Trocar sleeve

Patent metadata

Field	Value
Publication number	US-10603073-B2
Application number	US-201213485555-A
Country	US
Kind code	B2
Filing date	May 31, 2012
Priority date	May 31, 2011
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

A trocar sleeve for minimally invasive surgery, having a first sleeve part, which has essentially the shape of a straight tubular piece with a longitudinal axis, and having a second sleeve part, which at least partly surrounds the first sleeve part in close contiguity and is movable during use with respect to the first sleeve part. The mobility of the second sleeve part in relation to the first sleeve part consists essentially only in rotatability of the second sleeve part around the first sleeve part, and in addition the first sleeve part and the second sleeve part each comprise on their distal axial ends a flange part that extends radially outward at an angle of less than 180 degrees from the respective sleeve part.

First claim

What is claimed is:

1. A trocar assembly for minimally invasive surgery, comprising
a first sleeve part, which has essentially the shape of a straight tubular piece with a longitudinal axis, having a head part on a proximal end, and
a second sleeve part, which at least partly surrounds the first sleeve part and is rotatable around the first sleeve part,
wherein the first sleeve part and the second sleeve part each comprise on their distal axial ends a flange part that extends radially outward at an angle of less than 180 degrees from the respective sleeve part, and
wherein the second sleeve part is adapted to rotate its flange part along a plane approximately perpendicular to the longitudinal axis between two end positions, which are approximately 180 degrees apart with respect to the longitudinal axis, such that a first end position corresponds to an insertion position in which the flange parts of the first and second sleeve parts point approximately in the same direction, and such that a second end position corresponds to a working position in which the flange parts of the first and second sleeve parts point approximately in opposite directions to secure the trocar assembly in a body opening, the flange parts situated approximately in the plane perpendicular to the longitudinal axis in both the insertion position and working position.

2. The trocar assembly according to claim 1 , wherein in the insertion position the two flange parts are situated one above the other.

3. The trocar assembly according to claim 1 , wherein the head part comprises an insulation for gas-tight insertion of an instrument into the trocar assembly and a fluid connecting support, guide and locking elements in which a proximal end of the second sleeve part is guided for rotation around the first sleeve part and can be locked at least in an end position of the second sleeve part, which corresponds to the working position.

4. The trocar assembly according to claim 1 , wherein the section of the second sleeve part that surrounds the first sleeve part has essentially the shape of a straight tubular piece.

5. The trocar assembly according to claim 1 , wherein the section of the second sleeve part that surrounds the first sleeve part has essentially the shape of a half of a tube that is divided in half lengthwise.

6. The trocar assembly according to claim 5 , wherein the cross-section of the second sleeve part perpendicular to the longitudinal axis is a circular arc, which is larger than a semicircle.

7. The trocar assembly according to claim 1 , wherein each of the two sleeve parts has essentially the shape of a full tube.

8. The trocar assembly according to claim 7 , wherein the first sleeve part is detachably fastened on the head part and the two sleeve parts are configured in such a way that the second sleeve part can be assembled on the first sleeve part and disassembled from it when the first sleeve part is detached from the head part.

9. The trocar assembly according to claim 8 , wherein the flange parts of the first and second sleeve parts together have a U-shaped radial contour in the insertion position, as seen in a plane perpendicular to the longitudinal axis.

10. The trocar assembly according to claim 8 , wherein the detachable fastening of the first sleeve part on the head part includes a screw-in lock.

11. The trocar assembly according to claim 8 , wherein the detachable fastening of the first sleeve part on the head part includes a type of bayonet lock.

12. The trocar assembly according to claim 1 further comprising a trocar mandrel that fits in the first sleeve part, wherein the trocar mandrel has a blunt distal end whose contour ends essentially flush with the contour of the distal end of the first sleeve part when the trocar mandrel is inserted completely into the first sleeve part.

13. The trocar assembly according to claim 1 further comprising a securing element that is placed so as to surround the first and second sleeve parts and to secure the flange parts in the direction of the longitudinal axis.

14. The trocar assembly according to claim 13 , wherein the securing element is a one-piece rubber disc with a gap.

15. The trocar assembly according to claim 13 , wherein the securing element comprises a rigid element with a gap sized to match the outer diameter of the outer sleeve part and an elastic element that is detachable from the rigid element.

16. The trocar assembly according to claim 13 , wherein the securing element comprises a plate with a gap sized to fit the outer diameter of the outer sleeve part, a clamping element that can be slid on the plate for the outer sleeve part and an actuation element mounted on the plate for the slidable clamping element.

17. The trocar assembly according to claim 1 wherein a medical instrument is inserted through the tubular piece of the first sleeve part to perform a surgical procedure.

18. A trocar assembly for minimally invasive surgery, comprising
a first sleeve part, which has essentially the shape of a straight tubular piece with a longitudinal axis, having a head part on a proximal end, and
a second sleeve part, which at least partly surrounds the first sleeve part and is rotatable around the first sleeve part,
wherein the first sleeve part and the second sleeve part each comprise on their distal axial ends a flange part that extends radially outward at an angle of less than 180 degrees from the respective sleeve part to secure the trocar assembly in a body opening when in a working position, and
wherein the flange parts are connected as a single piece with the respective sleeve part and/or are each approximately 1 mm thick.

19. The trocar assembly according to claim 18 , wherein the second sleeve part is adapted to rotate its flange part along a plane approximately perpendicular to the longitudinal axis between two end positions, which are approximately 180 degrees apart with respect to the longitudinal axis, such that a first end position corresponds to an insertion position in which the flange parts of the first and second sleeve parts point approximately in the same direction, and such that a second end position corresponds to the working position in which the flange parts of the first and second sleeve parts point approximately in opposite directions.

20. A trocar assembly for minimally invasive surgery, comprising
a first sleeve part, which has essentially the shape of a straight tubular piece with a longitudinal axis, having a head part on a proximal end, and
a second sleeve part, which at least partly surrounds the first sleeve part and is rotatable around the first sleeve part,
wherein the first sleeve part and the second sleeve part each comprise on their distal axial ends a flange part that extends radially outward at an angle of less than 180 degrees from the respective sleeve part to secure the trocar assembly in a body opening when in a working position, and
wherein the flange parts have approximately U-shaped radial contours, as seen in a plane perpendicular to the longitudinal axis, such that the distance between the U-shape radial contours of the flange parts is approximately equal to the diameter of the first or of the second sleeve part.

21. The trocar assembly according to claim 20 , wherein the second sleeve part is adapted to rotate its flange part along a plane approximately perpendicular to the longitudinal axis between two end positions, which are approximately 180 degrees apart with respect to the longitudinal axis, such that a first

Assignees

• Tan Hock Lim
• Oberlaender Martin
• Fuchs Alexander
• Storz Karl Se & Co Kg

Inventors

• Tan Hock Lim
• Oberlaender Martin
• Fuchs Alexander

Classifications

• A61B2017/3484

  Anchoring means, e.g. spreading-out umbrella-like structure · CPC title

• A61B2090/0817

  Spatulas or spatula like extensions · CPC title

• A61B2017/3482

  inside · CPC title

• A61B17/3421 Primary

  Cannulas · CPC title

• A61B2017/346

  with wings · CPC title