Implantable demand medication delivery assembly
First Claim
1. An implantable demand medication delivery assemably comprising:
- a reservoir means for storing a liquid medication to be delivered;
a pump means in fluid communication with the reservoir means for pumping a selected volume of the liquid medication, the pump means comprising;
a base member having an inlet port in fluid communication with the reservoir means and an outlet port;
a resilient deformable wall extending over the base member and defining a chamber between the resilient deformable wall and base member;
a fluid passage having a first portion extending through the base member between the inlet port and the chamber and a second portion extending between the chamber and the outlet port;
a one-way valve means in the first portion of the fluid passage between the inlet port and chamber for permitting fluid flow toward the chamber; and
a pressure regulated valve means in the second portion of the fluid passage between the chamber and outlet port for selectively permitting fluid flow through such fluid passage at preselected fluid pressures; and
a delivery catheter means connected to the outlet port of the pump means for delivering the liquid medication to a location spaced from the pump means.
3 Assignments
0 Petitions
Accused Products
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.
405 Citations
21 Claims
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1. An implantable demand medication delivery assemably comprising:
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a reservoir means for storing a liquid medication to be delivered; a pump means in fluid communication with the reservoir means for pumping a selected volume of the liquid medication, the pump means comprising; a base member having an inlet port in fluid communication with the reservoir means and an outlet port; a resilient deformable wall extending over the base member and defining a chamber between the resilient deformable wall and base member; a fluid passage having a first portion extending through the base member between the inlet port and the chamber and a second portion extending between the chamber and the outlet port; a one-way valve means in the first portion of the fluid passage between the inlet port and chamber for permitting fluid flow toward the chamber; and a pressure regulated valve means in the second portion of the fluid passage between the chamber and outlet port for selectively permitting fluid flow through such fluid passage at preselected fluid pressures; and a delivery catheter means connected to the outlet port of the pump means for delivering the liquid medication to a location spaced from the pump means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An implantable demand medication delivery assembly comprising:
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a reservoir means for storing a liquid medication to be delivered; a pump means in fluid communication with the reservoir means for pumping a preselected volume of the liquid medication, the pump means comprising; a base member defining a first fluid passage extending from an inlet port to a first port opening on an upper surface of the base member and a second fluid passage extending between a second port opening in the upper surface of the base member to an outlet port; a resilient wall attached to the base member including an encircling dome portion extending over the first and second port openings of the base member to define a chamber between the resilient wall and base member; and a pressure regulated valve means in the second fluid passage for opening to permit fluid flow through the second fluid passage at preselected fluid pressures in the chamber upon actuation of the pump means; and a delivery catheter means connected to the outlet port of the pump means for delivering the liquid medication to a location spaced from the pump means. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification