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Filling material for soft tissue implant prostheses and implants made therewith

  • US 5,658,329 A
  • Filed: 02/14/1995
  • Issued: 08/19/1997
  • Est. Priority Date: 02/14/1995
  • Status: Expired due to Term
First Claim
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1. An implantable soft tissue prosthesis comprising:

  • a hollow shell formed of a flexible elastomeric envelope, said shell having an inner volume and an exterior surface, said prosthesis being adapted to be surgically implanted and to retain a desired shape when filled with a filling material;

    said filling material comprising a gel or viscous liquid containing polyacrylamide and derivatives of polyacrylamide having a solid content of such a formulation in the range of 2 to 20%, a viscosity in the range of 15,000 to 75,000 cps and a molecular weight in the range of 200,000 to 1.5 million;

    said filling material having an osmolality in the range of 200 to 400 mOsm/kg, and a radiation penetration comparable with or better than that of 0.9% saline.

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