprocate relative to the outer sleeve between a window-open position and a window-closed position, the window-open position and the window-closed position defining a total stroke length of the inner sleeve;
wherein in the window-closed position, the inner sleeve extends distal of the side-facing window by at least a first distance, the first distance being at least 10% of the total stroke length.

12. The tissue extraction device of claim 11 , wherein the inner sleeve defines a tissue extraction lumen having a proximal portion extending from a proximal end to a distal region and a distal portion extending from the distal region to a distal end of the inner sleeve, wherein the proximal portion of the tissue extraction lumen has a first cross-sectional area and the distal portion of the tissue extraction lumen has a second cross-sectional area less than the first cross-sectional area.

13. The tissue extraction device of claim 12 , wherein a projecting element extends proximally from the closed distal tip along a central longitudinal axis of the outer sleeve lumen.

14. The tissue extraction device of claim 13 , wherein the distal portion of the tissue extraction lumen defines a first axial length and the projecting element has a second axial length at least as long as the first axial length.

15. The tissue extraction device of claim 13 , wherein the projecting element extends proximal of a distal edge of the side-facing window.

16. The tissue extraction device of claim 11 , wherein the first distance is at least about 3 millimeters.

17. The tissue extraction device of claim 11 , wherein the first distance is at least about 4 millimeters.

18. The tissue extraction device of claim 11 , wherein the first distance is at least about 5 millimeters.

19. A tissue extraction device, comprising:
an outer sleeve including an outer sleeve lumen extending therein, wherein the outer sleeve includes a closed distal tip and a side-facing window opening into the outer sleeve lumen, the side-facing window being proximally spaced apart from the closed distal tip;
an inner sleeve disposed within the outer sleeve lumen and configured to axially reciprocate relative to the outer sleeve between a window-open position and a window-closed position, the window-open position and the window-closed position defining a total stroke length of the inner sleeve; and
a projecting element fixedly attached to and extending proximally from the closed distal tip coaxially with the outer sleeve lumen, the projecting element having a proximal end disposed proximal of a distal edge of the side-facing window;
wherein in the window-closed position, the inner sleeve extends distal of the distal edge of the side-facing window by at least a first distance, the first distance being at least 5% of the total stroke length.

20. The tissue extraction device of claim 19 , wherein the inner sleeve defines a tissue extraction lumen having a proximal portion extending from a proximal end to a distal region and a distal portion extending from the distal region to a distal end of the inner sleeve, wherein the proximal portion of the tissue extraction lumen has a first cross-sectional area and the distal portion of the tissue extraction lumen has a second cross-sectional area less than the first cross-sectional area;
wherein the projecting element extends to the proximal portion of the tissue extraction lumen when the inner sleeve in disposed in the window-closed position.

Assignees

• Minerva Surgical Inc

Inventors

• Germain Aaron
• Klein Kyle
• Orczy-Timko Benedek
• Shadduck John H
• Walker Michael D
• Truckai Csaba
• Lesko Balazs

Classifications

• A61B18/1485 Primary

  having a short rigid shaft for accessing the inner body through natural openings · CPC title

• A61B17/32002 Primary

  with continuously rotating, oscillating or reciprocating cutting instruments · CPC title

• A61B18/1482

  having a long rigid shaft for accessing the inner body transcutaneously in minimal invasive surgery, e.g. laparoscopy · CPC title

• A61B18/18

  by applying electromagnetic radiation, e.g. microwaves · CPC title

• A61B2017/320028

  with reciprocating movements · CPC title