Inelastic noiseless air bag in a breast implant
An implantable device includes a first sealed flexible shell configured for implantation within a breast of a human subject, an elastic filler material contained within the first sealed flexible shell, and a second sealed flexible, inelastic shell, which is disposed within the elastic filler material inside the first sealed flexible shell and is inflated with a volume of gas. The second shell includes a material selected such that a root-mean-square (RMS) sound pressure caused by a deformation of the second shell not exceeding 50 mm does not exceed 20 micro-Pascals.
1. An implantable device, comprising:
a first sealed flexible shell configured for implantation within a breast of a human subject;
an elastic filler material contained within the first sealed flexible shell;
a second sealed flexible, inelastic shell, which is disposed within the elastic filler material inside the first sealed flexible shell and is inflated with a volume of gas, the second shell comprising a material selected such that a root-mean-square (RMS) sound pressure caused by a deformation of the second shell not exceeding 50 mm does not exceed 20 micro-Pascals.
2. The implantable device according to claim 1 , wherein the material comprises a composite of polyamide and polyurethane.
3. The implantable device according to claim 1 , wherein the elastic filler material comprises silicone gel.
4. The implantable device according to claim 1 , wherein the volume of gas comprises a volume of air.
5. A method for manufacturing an implantable device, the method comprising:
providing a first sealed flexible shell configured for implantation within a breast of a human subject;
filling the first sealed flexible shell with an elastic filler material;
providing a second sealed flexible, inelastic shell fabricated of a material selected such that a root-mean-square (RMS) sound pressure caused by a deformation of the second shell not exceeding 50 mm does not exceed 20 micro-Pascals;
inflating the second sealed flexible shell with a volume of gas; and
disposing the second sealed flexible, inelastic shell within the elastic filler material inside the first sealed flexible shell.
6. The method according to claim 5 , wherein the material comprises a composite of polyamide and polyurethane.
7. The method according to claim 5 , wherein filling the first sealed flexible shell comprises filling the first shell with silicone gel.
8. The method according to claim 5 , wherein inflating the second sealed flexible, inelastic shell comprises inflating the second shell with air.