Electrochemical controlled dispensing assembly and method for se

Details Electrochemical controlled dispensing assembly and method for se Electrochemical controlled dispensing assembly and method for se

1993-02-03

1994-03-01

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

604141, 604133, 128DIG12, A61M 3700

Patent

active

052902404

ABSTRACT:
An infusion pump assembly (20) is provided which employs electrochemistry to selectively control the delivery rate of a dispensing fluid (21) from a dispensing reservoir (24) by selectively controlling the flow rate of a driving fluid (19) from a driving reservoir (23) to a receiving reservoir (33). A partition (25), separating the driving reservoir from the receiving fluid reservoir, includes at least one aperture (28) which permits flow communication therebetween. As the receiving reservoir increases or expands in size due to receipt of the driving fluid, a barrier member (32) communicates with the dispensing reservoir to expel the dispensing fluid therefrom. The infusion pump assembly includes a disposable infusion pump unit (36) and a separate and remote programming unit (37) operably coupled to a plug member (30), blocking the aperture, for control of the driving fluid flowing through the aperture. The remote electronic programming unit can be calibrated to administer the proper infusate flow rate by selectively controlling the corresponding flow rate of driving fluid. A method of controlled infusion of an infusate employing electrochemistry is also provided.

REFERENCES:
patent: 4874500 (1989-10-01), Madou et al.
patent: 4886514 (1989-12-01), Maget
patent: 4902278 (1990-02-01), Maget et al.
patent: 5090963 (1992-02-01), Gross et al.
Espenscheid, M. W., et al., "Electroactive Ion Exchange Polymers", J. Electroanal. Chem., 188:73 (1985).
McCarty, L. H., "A Valve On A Chip!", Design News, p. 111 (1992).

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