Fluid delivery device with heat activated energy source
First Claim
Patent Images
1. 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.
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Accused Products
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.
96 Citations
33 Claims
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1. An implantable device for implantation within a patient for infusing medicinal fluid into the patient at a controlled rate comprising:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An implantable device for implantation within a patient for infusing medicinal fluid into the patient at a controlled rate comprising:
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(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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A medical device for implantation within a patient for infusing medicinal fluid into the patient at a controlled rate comprising:
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(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. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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28. An implantable device for infusing medicinal fluid into the patient at a controlled rate comprising:
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(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. - View Dependent Claims (29, 30, 31, 32, 33)
a. a first antenna coupled with said heating coil; and
b. radio frequency transmitting means, including a second antenna disposed proximate said first antenna for controllably heating said heating coil.
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30. The device as defined in claim 29 in which said radio frequency transmitting means includes a controller.
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31. The device as defined in claim 28 in which said polymer gel is contained within a first expandable bellows disposed within said housing.
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32. The device as defined in claim 28 further including a second expandable bellows disposed within said housing and operably associated with said first expandable bellows, said fluid reservoir being formed by said second expandable bellows.
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33. The device as defined in claim 28 further including fill means carried by said housing for filling said reservoir.
Specification