Back to results
US 4,373,519 AGranted
Composite wound dressing
AssigneeMinnesota Mining and Manufacturing Company
InventorsLouis A. Errede, James D. Stoesz, George D. Winter, deceased
Life of this patent
Estimating the term…
Abstract
A composite wound dressing, optionally having controlled permeability, is highly absorbent toward blood and exudate and comprises a polytetrafluoroethylene fibril matrix, hydrophilic absorptive particles enmeshed in the matrix, and, optionally, a partially occlusive film coated on one surface of the matrix.
Claims18
A composite wound-dressing which is a sheet material, comprising:
- (a) a polytetrafluoroethylene fibril matrix,
- (b) 0.5 to 10 parts of hydrophilic absorptive particles per part of PTFE by weight enmeshed in said matrix, the absorptive particles having absorptive capacity greater than 0.5 grams of water per gram of dry particles, and
- (c) a partially occlusive film coated on one surface of said matrix,
- wherein substantially all of said hydrophilic absorptive particles are unavailable for sloughing.
1 more element
A method of treating a wound comprising applying to said wound a composite wound-dressing which is a sheet material comprising:
- (a) a polytetrafluoroethylene fibril matrix;
- and
- (b) 0.5 to 10 parts of hydrophilic absorptive particles per part of PTFE by weight enmeshed in said matrix, the absorptive particles having absorptive capacity greater than 0.5 grams of water per gram of dry particles,
- wherein substantially all of said hydrophilic absorptive particles are unavailable for sloughing.
1 more element
Dependencies are inferred from the claim text.