Methods for manufacture of valve flaps for cardiac valve prosthe

Details Methods for manufacture of valve flaps for cardiac valve prosthe Methods for manufacture of valve flaps for cardiac valve prosthe

1984-07-25

1986-11-25

Silbaugh, Jan

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Starting material is nonhollow planar finite length preform...

8 9411, 264500, 264570, 623 2, B29C 5110, A61F 224

Patent

active

046248226

ABSTRACT:
Sheets of incompletely fixed biological tissue comprising portions for defining valve flaps of a cardiac valve prosthesis are mounted on forming means which can separate in a substantially fluid-tight manner the opposite faces of such portions. These opposite faces are subjected to a fluid pressure difference which produces deformation of the portions towards a conformation substantially identical with the conformation of the valve flaps when mounted in the prosthesis. The biological tissue is finally fixed while the portions defining the valve flaps of the prosthesis are maintained in the said conformation. The sheets of biological tissue are then separated from the forming means to be subsequently mounted in the frame of the prosthesis.

REFERENCES:
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patent: 4090878 (1978-05-01), Hancock
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patent: 4473423 (1984-09-01), Kolff
patent: 4477930 (1984-10-01), Totten et al.
Richter et al., "Funktion normaler und veranderter Mitralklappen wahrend experimenteller pulsierender Durchstromung", Biomedizinische Technik, Sep. 1980, pp. 247-249.
European Search Report of EP 84 83 0218 with Annex and Application.

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