IP Library Granted Patent US 11,832,811
Granted Patent B2
US 11,832,811 · App. 17/386,741 · Granted Dec 5, 2023

Surgical coated needles

Inventors: Duan Li Ou (Warren, NJ); Frank Cichocki (Easton, PA); Thien Nguyen (Flowery Branch, GA)
Assignee: Cilag GmbH International
A61B17/06066B05D1/02B05D1/18B05D3/06A61B2017/00526A61B2017/00849A61B2017/00853A61B2017/06028B05D3/0493B05D5/08B05D7/14B05D7/50B05D2258/00B23K26/389
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Quick Facts
Patent No.
US 11,832,811
App. No.
17/386,741
Granted
Dec 5, 2023
Kind
B2
Abstract

Systems and methods for coating surgical needles are provided.

Claims (11)

1. A method for coating a surgical needle, the method comprising:

spray coating a primer coat onto a portion of a surface of a surgical needle blank formed from a tungsten-rhenium alloy, the portion of the surgical needle blank having a tissue-penetrating end;

spray coating a base coat that differs from the primer coat onto a primed surface of the surgical needle blank, the primed surface being the portion of the surface that is sprayed coated with the primer coat;

laser-drilling the surgical needle blank, after spray coating the primer and the base coats, to create a suture attachment end opposite the tissue-penetrating end, thereby forming the surgical needle; and

dip coating a top coat that differs from the base coat onto the base coat and onto the suture attachment end.

2. The method of claim 1 , wherein the top coat is formed from a composition comprising a silicone at a concentration from about 1% to 3% by weight of the composition.

3. The method of claim 1 , further comprising vacuum drying the top coat.

4. The method of claim 3 , further comprising, after vacuum drying, removing at least a portion of solvent from the top coat at a temperature from about 90° C. to 130° C.

5. The method of claim 1 , wherein dip coating the top coat comprises placing the surgical needle in a basket and placing the basket into a top coating solution, the basket having a drainage area that is from 50% to about 95% of a total surface area of the basket.

6. The method of claim 5 , wherein the basket has a base portion, a top portion, and a first and a second pair of opposing sidewalls each extending from the base portion to the top portion, and wherein the base and top portions each include a porous substrate and the sidewalls each include one or more drainage holes.

7. The method of claim 1 , further comprising at least partially curing at least one of the primer coat and the base coat.

Continuity (3)
Division 16053221 · Aug 2, 2018
Provisional Application 62559267 · Sep 15, 2017
Related Publication 20210353286A1 · Nov 18, 2021