Surgical stapling device with coated knife blade
First Claim
1. A surgical stapling device comprising a knife, said knife comprising a tissue cutting end and a surface, a portion of said surface having a coating thereon, the coating formed from a coating mixture comprising a first solution comprising at least one polydialkylsiloxane and a first organic solvent, and a second solution comprising at least one siliconization material and a second organic solvent, wherein the polydialkylsiloxane is present in the first solution at a concentration of from about 10 g/l to about 70 g/l and has a molecular weight sufficient to provide a viscosity of the coating mixture of at least about 10,000 cp, and the siliconization material is present in the second solution at a concentration of from about 10 g/l to about 80 g/l.
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Accused Products
Abstract
A surgical stapling device is disclosed for performing circular anastomoses. The surgical stapling device includes a handle portion, an elongated body portion and a head portion including an anvil assembly and a shell assembly. The surgical stapling device includes a knife blade possessing a lubricious coating which enhances the ability of the knife to cut through tissue and minimizes the knife sticking to tissue or other components of the surgical stapling device.
466 Citations
24 Claims
- 1. A surgical stapling device comprising a knife, said knife comprising a tissue cutting end and a surface, a portion of said surface having a coating thereon, the coating formed from a coating mixture comprising a first solution comprising at least one polydialkylsiloxane and a first organic solvent, and a second solution comprising at least one siliconization material and a second organic solvent, wherein the polydialkylsiloxane is present in the first solution at a concentration of from about 10 g/l to about 70 g/l and has a molecular weight sufficient to provide a viscosity of the coating mixture of at least about 10,000 cp, and the siliconization material is present in the second solution at a concentration of from about 10 g/l to about 80 g/l.
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16. A surgical stapling device for performing a circular anastomosis comprising:
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a handle assembly including a firing trigger; a body portion extending distally from the handle assembly; a head portion including an anvil assembly and a shell assembly, the anvil assembly including a cutting ring and being movable in relation to the shell assembly between spaced and approximated positions, the shell assembly comprising; a pusher movable in relation to the anvil assembly between retracted and extended positions, the pusher configured to eject staples; and a circular knife comprising a tissue cutting end and a surface, the knife configured to engage and cut into the cutting ring upon firing, a portion of said surface and the tissue cutting end having a coating thereon to prevent the knife from sticking to the cutting ring, the coating formed from a coating mixture comprising at least one polydialkylsiloxane, at least one siliconization material, and at least one organic solvent, wherein the polydialkylsiloxane and siliconization material is prepared at a ratio of from about 5;
0.25 to about 2;
0.75, and the polydialkylsiloxane has a molecular weight sufficient to provide a viscosity of the coating mixture of at least about 10,000 cp. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification