Surgical clip

Patent metadata

Field	Value
Publication number	US-9572579-B2
Application number	US-201313777169-A
Country	US
Kind code	B2
Filing date	Feb 26, 2013
Priority date	Oct 4, 2010
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

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 molding. The first wall portion is produced with a greater shrinkage than the second wall portion.

First claim

The invention claimed is:

1. Surgical clip 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, the two clip arms each having a first free distal end, the first free distal 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, each of the clip arms at a corresponding second proximal end thereof opposite the first free distal end being held connected to a wall section of the resiliently flexible element, the wall section being arranged substantially transverse to a longitudinal direction of the clip arms, extending between the second proximal ends of the clip arms, and having 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 molding, the plastics material comprises a polyetherketone, the first wall portion of the wall section is produced with a greater shrinkage than the second wall portion, the two clip arms comprise elongated clip arms, and the elongated clip arms come into contact with each other with the free distal ends first during transfer from an application position to the rest position, and come into full surface-to-surface contact with each other when in the rest position, the resiliently flexible element has on a side thereof facing away from the clip arms stop elements which form a stop when the clip is transferred from the rest position to the application position in which the free distal ends of the clip arms are spaced apart from each other.

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 molding.

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

4. Surgical clip in accordance with claim 1 , wherein an opening angle of the clip arms in the application position is limited to a value of approximately 45°.

5. Surgical clip in accordance with claim 1 , wherein the stop elements are configured to be of complementary form.

6. Surgical clip in accordance with claim 5 , wherein the complementary-configured stop elements are configured such that at least one of a lateral and an axial guiding of the stop elements results when the clip arms are transferred to the application position.

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

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

9. Surgical clip in accordance with claim 1 , wherein the clip is configured as an aneurysm clip.

10. Surgical clip in accordance with claim 1 , wherein:
the plastics material of the resiliently flexible element comprises a PEEK material, and
the clip arms are made of a plastics material comprising one of a polymide or a polyetherketone.

11. Method for producing a surgical clip, wherein the surgical clip comprises: two clip arms, and a resiliently flexible element via which the two clip arms are pivotally connected to each other, the two clip arms each having a first free distal end, the first free distal 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, each of the clip arms at a corresponding second proximal end thereof opposite the first free distal end being held connected to a wall section of the resiliently flexible element the wall section being arranged substantially transverse to a longitudinal direction of the clip arms, extending between the second proximal ends of the clip arms, and having a first wall portion facing towards the clip arms and a second wall portion facing away from the clip arms, wherein: the plastics material comprises a polyetherketone, the two clip arms comprise elongated clip arms, and the elongated clip arms come into contact with each other with the free distal ends first during transfer from an application position to the rest position, and come into full surface-to-surface contact with each other when in the rest position, the method comprising: in the process of manufacturing the resiliently flexible element of the clip, a molten liquid plastics material is fed into a mold in an injection molding process and cooled, and as the plastics material cools, the mold is held in a region thereof forming the wall section of the resiliently flexible element at a higher temperature on a side of the first wall portion than on a side of the second wall portion to produce the first wall portion with a greater shrinkage than the second wall portion, wherein the resiliently flexible element has on a side thereof facing away from the clip arms stop elements which form a stop when the clip is transferred from the rest position to the application position in which the free distal ends of the clip arms are spaced apart from each other.

Assignees

• Aesculap Ag

Inventors

• Weisshaupt Dieter

Classifications

• A61B17/083 Primary

  Clips, e.g. resilient · CPC title

• A61B17/1285

  for minimally invasive surgery · CPC title

• B29C2045/7343

  heating or cooling different mould parts at different temperatures · CPC title

• B29L2031/7546

  Surgical equipment · CPC title

• A61B17/1227 Primary

  Spring clips · CPC title