Softening catheter
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United States of America Patent
Stats
-
Jul 11, 1989
Grant Date -
N/A
app pub date -
Mar 22, 1988
filing date -
Mar 22, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tubular cannula has distal and proximal end portions, a central passageway from the distal end portion of the proximal portion and a transition section connecting the distal and proximal end portions. The proximal end portion has larger inner and outer diamters and has thicker walls than does the distal end portion. The diameter difference and thickness are effectuated in a gradual manner in a transition section. The cannula is constructed of a material that softens on being inserted into a living body and/or contacted with an aqueous medium. The cannula combines kink resistance external of the living body with the advantages of a softening and generally swellable catheter.
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