Medical devices having inflatable portions

Details Medical devices having inflatable portions Medical devices having inflatable portions

1983-11-15

1986-11-25

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604 96, A61M 2900

Patent

active

046246576

ABSTRACT:
A medical device includes a flexible, elongated tube having a continuous, smooth, outer surface, adapted for introduction into the body, and a connection for introducing inflation fluid into the space defined by the length of the tube. The tube is elastomer and the tube wall is in a weakened state while adjacent portions of the tube are not so weakened, the wall of the selected portion having a lower resistance to expansion than adjacent portions. By use of heat-sensitive, annealable plastic, a tube of uniform thickness is weakened at a selected location by annealing. The selected limited-length portion, by reason of its weakened state, is adapted to preferentially respond to pressure of inflation fluid within the tube by expanding transversely to a balloon shape larger than adjacent portions of the tube that are subjected to the same pressure. In a preferred embodiment, the device includes a tube surrounded by a sleeve having the limited-length, preferentially expansive portion and anti-stick means in the preferred form of a porous inner sleeve extends between the outer sleeve and the central member. The outer sleeve extends about the end of the central member to define the lead surface.

REFERENCES:
patent: 3192949 (1965-07-01), DeSee
patent: 3434869 (1969-03-01), Davidson
patent: 3467101 (1969-09-01), Fogarty et al.
patent: 3889685 (1975-06-01), Miller, Jr. et al.
patent: 3924634 (1975-12-01), Taylor et al.
patent: 3983879 (1976-10-01), Todd
patent: 4222384 (1980-09-01), Birtwell
patent: 4254774 (1981-03-01), Boretos
patent: 4265848 (1981-05-01), Rusch
patent: 4350161 (1982-09-01), Davis, Jr.

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