Hemostatic surgical dressings

• US 3,122,479 A
• Filed: 11/14/1957
• Issued: 02/25/1964
• Est. Priority Date: 11/14/1957
• Status: Expired due to Term

• Current Assignee: David F. Smith
• Original Assignee: David F. Smith
• Inventors: Smith, David F.
• Application Number:
  US03/696,340
• Time in Patent Office: 2,294 Days
• US Class Current: 222/192
• CPC Class Codes: A61L 15/28 Polysaccharides or their derivatives A61L15/225 takes precedence
• CPC Class Codes: A61L 15/64 specially adapted to be resorbable inside the body
• CPC Class Codes: A61L 2400/04 Materials for stopping bleeding
• CPC Class Codes: C08L 1/04 Oxycellulose; Hydrocellulose , e.g. microcrystalline cellulose

Claims

1. A BLOOD-WETTABLE, BLOOD ABSORPTIVE, HEMOSTATIC SURGICAL DRESSING IN SOLID FORM COMPRISING A DEGRADED, BRITTLE, POWDERED, HEMOSTATIC, NO2-OXIDIZED CELLULOSE OF FROM 13 TO 20 PERCENT CO2 EQUIVALENCY, IN WHICH IS SUBSTANTIALLY UNIFORMLY DISPERSED A RELATIVELY WATER-INSOLUBLE, BONDING MATERIAL, ABSORBABLE IN LIVE ANIMAL TISSUE AND SELECTED FROM THE CLASS CONSISTING OF CELLULOSE GLYCOLLIC ACID ETHER, HYDROXYETHYL CELLULOSE GLYCOLLIC ACID ETHER, CELLULOSE HYDROXYPROPIONIC ACID OTHER AND MIXTURE THEREOF.

3. THE PRODUCT OF CLAIM 1 ATTACHED BY THE SAID BONDING MATERIAL TO A FARBIC BACKING MATERIAL.

7. A PACKAGE CONSISTING OF A PRESSURE-TIGHT CONTAINER HAVING A VALVE-CONTROLLED OPENING AND CONTAINING A HEMOSTATIC BLOOD WETTABLE, BLOOD-ABSORPTIVE, DEGRADED, BRITTLE, POWDERED, NO2-OXIDIZED CELLULOSE OF FROM 13 TO 20 PERCENT CO2 EQUIVALENCY;

AND A SUBSTANTIALLY INERT AND NONTOXIC, VOLATILE, LIQUEFIED PROPELLANT.