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.
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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