Control of tissue growth in textured blood-contacting surfaces

Details Control of tissue growth in textured blood-contacting surfaces Control of tissue growth in textured blood-contacting surfaces

1999-02-25

2000-04-18

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604151, 604500, A61M 3700

Patent

active

060509759

ABSTRACT:
A blood pump provides a mechanism to prevent excessive growth of tissue at the transition zone between a smooth blood contacting surface and a textured blood contacting surface. The blood pump includes a blood flow channel having a textured surface, a smooth surface adjacent to the textured surface, and a rotor positioned within the blood flow channel. The rotor includes at least one impeller blade that defines a sweep when the rotor turns. The impeller blade is designed to cut off a portion of a biologic lining as it grows from the textured surface into the sweep of the impeller blade.

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patent: 5211546 (1993-05-01), Isaacson et al.
patent: 5632779 (1997-05-01), Davidson
Parnis et al.; "Progress in the Development of a Transcutaneously Powered Axial Flow Blood Pump Ventricular Assist System"; Asaio J 43(5); Sep. 1997; pp. M576-M580.
MacGregor et al.; "The Porous-surfaced electrode"; The Journal of Thoracic and Cardiovascular Surgery 78(2); Aug. 1979; pp. 281-291.
MacGregor et al.; "Improved Thromboresistance of Mechanical Heart Valves with Endothelialization of Porous Metal Surfaces"; Surgical Forum 30; 1979; pp. 239-241.
Bobyn et al.; "Effect of pore size in the peel strength of attachment of fibrous tissue to porous-surfaced implants"; Journal of Biomedical Materials Research 16(5); Sep. 1982; pp. 571-584.

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