Catheter placement by pressurizable tubular guiding core

Details Catheter placement by pressurizable tubular guiding core Catheter placement by pressurizable tubular guiding core

1995-04-17

1996-03-12

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604 96, A61M 3700

Patent

active

054982391

ABSTRACT:
A catheter is provided with steering capability at its distal end by a tubular guiding member which protrudes from an opening at the distal end of the catheter and either changes shape or rotates about its longitudinal axis upon pressurization from the proximal end. In one means of actuation, the tubular member has one or more ports close to its distal end, which form laterally directed jets when the tubular member is pressurized within by fluid, the reaction force of the jets bending the tubular member in the desired direction or causing it to rotate. In another means of actuation, the tubular member either curves upon pressurization from an otherwise straight configuration upon pressurization, or straightens from an otherwise curved configuration. The tubular member can expand upon pressurization to seize the interior of the catheter body, rending both elements movable as a unit. Once the catheter is fully positioned, the tubular member can be withdrawn and replaced by functional devices or guidewires.

REFERENCES:
patent: 4403985 (1983-09-01), Boretos
patent: 4475902 (1984-10-01), Schubert
patent: 4717381 (1988-01-01), Papantonsakos
patent: 4769006 (1988-09-01), Papantonsakos
patent: 4826087 (1989-05-01), Chinery
patent: 5085635 (1992-02-01), Cragg
patent: 5345937 (1994-09-01), Middleman et al.
patent: 5352198 (1994-10-01), Goldenberg et al.
patent: 5376074 (1994-12-01), Buchbinder et al.

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