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US 5,931,165 AGranted
Films having improved characteristics and methods for their preparation and use
AssigneeFusion Medical Technologies, Inc.
InventorsCary J. Reich, Donald G. Wallace, Greg Dapper
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Abstract
Gelatin film compositions are useful for immobilization over tissue, usually by the application of energy to the films. Exemplary films comprise cross-linked and non-cross-linked granular and non-granular gelatin sheets, typically including a plasticizer. The gelatin films are dry, thin, and preferably meet certain pliability, elasticity, melting temperature, and other criteria. Methods are described for producing these films from collagen. Methods are further described for applying these films to tissue.
Claims16
A gelatin film characterized by:
- a film thickness in the range from 0.03 mm to 0.2 mm;
- a pliability in the range from 1 mN to 4 mN;
- and
- at least one characteristic selected from the group consisting of:
- a moisture content in the range from 11% to 16%;
- an elasticity in the range from 30% to 150%;
- a tensile strength in the range from 150 N/cm.sup.2 to 260 N/cm.sup.2 ;
- a melting temperature in the range from 33.degree. C. to 40.degree. C.;
- a collagenase digestion time in the range from 10 min. to 40 min, and
- a degree of swelling (V/V.sub.o) in the range from 4.5 to 6.5.
7 more elements
Dependencies are inferred from the claim text.