Surgical hemostat comprising oxidized cellulose

• US 4,626,253 A
• Filed: 10/05/1984
• Issued: 12/02/1986
• Est. Priority Date: 10/05/1984
• Status: Expired due to Term

• Current Assignee: Johnson & Johnson Medical Incorporated (Johnson & Johnson)
• Original Assignee: Johnson & Johnson Services Incorporated (Johnson & Johnson)
• Inventors: Broadnax, Cecil H. Jr.
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US06/657,997
• Time in Patent Office: 788 Days
• Field of Search: 128/334, 128/335, 128/155, 128/156, 128/325, 536/56, 604/362, 604/358
• US Class Current: 604/374
• CPC Class Codes: A61F 13/01034 characterised by a property
• CPC Class Codes: A61F 13/20 Tampons, e.g. catamenial tampons; Accessories therefor
• CPC Class Codes: A61F 13/36 Surgical swabs, e.g. for absorbency or packing body cavities during surgery A61F13/38 takes precedence
• CPC Class Codes: A61F 13/8405 Additives, e.g. for odour, disinfectant or pH control
• CPC Class Codes: A61F 2013/00106 emergency bandages, e.g. for first aid
• CPC Class Codes: A61F 2013/00238 characterised by way of knitting or weaving
• CPC Class Codes: A61F 2013/00472 with chemical means
• CPC Class Codes: A61L 15/28 Polysaccharides or their derivatives A61L15/225 takes precedence
• CPC Class Codes: A61L 2400/04 Materials for stopping bleeding
• CPC Class Codes: C08L 1/04 Oxycellulose; Hydrocellulose , e.g. microcrystalline cellulose
• CPC Class Codes: D04B 21/00 Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes

Abstract

A surgical hemostat comprising oxidized cellulose having a warp knit tricot construction which provides a fabric density of at least 0.03 g/cm², air porosity of less than 150 cm³ /sec/cm², and liquid absorption of at least 3 times the dry weight of the fabric.

Claims

1. A surgical hemostat comprising a warp knit tricot fabric constructed of yarns of oxidized cellulose, said yarns being derived from bright rayon yarns of about 40 to 80 total denier, said fabric having a density of at least 0.03 g/cm², air porosity of less than 150 cm³ /sec/cm², and liquid absorption of at least 3 times the dry weight of the fabric and at least 0.1 g water per cm² of fabric.

2. The hemostat of claim 1 wherein said bright rayon yarn contains from 10 to 25 filaments.

3. The hemostat of claim 2 wherein said yarn contains 18 filaments and has a total denier of 60.

4. The hemostat of claim 3 wherein said tricot fabric has a density of about 0.05 g/cm², air porosity of about 60 cm³ /sec/cm² and liquid absorption of about 3.8 times the dry weight of the fabric.

5. A surgical hemostat comprising a warp knit tricot fabric constructed of oxidized cellulose yarn of about 40 to 80 denier, said fabric having a density of at least 0.03 g/cm², air porosity of less than 150 cm³ /sec/cm², and liquid absorption of at least 3 times the dry weight of the fabric and at least 0.1 g water per cm² of fabric.

6. The hemostat of claim 5 wherein the knit construction is as follows:

front bar 1-0, 10-11

back bar 2-3, 1-0

and the ratio of back bar to front bar runners is about 2.7.

7. The hemostat of claim 6 wherein the front bar runner is about 190 inches and the back bar runner is about 70 inches.

8. The hemostat of claim 6 having a density of about 0.05 g/cm², air porosity of about 60 cm³ /sec/cm², and liquid absorption of about 3.8 times the dry weight of the fabric.

9. The hemostat of claim 6 wherein said tricot fabric is a 32 gauge, 12 inch quality fabric.