# US 10,765,774 B2 · Hemostatic pad assembly kit and method

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- Number: US 10,765,774 B2
- Document ID: US10765774B2
- Status: Granted
- Kind: B2
- Application number: 13/937,292
- Filed: 2013-07-09
- Published: 2015-01-15
- Granted: 2020-09-08
- Earliest claimed: 2013-07-09
- Assignees: Ethicon, Inc.
- Applicants: Ethicon, Inc.
- Inventors: Randolph W. Hubbell; James Eckhardt; Jerome Riebman; Yufu Li; Michael Elser
- Web page: https://patentgrep.com/patent/US10765774B2

## CPC

- A61L 15/64: specially adapted to be resorbable inside the body
- A61L 15/26: Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof {(A61L15/225 takes precedence)}
- A61L 15/28: Polysaccharides or their derivatives {(A61L15/225 takes precedence)}
- A61L 15/44: Medicaments
- A61L 2300/252: Polypeptides, proteins, e.g. glycoproteins, lipoproteins, cytokines
- A61L 2300/254: Enzymes, proenzymes
- A61L 2300/418: Agents promoting blood coagulation, blood-clotting agents, embolising agents
- A61L 2400/04: Materials for stopping bleeding
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)

## Abstract

The present invention relates generally to agents and devices for promoting hemostasis and tissue sealing and, more particularly, to hemostatic pads comprising bioabsorbable scaffolds that can deliver lyophilized hemostasis promoting proteins, such as fibrinogen and thrombin, to a wound site or injured organ or tissue.

## Claims

### Claim 1

A method of making and using a hemostatic wound treatment device comprising: a bioabsorbable scaffold having a wound facing surface and an opposing surface; and a hemostatic powder that comprises a mixture of fibrinogen and thrombin, the method comprising:
a) wetting the scaffold with the biocompatible liquid that is not blood or plasma selected from the group consisting of an aqueous solution, normal saline, ethanol, and ethanol-water mixture; then
b) contacting the scaffold with the hemostatic powder in dry form in a powder tray onto the wet scaffold and adhering at least a portion of the hemostatic powder to at least the wound facing surface of the scaffold; and then
c) applying the wound facing surface of the hemostatic wound treatment pad onto a wound.

### Claim 2 (depends on 1)

The method of claim 1 wherein the scaffold comprises an oxidized polysaccharide or bioabsorbable synthetic polymer.

### Claim 3 (depends on 1)

The method of claim 1 wherein the scaffold is a multi-layered structured composite material comprising a lactide-glycolide polymer layer and a cellulosic layer comprising oxidized regenerated cellulose.

### Claim 4 (depends on 1)

The method of claim 1 wherein the hemostatic powder adheres to the lactide-glycolide polymer layer and the opposing surface layer comprises the oxidized regenerated cellulose.

### Claim 5 (depends on 1)

The method of claim 1 wherein the time period between initial contact of the scaffold with the hemostatic powder and the subsequent application of the hemostatic wound treatment pad onto the wound is less than two minutes.