Balloon catheter apparatus with releasable distal seal and metho

Details Balloon catheter apparatus with releasable distal seal and metho Balloon catheter apparatus with releasable distal seal and metho

1989-10-23

1992-01-07

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

604 99, 604 96, A61M 2502

Patent

active

050786814

ABSTRACT:
A balloon catheter apparatus is used in combination with an endoscope having an insertion portion to be inserted in a body cavity. The apparatus comprises a catheter to be connected to a manipulating section, the catheter including an elongated tube through which the insertion portion is inserted, and in which a liquid is fed. The tube includes a balloon capable of being inflated outward in accordance with a liquid pressure in the tube, a first cylindrical portion for connecting the balloon to the manipulating section and defining a liquid path together with the inserted insertion portion, and a second cylindrical portion, which is connected to the balloon, and through which a distal end portion of the insertion portion is caused to protrude outward. The second cylindrical portion is brought into contact with the insertion portion to provide an elastic liquid-tight seal between the second cylindrical portion and the inssertion portion. The seal is released by a liquid pressure in the liquid path which exceeds a predetermined liquid pressure, thereby feeding the liquid in the liquid path outward through the second cylindrical portion.

REFERENCES:
patent: 3640282 (1972-02-01), Kamen et al.
patent: 3905361 (1975-09-01), Hewson et al.
patent: 3913565 (1975-10-01), Kawanara
patent: 4029104 (1977-06-01), Kerber
patent: 4798586 (1989-01-01), Stevens
patent: 4813934 (1989-03-01), Engelson et al.
patent: 4875897 (1989-10-01), Lee
patent: 4921478 (1990-05-01), Solano et al.
patent: 4932959 (1990-06-01), Horzewski et al.

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