Multi-lumen high profile mammary implant

• US 4,650,487 A
• Filed: 10/06/1981
• Issued: 03/17/1987
• Est. Priority Date: 10/27/1980
• Status: Expired due to Fees

• Current Assignee: Memorial Hospital For Cancer & Allied Diseases Incorporated
• Original Assignee: Memorial Hospital For Cancer & Allied Diseases Incorporated
• Inventors: Chaglassian, Toros A.
• Primary Examiner(s): Apley, Richard J.
• Assistant Examiner(s): ISABELLA, DAVID J
• Application Number:
  US06/309,142
• Time in Patent Office: 1,988 Days
• Field of Search: 3/36, 623/7, 623/8, 128/1 R
• 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: C08L 83/04 Polysiloxanes

Abstract

A surgically implantable, multi-lumen, high profile mammary implant includes a first, flexible, elastic lumen at least partly filled with a soft gel material and having a front wall approximating the shape of a human breast and a second, firmer, flexible lumen within the first lumen and connected thereto solely at the rear wall of the first lumen. The second lumen has a volume which is less than the volume of the first lumen and is at least partly filled with a second soft gel material. A third lumen preferably inflatably surrounds the first lumen and is inflated with saline solution. The second lumen is made firmer than any other lumen of the implant by providing it with a greater percent fill than any other lumen of the multi-lumen implant, filling it with a material which has a greater density than any materials filling any other lumen of the implant, providing it with thicker walls than any other lumen, or by filling it with material which has a greater crosslink density than the materials filling any of the other lumens. The multi-lumen structure has a high profile implant which is most suitable for breast reconstruction.

Claims

1. A surgically-implantable, multi-lumen, high-profile mammary implant, said implant comprising first and second lumens, said second lumen being contained within said first lumen, wherein:

(a) said first lumen has a front wall with an outer shape for approximating the shape of the human breast and a rear wall with an outer shape for approximating the shape of the human chest wall;

(b) said second lumen is connected to said first lumen at said rear wall;

(c) said second lumen contains a soft gel;

(d) said first lumen contains said second lumen and, between said first and second lumens, a soft gel;

(e) means rendering said gel-containing second lumen as a whole firmer than said gel-containing first lumen; and

(f) said second lumen is in the general shape of a cone section with the tip projecting outwardly away from the rear wall of the implant.

3. An implant according to claims 1 or 2, wherein said means comprises filling said second lumen with soft gel to a higher percent fill than said first lumen.

4. An implant according to claims 1 or 2, wherein said means comprises said second lumen containing a soft gel having a higher density than the soft gel contained between said first and second lumens.

5. An implant according to claims 1 or 2, wherein said means comprises said second lumen containing a soft gel having a greater crosslink density than the soft gel contained between said first and second lumens.

6. An implant according to claims 1 or 2, wherein said means comprises said second lumen having a firmer wall than the front wall of said first lumen.

7. An implant according to claims 1 or 2, said implant comprising an inflatable third lumen, said first lumen being contained within said third lumen, wherein said third lumen has:

(a) a flexible front wall with an outer shape for approximating the shape of the human breast when inflated;

(b) a rear wall with an outer shape for approximating the shape of the human chest wall; and

(c) valve means permitting inflation and deflation of the space between said first and third lumens.

2. A surgically-implantable, multi-lumen, high-profile mammary implant, said implant comprising first and second lumens, said second lumen being contained within said first lumen, wherein:

(a) said first lumen has a front wall with an outer shape for approximating the shape of the human breast and a rear wall with an outer shape for approximating the shape of the human chest wall;

(b) said second lumen is connected to said first lumen at said rear wall;

(c) said second lumen contains a soft gel;

(d) said first lumen contains said second lumen and, between said first and second lumens, a soft gel;

(e) means rendering said gel-containing second lumen as a whole firmer than said gel-containing first lumen;

(f) said gel-containing second lumen is sufficiently firm to provide said implant with a projection-to-weight ratio of at least about 0.1 mm/gm bsed upon the weight of said implant; and

(g) said second lumen is in the general shape of a cone section with the tip projecting outwardly away from the rear wall of the implant.

8. A surgically-implantable, multi-lumen, high-profile mammary implant, said implant comprising a first lumen having a front wall with an outer shape for approximating the shape of the human breast and a rear wall with an outer shape for approximating the shape of the human chest wall;

a second lumen contained within said first lumen; and

a third lumen, said third lumen being inflatable, having a flexible front wall with an outer shape for approximating the shape of the human breast and a rear wall with an outer shape for approximating the shape of the human chest wall, and containing said first lumen, wherein;

(a) said second lumen contains soft gel and is connected to said first lumen at said rear wall;

(b) said first lumen contains a soft gel between said first and second lumens;

(c) means rendering said gel-containing second lumen as a whole firmer than said gel-containing first lumen;

(d) said third lumen comprises valve means permitting inflation and deflation of the space between said first and third lumens;

(e) said third lumen, between said first and third lumens, contains a liquid compatible with the human body;

(f) said gel-containing second lumen is sufficiently firm to provide said implant with a projection-to-weight ratio of at least about 0.1 mm/gm based upon the weight of said implant; and

(g) said second lumen is in the general shape of a cone section with the tip projecting away from the rear wall of the implant.

10. An implant according to claim 8 or 9, wherein said liquid is saline.

11. An implant according to claim 8 or 9, wherein said means comprises filling said second lumen with soft gel to a higher percent fill than said first lumen.

12. An implant according to claim 8 or 9, wherein said means comprises said second lumen containing a soft gel having a higher density than the soft gel contained between said first and second lumens.

13. An implant according to claim 8 or 9, wherein said means comprises said second lumen containing a soft gel having a greater crosslink density than the soft gel contained between said first and second lumens.

14. An implant according to claim 8 or 9, wherein said means comprises said second lumen having a firmer wall than the wall of said first lumen.

9. A surgically-implantable, multi-lumen, high-profile mammary implant, said implant comprising a first lumen having a front wall with an outer shape for approximating the shape of the human breast and a rear wall with an outer shape for approximating the shape of the human chest wall;

a second lumen contained within said first lumen; and

a third lumen, said third lumen being inflatable, having a flexible front wall with an outer shape for approximating the shape of the human breast and a rear wall with an outer shape for approximating the shape of the human chest wall, and containing said first lumen, wherein;

(a) said second lumen contains soft gel and is connected to said first lumen at said rear wall;

(b) said first lumen contains a soft gel between said first and second lumens;

(c) means rendering said gel-containing second lumen as a whole firmer than said gel-containing first lumen;

(d) said third lumen comprises valve means permitting inflation and deflation of the space between said first and third lumens;

(e) said third lumen, between said first and third lumens, contains a liquid compatible with the human body; and

(f) said second lumen is in the general shape of a cone section with the tip projecting outwardly away from the rear wall of the implant.