Medical capsule device actuated by radio-frequency (RF) signal

Details Medical capsule device actuated by radio-frequency (RF) signal Medical capsule device actuated by radio-frequency (RF) signal

1992-01-27

1992-12-01

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

6048911, 128769, A61M 1100

Patent

active

051676265

ABSTRACT:
A medical capsule device for releasing a substance at a defined location in the gastrointestinal tract. The device has a capsule body defining one or more apertures in the circumferential wall thereof and a sleeve valve rotatably positioned therein having one or more corresponding apertures in the circumferential wall thereof. The sleeve valve comprises a coil and electrically connected heatable resistor which are operatively associated with an actuator member formed of a shape memory alloy responsive to heat and which will move from a non-heated first shape to a heated second shape. Actuator stop means are provided in the capsule body for being engaged by the actuator member during movement from the non-heated first shape to the heated second shape so that the actuator member movement will serve to rotate the sleeve valve to an open position.

REFERENCES:
patent: 1707762 (1929-04-01), Homan
patent: 3485235 (1969-12-01), Felson
patent: 4239040 (1980-12-01), Hosoya et al.
patent: 4439197 (1984-03-01), Honda et al.
patent: 4481952 (1984-11-01), Pawelec
patent: 4507115 (1985-03-01), Kambara et al.
patent: 5122128 (1992-06-01), Cardinal et al.

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