Programmable valve pump
AssigneeShiley Infusaid Inc.
InventorSamir F. Idriss
Life of this patent
Estimating the term…
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.
Claims27
An implantable infusion apparatus comprising:
- a housing containing,
- a rechargeable positive pressure infusate reservoir,
- an electronically controlled metering assembly receiving infusate from said reservoir, said metering assembly comprising a pair of normally closed valves and an accumulator positioned in fluid communication with each of said valves,
- electronic means for controlling the operation of said valves, and
- an outlet in fluid communication with said metering assembly to dispense infusate to a site in a living body, wherein when a first of said valves is open, infusate flows from said reservoir into said accumulator and when the other valve is open and the first closes, infusate flows from said accumulator into said outlet, said accumulator storing and discharging predetermined volume spikes of infusate at a frequency determined by the cycling rate of said pair of valves.
An implantable infusion apparatus comprising:
- a sealed housing having an inlet septum,
- a rechargeable positive pressure infusate reservoir in said housing,
- metering means in said housing receiving infusate from said reservoir, said metering means comprising first and second valves and a fixed volume accumulator positioned in fluid communication with each of said valves,
- electronic means in said housing for controlling the operation of said valves, such that when a first of said valves is open, infusate flows from said reservoir into said accumulator to fill said accumulator and when the second valve is open and the first valve closes, infusate flows from said accumulator and an outlet in fluid communication with said metering means to dispense infusate to a site in a living body, whereby infusate dispensed in a series of predetermined volume spikes, the frequency of said spikes determined by the cycling rate of said first and second valves.
Dependencies are inferred from the claim text.