SURGICAL CLIP

• US 20130172914A1
• Filed: 02/26/2013
• Published: 07/04/2013
• Est. Priority Date: 10/04/2010
• Status: Active Grant

• Current Assignee: Aesculap AG (Lonza Group AG)
• Original Assignee: Aesculap AG (Lonza Group AG)
• Inventors: Weisshaupt, Dieter
• Granted Patent: US 9,572,579 B2
• Time in Patent Office: Days
• US Class Current: 606/151
• CPC Class Codes: A61B 17/083 Clips, e.g. resilient
• CPC Class Codes: A61B 17/1227 Spring clips
• CPC Class Codes: A61B 17/1285 for minimally invasive surgery
• CPC Class Codes: A61B 2017/00004 (bio)absorbable, (bio)resorbable or resorptive
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/00862 elastic or resilient
• CPC Class Codes: B29C 2045/7343 heating or cooling different mould parts at different temperatures
• CPC Class Codes: B29C 45/73 of the mould B29C45/2642 and B29C45/2737 take precedence
• CPC Class Codes: B29L 2031/7546 Surgical equipment

Abstract

A surgical clip is provided, having two clip arms and a resiliently flexible element pivotally connecting the two clip arms together. The two clip arms each have a first free end, which are held in parallel to and in contact with each other with a predetermined closing force by the flexible element in a rest position. At a second end opposite the free end, the clip arms are held connected to a wall section of the flexible element that is arranged substantially transverse to the longitudinal direction of the clip arms, extends between the second ends of the clip arms and has a first wall portion facing towards the clip arms and a second wall portion facing away from the clip arms. The flexible element is made from a plastics material by injection moulding. The first wall portion is produced with a greater shrinkage than the second wall portion.

Claims

1. Surgical clip, in particular for use as an implant, comprising two clip arms and a resiliently flexible element via which the two clip arms are pivotally connected to each other, wherein the two clip arms each have a first free end, these first free ends being held in parallel to and in contact with each other with a predetermined closing force by the resiliently flexible element when the clip is in a rest position, wherein the clip arms at a second end thereof opposite the free end are held connected to a wall section of the resiliently flexible element which is arranged substantially transverse to the longitudinal direction of the clip arms, extends between the second ends of the clip arms and has a first wall portion facing towards the clip arms and a second wall portion facing away from the clip arms, wherein the resiliently flexible element is made of a plastics material by injection moulding, wherein the first wall portion of the wall section is produced with a greater shrinkage than the second wall portion.

2. Surgical clip in accordance with claim 1, wherein the clip arms are made of a metallic material and the resiliently flexible element is integrally formed on the clip arms by injection moulding.

3. Surgical clip in accordance with claim 1, wherein the clip arms are made of a plastics material and are preferably formed by injection-moulding them in one piece with the resiliently flexible element.

4. Surgical clip in accordance with claim 1, wherein the resiliently flexible element has on the side thereof facing away from the clip arms stop elements which form a stop when the clip is transferred from the rest position to an application position in which the free ends of the clip arms are spaced apart from each other.

5. Surgical clip in accordance with claim 4, wherein the opening angle of the clip arms in the application position is limited to a value of approximately 45°

.

6. Surgical clip in accordance with claim 4, wherein the stop elements are configured to be of complementary form.

7. Surgical clip in accordance with claim 6, wherein the complementary-configured stop elements are configured such that at least one a lateral and an axial guiding of the stop elements results when the clip arms are transferred to the application position.

8. Surgical clip in accordance with claim 1, wherein the clip arms come into contact with each other with their free ends first when transferred from the application position to the rest position.

9. Surgical clip in accordance with claim 1, wherein the wall section of the resiliently flexible element has a substantially hollow-cylindrical contour.

10. Surgical clip in accordance with claim 1, wherein the stop elements have on the exterior surfaces thereof positioning elements for a tool.

11. Surgical clip in accordance with claim 1, wherein the clip is configured as an aneurysm clip, in particular as a cerebral aneurysm clip.

12. Surgical clip in accordance with claim 1, wherein the plastics material of the resiliently flexible element and optionally of the clip arms is a polyimide or a polyetherketone, in particular a PEEK material.

13. Surgical clip in accordance with claim 1, wherein the plastics material of the resiliently flexible element and optionally of the clip arms is a resorbable plastics material.

14. Method for producing a surgical clip in accordance with claim 1, wherein in the process of manufacturing the resiliently flexible element of the clip, a molten liquid plastics material is fed into a mould and cooled, wherein as the plastics material cools, the mould is held in the region thereof forming the wall section of the resiliently flexible element at a higher temperature on the side of the first wall portion than on the side of the second wall portion.