Surgery – Instruments – Internal pressure applicator
Patent
1992-05-07
1993-08-10
Rosenbaum, C. Fred
Surgery
Instruments
Internal pressure applicator
623 1, 604 96, A61M 2902
Patent
active
052344568
ABSTRACT:
A stent for placement within a body lumen and comprising a wall structure wherein at least a portion thereof is a hollow wall. The hollow wall has disposed therein a hydrophilic material which can be in the form of a gel, for example, which swells upon introduction of a liquid into the hollow wall to thereby achieve inflation thereof. The hollow wall is fabricated of a semi-permeable membrane whereby fluid from tissues surrounding the stent at the site of placement can pass through the membrane and swell the hydrophilic material to thereby inflate the hollow wall. A drug can be disposed with the hydrophilic material for release through the membrane at the site of stent placement. The entire wall structure of the stent can be a hollow wall, or the wall structure can incorporate both hollow and non-hollow wall portions such as hollow and solid fibers which are braided, woven or wound together.
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Akers Lawrence C.
Lee Eric M.
Maglione Corrine
Pfizer Hospital Products Group Inc.
Richardson Peter C.
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