بعض محتويات هذا التطبيق غير متوفرة في الوقت الحالي.
إذا استمرت هذه الحالة ، يرجى الاتصال بنا علىتعليق وإتصال
1. (WO2019064151) RADIAL SUPPORT ASSEMBLY FOR A TROCAR ASSEMBLY
ملاحظة: نص مبني على عمليات التَعرف الضوئي على الحروف. الرجاء إستخدام صيغ PDF لقيمتها القانونية

CLAIMS

What is claimed is:

1. A trocar assembly, comprising :

a trocar housing that defines a working chamber;

a cannula having a proximal end and a distal end, wherein the cannula is coupled to the trocar housing at the proximal end to facilitate communication between the cannula and the working chamber; and

a radial support assembly arranged at or near the distal end and including a plurality of radial support members that extend radially inward toward a centerline of the cannula to center a surgical tool within the cannula and thereby minimize unintended oscillation and vibration of the surgical tool.

2. The trocar assembly of claim 1, wherein the cannula includes a first cannula portion and a second cannula portion separated by a gap, and the trocar assembly further comprises:

a plurality of support columns extending between and connecting the first and second cannula portions, wherein each radial support member is arranged within the gap and mounted to a corresponding one of the plurality of support columns.

3. The trocar assembly of claim 2, further comprising :

a longitudinal slot defined in each radial support member, wherein each longitudinal slot is sized to receive the corresponding one of the plurality of support columns; and

a biasing device that interposes each radial support member and the corresponding one of the plurality of support columns to compliantly urge each radial support member toward the centerline.

4. The trocar assembly of claim 2, wherein each radial support member further define an inner surface engageable with an outer radial surface of the surgical tool, and wherein each inner surface transitions into a beveled surface that helps the radial support assembly receive the surgical tool.

5. The trocar assembly of claim 1, further comprising a plurality of windows defined in the cannula at or near the distal end, wherein each window is shaped to receive and seat a corresponding one of the plurality of radial support member columns.

6. The trocar assembly of claim 5, further comprising :

a tab defined by each window;

a pocket defined on each radial support member and alignable with the tab; and

a biasing device received within the pocket of each radial support member and interposing the tab and the corresponding one of the plurality of radial support members to compliantly urge each radial support member toward the centerline.

7. The trocar assembly of claim 5, wherein each window defines two longitudinal slots separated by a central portion, the trocar assembly further comprising :

a pocket defined on each radial support member and alignable with the central portion; and

a biasing device received within the pocket of each radial support member and interposing the tab and the corresponding one of the plurality of radial support members to compliantly urge each radial support member toward the centerline.

8. The trocar assembly of claim 1, wherein the radial support assembly is arranged within the cannula at or near the distal end and the plurality of radial support members comprise keystones arranged side by side to form a ring within the cannula.

9. The trocar assembly of claim 8, wherein the plurality of radial support members comprise:

a first plurality of radial support members extending from an inner radial surface of the cannula toward the centerline to a first radial depth; and

a second plurality of radial support member extending from the inner radial surface toward the centerline to a second radial depth smaller than the first radial depth.

10. The trocar assembly of claim 9, wherein the first and second pluralities of radial support members are releasably attached to the inner radial surface.

11. The trocar assembly of claim 8, wherein the plurality of radial support members are made of a biodegradable material.

12. The trocar assembly of claim 8, further comprising a retention sled coupled to a corresponding one of the plurality of radial support members to retain the corresponding one of the plurality of radial support members when forced out of the cannula by the surgical tool.

13. The trocar assembly of claim 12, wherein the retention sled comprises: a slider;

an arm that extends from the slider and through a slider track defined in a wall of the cannula; and

a head arranged at an end of the arm and received within a retention channel defined on a backside of the corresponding one of the plurality of radial support members.

14. The trocar assembly of claim 13, wherein the corresponding one of the plurality of radial support members defines an angled upper surface and the retention channel transitions into an angled portion contiguous with the angled upper surface, and wherein the angled upper surface and the angled portion of the retention channel cooperatively allow the corresponding one of the plurality of radial support members to exit the cannula and move radially outward.

15. The trocar assembly of claim 13, further comprising a biasing device that urges the slider proximally relative to the cannula and thereby simultaneously urges the corresponding one of the plurality of radial support members back into the cannula when forced out of the cannula with the surgical tool.

16. A method of using a trocar assembly, comprising :

introducing a surgical tool into a working chamber defined by a trocar housing that communicates with a cannula coupled to the trocar housing, wherein a radial support assembly is arranged at or near a distal end of the cannula and includes a plurality of radial support members that extend radially inward toward a centerline of the cannula;

extending the surgical tool into the cannula; and

engaging an outer surface of the surgical tool with the plurality of radial support members and thereby centering the surgical tool within the cannula and minimizing unintended oscillation and vibration of the surgical tool.

17. The method of claim 16, wherein the cannula includes a first cannula portion and a second cannula portion separated by a gap and a plurality of support columns extend between and connect the first and second cannula portions, and wherein each radial support member is arranged within the gap and mounted to a corresponding one of the plurality of support columns, the method further comprising :

receiving the corresponding one of the plurality of support columns in a longitudinal slot defined in each radial support member; and

compliantly urging each radial support member toward the centerline with a biasing device that interposes each radial support member and the corresponding one of the plurality of support columns.

18. The method of claim 16, wherein a plurality of windows are defined in the cannula at or near the distal end and each window is shaped to receive and seat a corresponding one of the plurality of radial support member columns, the method further comprising :

aligning a pocket defined on each radial support member with a tab defined by each window; and

compliantly urging each radial support member toward the centerline with a biasing device received within the pocket of each radial support member and interposing the tab and the corresponding one of the plurality of radial support members.

19. The method of claim 16, wherein the surgical tool is a first surgical tool having a first diameter and the plurality of radial support members comprise keystones that form a ring within the cannula, and

wherein the plurality of radial support members comprise a first plurality of radial support members extending from an inner radial surface of the cannula toward the centerline to a first radial depth, and a second plurality of radial support member extending from the inner radial surface toward the centerline to a second radial depth smaller than the first radial depth,

the method further comprising :

radially supporting the first surgical tool within the cannula with the first plurality of radial support members;

introducing a second surgical tool having a second diameter greater than the first diameter into the cannula;

axially engaging and forcing the first plurality of radial support members out of the cannula with the second surgical tool; and

radially supporting the second surgical tool within the cannula with the second plurality of radial support members.

20. The method of claim 19, further comprising a retention sled coupled to a corresponding one of the first plurality of radial support members, the method further comprising :

retaining the corresponding one of the first plurality of radial support members forced out of the cannula with the second surgical tool;

removing the second surgical tool from the cannula; and

returning the corresponding one of the first plurality of radial support members back into the cannula.