Release device for releasing a medical implant from a catheter and catheter comprising a release device

Patent metadata

Field	Value
Publication number	US-9649212-B2
Application number	US-201213687393-A
Country	US
Kind code	B2
Filing date	Nov 28, 2012
Priority date	Aug 30, 2012
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A release device for releasing a medical implant from an insertion device, having an indirect or direct clamping body for clamping the implant in the insertion device, the clamping device having a proximal end, and having a distal end, wherein the clamping body has at least one web, at least one extension and at least two clamping surface regions, wherein the extension is oriented substantially in the radial direction of the clamping body, and wherein the at least two clamping surface regions are substantially pointing toward one another and are aligned substantially parallel to one another, wherein the at least one web or the at least one extension has at least one of the two clamping surface regions, and wherein the at least two clamping surface regions and/or the at least one extension connect/connects to at least one region of the implant in the clamped state.

First claim

What is claimed is:

1. A release device with an engaged medical implant, wherein the medical implant is held within an insertion device and the release device is configured to release the implant from the insertion device by a relative movement between a first and a second insertion element of the insertion device, the release device comprising a clamping body clamped to the implant, the clamping body comprising:
a proximal end, which is remote from a distal end of the insertion device during use, and comprising a distal end, which faces the distal end of the insertion device during use;
a cylinder spaced outside of and extending around an inner surface to form a receptacle for receiving the implant between the cylinder and the inner surface, wherein the cylinder comprises an engagement element through which the received implant is engaged; and
at least one web comprising at its distal end an extension oriented substantially in a radial direction relative to an inner axis of the clamping body, the extension engaging the received implant through the engagement element and within the receptacle to provide a clamped state.

2. The release device as claimed in claim 1 , wherein the at least one web and/or the extension is formed resiliently.

3. The release device as claimed in claim 2 , wherein the clamping body has a multiplicity of webs, which are distributed symmetrically over a peripheral edge of the clamping body.

4. The release device as claimed in claim 1 , wherein the at least one web can be arranged relative to the inner axis of the clamping body at an angle (α) of substantially 30°, and/or wherein the extension is arranged on the at least one web at an angle (β) of substantially 70°.

5. The release device as claimed in claim 1 , wherein the clamping body has a holding position in the clamped state and, when the holding position is released, has a neutral position, wherein the clamping body is movable into the neutral position by a resilience of the at least one web and/or the extension so as to release the implant.

6. The release device as claimed in claim 1 , wherein the receptacle comprises a slit to receive the implant, wherein the slit extends at least along part of an edge of the clamping body.

7. The release device as claimed in claim 1 , wherein the receptacle has at least one separating structure, which divides the receptacle into at least two receptacle sectors and/or which fixes the implant in the receptacle in a direction along an edge of the clamping body, at least in an intended insertion state.

8. The release device as claimed in claim 1 , wherein the clamping body has at least one insertion aid, which is designed to guide insertion of the implant and which is arranged before the receptacle of the clamping body in a direction of supply when introducing the implant into the clamping body.

9. The release device as claimed in claim 1 , wherein the clamping body is configured to be fastened to one of the insertion elements, in particular via its proximal end or its distal end.

10. The insertion device as claimed in claim 1 , wherein the engagement element is an aperture sized to accept the extension and permits access to the received implant through the aperture.

11. An insertion device for insertion of a medical implant, which can be released by a relative movement between a first and a second insertion element, the insertion device comprising a release device engaged with the medical implant and for releasing the medical implant, the release device comprising an indirect and/or direct clamping body clamped to the implant in the insertion device, the clamping body comprising:
a proximal end, which is remote from a distal end of the insertion device during use, and comprising a distal end, which faces the distal end of the insertion device during use;
a cylinder spaced outside of and extending around an inner surface to form a receptacle for receiving the implant between the cylinder and the inner surface, wherein the outer cylinder comprises an engagement element through which the received implant is capable of engagement; and
at least one web comprising at its distal end an extension oriented substantially in the radial direction relative to an inner axis of the clamping body, the extension engaging the received implant through the engagement element and within the receptacle to provide a clamped state.

12. The insertion device as claimed in claim 11 , wherein a stopper is provided, which limits a movement of the implant in the direction of a proximal end of the insertion device or in the direction of the distal end of the insertion device, wherein the clamping body is formed integrally with the stopper.

13. The insertion device as claimed in claim 11 , wherein the implant is a self-expanding implant and/or has no fastening elements.

Assignees

• Biotronik Ag

Inventors

• Fargahi Amir

Classifications

• A61F2002/9665

  with additional retaining means · CPC title

• A61F2/966 Primary

  with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod · CPC title

• A61F2/95 Primary

  Instruments specially adapted for placement or removal of stents or stent-grafts · CPC title

• A61F2/2439

  Expansion controlled by filaments · CPC title

• A61F2/2436

  Deployment by retracting a sheath · CPC title