Dry powder fibrin sealant
First Claim
Patent Images
1. A dry powder fibrin sealant composition, comprising:
- a mixture of first microparticles that comprise fibrinogen and trehalose, andsecond microparticles that comprise thrombin and trehalose,wherein trehalose is the only stabilizing sugar in the first microparticles and second microparticles, andwherein the concentration of trehalose in the first microparticles is sufficient to preserve at least 70% of fibrinogen activity after exposure of the first microparticles to a 25 kGy dose of gamma irradiation delivered at a rate of 8 kGy/hour.
7 Assignments
0 Petitions
Accused Products
Abstract
The invention provides a composition comprising a mixture of first microparticles that comprise fibrinogen and trehalose, and second microparticles that comprise thrombin and trehalose. The invention further provides methods for treating wounds by administering the novel microparticle composition.
-
Citations
25 Claims
-
1. A dry powder fibrin sealant composition, comprising:
-
a mixture of first microparticles that comprise fibrinogen and trehalose, and second microparticles that comprise thrombin and trehalose, wherein trehalose is the only stabilizing sugar in the first microparticles and second microparticles, and wherein the concentration of trehalose in the first microparticles is sufficient to preserve at least 70% of fibrinogen activity after exposure of the first microparticles to a 25 kGy dose of gamma irradiation delivered at a rate of 8 kGy/hour. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A method for preparing a dry powder fibrin sealant composition comprising a mixture of first microparticles that comprise fibrinogen and trehalose and second microparticles that comprise thrombin and trehalose, wherein trehalose is the only stabilizing sugar in the first microparticles and second microparticles, the method comprising:
-
(i) spray-drying a first aqueous solution comprising fibrinogen and trehalose to produce said first microparticles, wherein said first aqueous solution does not include a second stabilizing sugar and the concentration of trehalose in the first microparticles is sufficient to preserve at least 70% of fibrinogen activity after exposure of the first microparticles to a 25 kGy dose of gamma irradiation delivered at a rate of 8 kGy/hour; (ii) spray-drying a second aqueous solution comprising thrombin and trehalose to produce said second microparticles, wherein said second aqueous solution does not include a second stabilizing sugar; and (iii) mixing the first and second microparticles. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
-
Specification