Fluid delivery device with heat activated energy source
AssigneeScience Incorporated
InventorMarshall S. Kriesel
Life of this patent
Estimating the term…
Abstract
An implantable fluid delivery apparatus for infusing medicinal fluids into a patient that includes a novel heat responsive polymer gel material that, upon being heated by a heating coil uniquely functions as an internal energy source for expelling the medicinal fluids from the device.
Claims33
An implantable device for implantation within a patient for infusing medicinal fluid into the patient at a controlled rate comprising:
- (a) a housing having an outlet;
- (b) a fluid reservoir containing a fluid disposed within said housing, said fluid reservoir having an inlet and an outlet in communication with said outlet of said housing;
- (c) a heat stimulated mass disposed within said housing proximate said reservoir, said mass comprising a semi-solid, which upon being stimulated, will act upon said fluid within said reservoir to cause said fluid to flow outwardly of said outlet of said reservoir;
- and
- (d) stimulation means for stimulating said mass, said stimulation means comprising a source of heat.
An implantable device for implantation within a patient for infusing medicinal fluid into the patient at a controlled rate comprising:
- (a) a housing having an outlet;
- (b) a fluid reservoir containing a fluid disposed within said housing, said reservoir having an inlet and an outlet in communication with said outlet of said housing;
- (c) a heat stimulated, expandable polymer gel disposed within said housing, said polymer gel upon being stimulated, expanding to act upon said fluid within said reservoir to cause said fluid to flow outwardly of said outlet of said reservoir;
- and
- (d) stimulation means for stimulating said polymer gel, said stimulation means comprising a source of heat.
A medical device for implantation within a patient for infusing medicinal fluid into the patient at a controlled rate comprising:
- (a) a housing having an outlet;
- (b) a fluid reservoir containing a fluid disposed within said housing, said reservoir having an inlet and an outlet in communication with said outlet of said housing;
- (c) a heat stimulated, swellable polymer disposed within said housing proximate said reservoir, said polymer, upon being stimulated, swelling so as to act upon said fluid within said reservoir to cause said fluid to flow outwardly of said outlet of said reservoir;
- (d) stimulation means for stimulating said expandable polymer, said stimulation means comprising a source of heat;
- and
- (e) delivery means connected to said outlet of said housing for delivering fluid to the patient.
An implantable device for infusing medicinal fluid into the patient at a controlled rate comprising:
- (a) a housing having an outlet, said housing being implantable within the body of the patient;
- (b) a fluid reservoir containing a fluid disposed within said housing, said fluid reservoir having an inlet and an outlet in communication with said outlet of said housing;
- (c) a heat stimulated, expandable mass disposed within said housing proximate said reservoir, said expandable mass comprising a semisolid, which upon being stimulated, will act upon said fluid within said reservoir to cause said fluid to flow outwardly of said outlet of said reservoir;
- and
- (d) stimulation means for stimulating said expandable mass, said stimulation means comprising:
- (i) a heating coil disposed within said housing proximate said expandable mass;
- and
- (ii) means disposed outside the patient's body for heating said heating coil.
Dependencies are inferred from the claim text.