Surgery – Controlled release therapeutic device or system – Implanted dynamic device or system
Patent
1987-12-15
1989-06-13
Pellegrino, Stephen C.
Surgery
Controlled release therapeutic device or system
Implanted dynamic device or system
604246, 128DIG12, A61M 3100
Patent
active
048388874
ABSTRACT:
An implantable valve accumulator pump for the delivery of medication is disclosed. The implantable pump comprises a drug reservoir maintained a constant pressure vapor. The medication metering assembly comprises a fixed volume accumulator positioned between a pair of valves. The valves alternately open and close to admit medication from the reservoir into the accumulator and to dispense a precise volume spike to an outlet catheter. In order to minimize dead volume and insure complete discharge, the accumulator employs a titanium diaphragm seated in one position by a recessed stop and in the discharge position by a spacer plate having a groove pattern. The unit is externally programmed.
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patent: 3923060 (1975-12-01), Elllinwood, Jr.
patent: 4193397 (1980-03-01), Tucker et al.
patent: 4261356 (1981-04-01), Turner et al.
patent: 4360019 (1982-11-01), Portner et al.
patent: 4482346 (1984-11-01), Reinicke
patent: 4486190 (1984-12-01), Reinicke
patent: 4525165 (1985-06-01), Fischell
patent: 4594058 (1986-06-01), Fischell
Pellegrino Stephen C.
Shiley Infusaid Inc.
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