Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1984-09-04
1987-01-06
Grieb, William H.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604185, A61M 500
Patent
active
046344276
ABSTRACT:
An implantable demand medication delivery assembly for delivering measured aliquots of liquid medication. The assembly includes a reservoir which stores the liquid medication to be delivered. The assembly also includes a pump which is in fluid communication with the reservoir. The pump includes a housing having an inlet port in fluid communication with the reservoir and an outlet port. Connected to the outlet port is a delivery catheter for delivering the liquid medication to a site within the patient wherein the assembly is implanted. The pump also includes a fluid passage which extends between the inlet and outlet port. A chamber is provided along the fluid passage for containing a preselected volume of liquid medication to be delivered. A resilient deformable wall on the pump extends over the chamber. A one-way valve is provided in the fluid passage between the inlet port and chamber for permitting fluid flow toward the chamber. A pressure regulated valve is provided in the fluid passage between the chamber and outlet port for selectively permitting fluid flow through the delivery catheter upon actuation of the pump. A puncturable and resealable injection site can also be part of the assembly and, when part of the assembly, is in fluid communication with the reservoir.
REFERENCES:
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Medical Progress Through Technology, vol. 9, No. 1, 1982, pp. 17-25, Berlin; G. A. Carlson et al., "An Implantable Remotely Programmable Insulin Infusion System", (p. 1, cols. 1, 2; FIG. 4).
Implantable Drug-Delivery Systems, by Perry Blackshear, Scientific American, Dec. 1979, pp. 66-73.
Insulin Infusion Pumps in the Treatment of Diabetes", by Perry Blackshear, Medical Instrumentation, vol. 16, No. 1, Jan.-Feb. 1982.
Coe Frederick L.
Hannula Donald L.
American Hospital Supply Company
Grieb William H.
Hartenberger Robert E.
Myers Richard L.
Williams Roger A.
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