Textured tissue expander

• US 5,092,348 A
• Filed: 03/28/1990
• Issued: 03/03/1992
• Est. Priority Date: 01/17/1989
• Status: Expired due to Term

• Current Assignee: Allergan, Inc. (Canada) (Abbvie Incorporated)
• Original Assignee: McGhan Medical Corporation (Abbvie Incorporated)
• Inventors: Dubrul, Will R., Maxwell, G. Patrick
• Primary Examiner(s): Isabella, David J.
• Application Number:
  US07/500,221
• Time in Patent Office: 706 Days
• Field of Search: 623/7, 623/8, 623/11, 623/12, 606/190, 606/191, 606/192, 128/899
• US Class Current: 128/899
• CPC Class Codes: A61B 90/02 Devices for expanding tissue, e.g. skin tissue implements for holding wounds open, surgical tractors A61B17/02; implantable mammary prosthesis A61F2/12; dilators A61M29/00
• CPC Class Codes: A61F 2/12 Mammary prostheses and implants

Abstract

An implantable tissue expansion device with an external surface layer of silicon elastomer, at least a portion of which contains a texture or open cell sturcture. The textured surface is expected to decrease subsequent capsular contracture and provide a non-skid surface to hold the device in position and permit differential expansion.

Claims

1. An improved tissue expansion device for temporary surgical implantation beneath the skin and for removal upon predetermined expansion of the overlying tissue, the device comprising an expandable biocompatible envelope forming an expandable fluid-tight chamber, an injection reservoir in fluid communication with the chamber, the injection reservoir comprising means for injecting fluid into the chamber from a hypodermic needle which punctures the injection reservoir, and said envelope having a textured outer surface over at least a portion of said envelope.

2. The improvement of claim 1 wherein the textured surface is of an open-celled configuration.

3. A tissue expander for temporary implantation, comprising an expandable outer shell enclosing an expandable lumen for temporary implantation beneath the skin thereafter to be inflated to stretch and expand the overlying tissue, and at least a portion of the outer surface of said shell being textured.