Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Breast prosthesis – Implantable
Patent
1991-08-16
1992-07-28
Green, Randall L.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Breast prosthesis
Implantable
623 7, A61F 212
Patent
active
051337533
ABSTRACT:
The self-sealing tissue expander includes inner and outer layers of relatively nonflowable material and a median layer of flowable material. The median layer of flowable material which can include one or more sublayers of flowable material is under a predetermined compression imposed by the inner and outer layers due to a prestressing of the tissue expander shell during formation of the tissue expander. The self-sealing shell seals an opening in the shell wall following removal of an infusion needle. In all embodiments of the invention a needle stop member is provided to prevent the needle that accesses the fluid chamber from passing outwardly of the tissue expander. The need for a septum, a fluid conduit or a special fluid entry opening in the tissue expander shell is thus optional. The shell can also be made relatively more stretchable in some areas than in other areas.
REFERENCES:
patent: 3919724 (1975-11-01), Sanders et al.
patent: 4164045 (1979-08-01), Bokrus et al.
patent: 4217889 (1980-08-01), Radovan et al.
patent: 4919668 (1990-04-01), Rosenbaum et al.
Bark Jeffrey E.
Hillegass Donald V.
Woodruff Eric J.
Brittingham Debra S.
Green Randall L.
Krieger Stuart E.
Medical Engineering Corporation
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