Hemostatic dressing
AssigneeAmerican National Red Cross
InventorsMartin Macphee, Dawson Beall, Stanley Friedman
Life of this patent
Estimating the term…
Abstract
The present invention relates to a hemostatic dressing which comprises a plurality of layers that contain resorbable materials and/or coagulation proteins. In particular, the invention includes dressings in which a layer of thrombin is sandwiched between a first and second layer of fibrinogen and wherein the layer of thrombin is not coextensive with the first and/or second layer of fibrinogen. The hemostatic dressings are useful for the treatment of wounded tissue.
Claims24
A hemostatic dressing which comprises:
- (i) a first fibrinogen layer;
- (ii) a thrombin layer adjacent to said first fibrinogen layer;
- and
- (iii) a second fibrinogen layer adjacent to said thrombin layer, wherein the thrombin layer is noncoextensive with the first fibrinogen layer and/or the second fibrinogen layer.
A hemostatic dressing which comprises:
- (i) a resorbable material layer;
- (ii) a first fibrinogen layer adjacent to said resorbable material layer;
- (iii) a thrombin layer adjacent to said first fibrinogen layer;
- and
- (iv) a second fibrinogen layer adjacent to said thrombin layer, wherein the thrombin layer is noncoextensive with the first fibrinogen layer and/or the second fibrinogen layer.
A hemostatic dressing which comprises:
- (i) a first fibrinogen layer;
- (ii) a resorbable material layer adjacent to said first fibrinogen layer;
- (iii) a thrombin layer adjacent to said resorbable material layer;
- and
- (iv) a second fibrinogen layer adjacent to said thrombin layer, wherein the thrombin layer is noncoextensive with the first fibrinogen layer and/or the second fibrinogen layer.
A method for preparing a hemostatic dressing, the method comprising:
- providing a first layer of fibrinogen;
- applying a layer of thrombin to said first layer of fibrinogen;
- and
- applying a second layer of fibrinogen to the layer of thrombin, wherein the layer of thrombin is noncoextensive with the first fibrinogen layer and/or the second fibrinogen layer.
A method for preparing a hemostatic dressing, the method comprising:
- providing a resorbable or nonresorbable backing layer having attached thereto a first layer of fibrinogen;
- applying a layer of thrombin to said first layer of fibrinogen on a side of the fibrinogen layer that is opposite of the side to which the resorbable or nonresorbable backing layer is attached;
- and
- applying a second layer of fibrinogen to the layer of thrombin, wherein the layer of thrombin is noncoextensive with the first fibrinogen layer and/or the second fibrinogen layer.
Dependencies are inferred from the claim text.