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Primary Examiner: Frinks, Ronald L.
Assistant Examiner:
Attorney: Kenway & Jenney

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Title: Heart valve prosthesis

Abstract: A prosthesis for an inadequate or diseased heart valve, the prosthesis being formed of a porous fabric comprising multifilament synthetic yarns supported on a plural-lobed frame. The frame has generally parallel legs each comprising a pair of rod portions. The fabric is inserted between the rod portions of the legs to form flexible leaflets. Each leaflet consists essentially of a textile of filaments having a substantial number of open interstitial spaces in the range of 20 to 40 microns evenly distributed throughout the fabric. The resulting composite structures are free of thrombogenic complications.

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Other info:

Inventors: Davis, Robert B. (Framingham, MA, US)
Skelton, John (Sharon, MA, US)
Clark, Richard E. (St. Louis, MO, US)
Swanson, Wilbur M. (St. Louis, MO, US)

Application Number: 790442
Filing Date: 1977-04-25
Publication_date: 1980-03-11
Assignee: Washington University (); Albany International Corporation ()
Primary Class(es): 623/2.19 623/2.13, 623/900
Other Classes:
US Patent Ref:

3571815	Mar, 1971	Somyk	3/1.
3608097	Sep, 1971	Bellhouse et al.	3/1.
3736598	Jun, 1973	Bellhouse et al.	3/1.

Other Refs: Other References: "The Direct Approach for the Correction of Aortic Insufficiency," by Charles A. Hufnagel et al., J.A.M.A., vol. 178, No. 3, Oct. 21, 1961, pp. 275-279.
"Comparative Study of Some Prosthetic Valves for Aortic and Mitral Replacement, Surgery," vol. 57, No. 1, Jan. 1965, pp. 205-210, by C. A. Hufnagel et al.