EP0432692A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Grip surgical clip
Assignee: Edward Weck Inc
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Filing: 1990-12-10
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Granted: —
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Expires: 2010-12-10
Abstract
Abstract The present invention is directed to a method of increasing the surface roughness or at least portions of surgical clips by applying coatings of material to the tissue gripping surfaces of hemostatic clips and/or to the outwardly directed faces of the blades of aneurysm clips. The material may include metal particles or ceramics. Preferable ceramics are alumina and even more preferable hydroxyapatite. The invention is also directed to the clips with such coatings applied thereto.
Inventors
- 👤 Paul M. Vernon
- 👤 John C. Phillips
- 👤 William Lee
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 08:58
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/12; A61B17/122
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
47 words
A method of increasing the tissue gripping characteristics of a surgical clip comprising the step of: increasing the surface roughness of at least the tissue gripping surfaces of the clip by fixedly attaching a layer of material on at least the tissue gripping surfaces of the clip.
Claim 2
Dependent Claim
17 words
The method of claim 1 wherein the clips are metallic clips and the material comprises metallic particles.
Claim 3
Dependent Claim
69 words
The method of claim 2 wherein the method comprises: applying a mixture of metallic particles and a suitable binder to the tissue clamping surfaces of the clip; drying the coating on the clip at a low temperature; heating the coated clip to a temperature where the binders burn off for a pre-determined period of time; and then raising the temperature to the sintering temperature for the metals being used.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein the material comprises a ceramic material.
Claim 5
Dependent Claim
22 words
The method of claim 2, 3, or 4, wherein the step of fixedly attaching comprises spraying said clips with a plasma spray.
Claim 6
Dependent Claim
24 words
The method of claim 2, 3, or 4, wherein said step of fixedly attaching comprises attaching said layer with a physical vapor deposition process.
Claim 7
Dependent Claim
24 words
The method Of claim 2, 3, or 4, wherein said step of fixedly attaching comprises attaching said layer by glueing with a surgical glue.
Claim 8
Dependent Claim
41 words
The method of claim 5 cross-referenced to claim 2 or 3, wherein said clips comprise titanium and said particles comprise titanium particles and said step of spraying with a plasma spray includes spraying in a low pressure or inert gas chamber.
Claim 9
Independent Claim
25 words
The method of any one of claims 1 to 8, wherein the method further comprises heating the coated clips after the layer has been applied.
Claim 10
Independent Claim
27 words
The method of any one of claims 5, 6 or 8, wherein said method further comprises masking portions of the clip to avoid coating said masked areas.
Claim 11
Dependent Claim
39 words
The method of claim 9 or 10, wherein the coating along the tissue gripping surfaces of the clip is interrupted in predetermined locations to avoid chipping of the coating from the clip when the clip is formed or applied.
Claim 12
Dependent Claim
69 words
A hemostatic clip comprising a pair of arms interconnected at one end and opened at the other with the arms arranged in laterally spaced apart substantially parallel relation, each of said arms having a side facing inwardly, said hemostatic clip further comprising a layer of material on at least said inwardly facing sides of said arms which increases the surface roughness of the tissue gripping surfaces of the clip.
Claim 13
Dependent Claim
11 words
The clip of claim 12 wherein said material comprises metal particles.
Claim 14
Dependent Claim
18 words
The clip of claim 13 wherein said clip comprises stainless steel and said metal particles comprise stainless steel.
Claim 15
Dependent Claim
18 words
The clip of claim 13 wherein the clip comprises titanium or tantalum and said metal particles comprises titanium.
Claim 16
Dependent Claim
11 words
The clip of claim 12 wherein said material comprises a ceramic.
Claim 17
Dependent Claim
10 words
The clip of claim 16 wherein said ceramic comprises hydroxyapatite.
Claim 18
Dependent Claim
10 words
The clip of claim 16 wherein said ceramic comprises alumina.
Claim 19
Dependent Claim
16 words
The clip of claim 16, 17 or 18, wherein said ceramic comprises a biocompatible glass material.
Claim 20
Dependent Claim
32 words
The clip of any one of claims 15 to 19, wherein each of the inwardly facing sides of said arms comprises at least one longitudinal groove and at least one cross-wise serration.
Claim 21
Dependent Claim
34 words
The clip of claim 20, wherein each of said arm portions is generally triangular in cross-section with the apex of said triangular cross-section facing outwardly in the opposite direction from said inwardly facing side.
Claim 22
Dependent Claim
17 words
The clip of claim 20 or 21, wherein said material is applied only within said longitudinal groove.
Claim 23
Dependent Claim
84 words
An aneurysm clip comprising: a pair of clamping arms having proximal and distal ends and having opposed clamping faces and opposite outwardly directed faces, said arms being pivoted intermediate said ends and adapted for clamping engagement with the outer surfaces of the walls of an arterial vessel; spring means resiliently biasing said arms into clamping position; and a layer of ceramic material on the opposite outwardly directed faces of said clamping arms, said ceramic material disposed to accept tissue growth from the surrounding tissue.
Claim 24
Dependent Claim
20 words
The aneurysm clip of claim 23 wherein said clamp comprises a layer of ceramic material on said opposed clamping faces.
Claim 25
Dependent Claim
14 words
The aneurysm clip of claim 23 or 24 wherein said ceramic material comprises hydroxy-apatite.
Claim 26
Independent Claim
39 words
A method of stabilizing an aneurysm clip having a pair of clamping arms with opposed clamping faces and opposite outwardly directed faces comprising the step of fixedly applying a layer of ceramic material to the oppositely, outwardly directed faces.
Claim 27
Dependent Claim
21 words
The method of claim 26 wherein said method further comprises applying a layer of ceramic material to said opposed clamping surfaces.
Claim 28
Dependent Claim
13 words
The method of claim 26 or 27 wherein said ceramic material comprises hydroxyapatite.
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Cited
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Cited
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Cited
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