Cast gel implantable prosthesis

• US 4,470,160 A
• Filed: 11/21/1980
• Issued: 09/11/1984
• Est. Priority Date: 11/21/1980
• Status: Expired due to Term

• Current Assignee: Joseph F. Cavon
• Original Assignee: Joseph F. Cavon
• Inventors: Cavon, Joseph F.
• Primary Examiner(s): FRINKS, RONALD
• Application Number:
  US06/209,021
• Time in Patent Office: 1,390 Days
• Field of Search: 3/36, 3/1, 128/DIG. 21
• US Class Current: 623/8
• CPC Class Codes: A61F 2/12 Mammary prostheses and implants
• CPC Class Codes: A61L 27/18 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 27/34 Macromolecular materials
• CPC Class Codes: C08L 1/04 Oxycellulose; Hydrocellulose , e.g. microcrystalline cellulose
• CPC Class Codes: C08L 67/04 Polyesters derived from hydroxycarboxylic acids, e.g. lactones C08L67/06 takes precedence
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C08L 89/00 Compositions of proteins; Compositions of derivatives thereof foodstuff preparations A23J3/00
• CPC Class Codes: Y10S 128/21 Silicone

Abstract

A cast elastomer gel implantable prosthesis for implantation in the human body. The cohesive cast gel prosthesis is formed for subcutaneous implantation and may be subsequently coated with a membrane-thin elastomer or a dissolvable envelope so that when it is implanted, it will retain its natural softness after the human tissue capsule forms around the prosthesis.

Claims

1. A prosthesis for implantation in a human body comprising:

a homogeneous gel elastomer formed to fit the shape and size of a cavity in the human body;

said elastomer gel being cohesive and having a consistency as measured by a penetrometer of less than about 30 mm; and

a dissolvable envelope around said gel form implant which dissolves in a period of time after implantation.

2. A prosthesis according to claim 1 wherein said gel form implant is substantially circular and has an ovular cross-sectional shape whereby said gel form may be used as a mammary implant.

3. A prosthesis according to claim 2, wherein said gel form implant includes integrally attached fixation patches for securing said implant to body tissue.

4. A prosthesis according to claim 1 wherein said gel form implant has a consistency as measured by a penetrometer in the range of approximately 0.1 mm to 29 mm.

5. The prosthesis according to claim 1 wherein said dissolvable envelope is comprised of a material selected from the group consisting of gel foam, oxidized regenerated cellulose, polyglycolic acid and polyglactin.

6. The prosthesis according to claim 5 including a topical thrombin with said dissolvable envelope to minimize bleeding after implantation.

7. A method of implanting a natural feeling prosthesis in a human body comprising:

forming said prosthesis of cohesive cast gel in the shape and size desired;

encapsulating said cohesive cast gel prosthesis in a dissolvable material;

making an incision in the human body at the area to be implanted;

inserting said cohesive cast gel implant at the area of the human body desired;

closing the incision whereby the human body forms a tissue capsule around said cohesive cast gel implant.

8. The method according to claim 7 wherein said step of encapsulating comprises encapsulating said cohesive cast gel implant in a material selected from the group consisting of gel foam oxidized regenerated cellulose, polyglycolic acid and polyglactin.

9. The method according to claim 8 in which said dissolvable material includes a topical thrombin to minimize bleeding after implantation.

10. The method according to claim 7 in which said prosthesis is formed in a substantially circular shape having a substantially ovular cross-sectional shape whereby said prosthesis may be used as a mammary implant.

11. The method according to claim 10 including attaching fixation patches to said prosthesis for securing said prosthesis to body tissue.