Fluid delivery device with temperature controlled energy source
First Claim
1. A device for use in infusing medicinal fluid into a patient at a controlled rate comprising:
- (a) a housing having a rigid surface and including a base defining a heat sink and a cover superimposed over said base;
(b) distendable means for forming, in conjunction with said rigid surface of said housing, a fluid reservoir having an inlet and an outlet, said distendable means comprising at least one distendable membrane at least a portion of which is movable within said housing from a first position to a second position;
(c) heat expandable means disposed within said housing between said heat sink and said cover and in proximity to said distendable membrane, said heat expandable means comprising a semi-solid, which, upon being heated, will act upon said distendable membrane to move said membrane toward said second position to cause fluid within said reservoir to flow outwardly of said outlet of said reservoir; and
(d) infusion means in communication with said outlet of said reservoir for infusing fluid from said fluid reservoir into the patient.
4 Assignments
0 Petitions
Accused Products
Abstract
A fluid delivery apparatus for infusing medicinal fluids into a patient which is of a compact, low profile, laminate construction. The apparatus embodies a novel thermal expanding polymer material which uniquely functions as an internal energy source for expelling the medicinal fluids from the device. The apparatus can be used for subdermal, intradermal and intramuscular infusion of fluids and in one form of the invention, includes a novel delivery cannula having a body portion disposed within a circuitous channel formed within the base superstructure of the apparatus and a pierceable portion which extends outwardly from the base of the apparatus. By constructing the cannula in a circuitous configuration and dynamically connecting it to the base assembly, movement of the cannula relative to the base assembly is permitted thereby minimizing needle related tissue necrosis. The heat-expandable mass which is heated by the patient'"'"'s body temperature in a manner to controllably expel fluid from the device uniquely functions to provide a conformable ullage within the reservoir of the device which will effectively avoid extended flow delivery rate trail-off at the end of the fluid delivery period. Further, the heat expandable mass can be specifically tailored to provide precise, predictable protocol delivery of the medicinal agent stored within the reservoir of the device.
120 Citations
21 Claims
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1. A device for use in infusing medicinal fluid into a patient at a controlled rate comprising:
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(a) a housing having a rigid surface and including a base defining a heat sink and a cover superimposed over said base;
(b) distendable means for forming, in conjunction with said rigid surface of said housing, a fluid reservoir having an inlet and an outlet, said distendable means comprising at least one distendable membrane at least a portion of which is movable within said housing from a first position to a second position;
(c) heat expandable means disposed within said housing between said heat sink and said cover and in proximity to said distendable membrane, said heat expandable means comprising a semi-solid, which, upon being heated, will act upon said distendable membrane to move said membrane toward said second position to cause fluid within said reservoir to flow outwardly of said outlet of said reservoir; and
(d) infusion means in communication with said outlet of said reservoir for infusing fluid from said fluid reservoir into the patient. - View Dependent Claims (2, 3, 4, 5)
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6. A device for use in infusing medicinal fluid into a patient at a controlled rate comprising:
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(a) a housing having surface and a fluid flow channel, said housing comprising a base and a cover superimposed over said base;
(b) distendable means for forming, in conjunction with said surface of said housing, a fluid reservoir having an outlet, said distendable means comprising at least one distendable membrane disposed between said cover and said base, at least a portion of said membrane being movable within said housing from a first position to a second position;
(c) heat expandable means disposed within said housing in proximity with said distendable membrane, said heat expandable means, upon being heated, acting upon said distendable membrane to move said membrane toward said second position to cause fluid within said reservoir to flow outwardly of said outlet of said reservoir;
(d) infusion means in communication with said outlet of said reservoir for infusing fluid from said fluid reservoir into the patient; and
(e) flow indicator means disposed within said reservoir for indicating fluid flow from said reservoir.
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7. A device for use in infusing medicinal fluid into a patient at a controlled rate comprising:
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(a) a housing having a rigid surface;
(b) distendable means for forming, in conjunction with said rigid surface of said housing, a fluid reservoir having an inlet and an outlet, said distendable means comprising at least one distendable membrane at least a portion of which is movable within said housing from a first position to a second position;
(c) a heat expandable gel disposed within said housing in proximity to said distendable membrane, said heat expandable gel, upon being heated, acting upon said distendable membrane to move said membrane toward said second position to cause fluid within said reservoir to flow outwardly of said outlet of said reservoir; and
(d) fill means in communication with said inlet of said fluid reservoir for filling said reservoir with fluid, said fill means comprising a liquid container interconnectable with said housing; and
(e) infusion means in communication with said outlet of said reservoir for infusing fluid from said fluid reservoir into the patient. - View Dependent Claims (8, 9)
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10. A device for use in infusing medicinal fluid into a patient at a controlled rate comprising:
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(a) a housing having a rigid surface and a socket (b) distendable means for forming, in conjunction with said rigid surface of said housing, a fluid reservoir having an inlet and an outlet, said distendable means comprising at least one distendable membrane at least a portion of which is movable within said housing from a first position to a second position;
(c) heat expandable means disposed within said housing between said rigid surface and said distendable membrane, said heat expandable means comprising a semi-solid, which, upon being heated, will act upon said distendable membrane to move said membrane toward said second position to cause fluid within said reservoir to flow outwardly of said outlet of said reservoir;
(d) infusion means in communication with said outlet of said reservoir for infusing fluid from said fluid reservoir into the patient, said infusion means comprising an elongated fill tube and a subcutaneous infusion device connected to and spaced apart from said housing for infusing fluid from said reservoir into said patient; and
(e) means for interconnecting said infusion means with said housing, said means comprising a quick connect mechanism for quickly interconnecting said fill tube with said housing, said quick connect mechanism comprising;
(i) a hub at least partially receivable in said socket in said housing; and
(ii) at least one yieldably deformable arm connected to said hub for releasably gripping said housing.
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11. A device for use in infusing medicinal fluid into a patient at a controlled rate comprising:
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(a) a housing having a rigid surface and a socket (b) distendable means for forming, in conjunction with said rigid surface of said housing, a fluid reservoir having an inlet and an outlet, said distendable means comprising at least one distendable membrane at least a portion of which is movable within said housing from a first position to a second position;
(c) heat expandable means disposed within said housing between said rigid surface and said distendable membrane, said heat expandable means comprising a semi-solid, which, upon being heated, will act upon said distendable membrane to move said membrane toward said second position to cause fluid within said reservoir to flow outwardly of said outlet of said reservoir;
(d) infusion means in communication with said outlet of said reservoir for infusing fluid from said fluid reservoir into the patient, said infusion means comprising an elongated fill tube and a subcutaneous infusion device connected to and spaced apart from said housing for infusing fluid from said reservoir into said patient; and
(e) means for interconnecting said infusion means with said housing, said means comprising a quick connect mechanism for quickly interconnecting said fill tube with said housing, said quick connect mechanism comprising;
(ii) a hub at least partially receivable in said socket in said housing; and
(ii) release means for releasably locking said hub in position within said socket. - View Dependent Claims (12)
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13. A device for use in infusing medicinal fluid into a patient at a controlled rate comprising:
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(a) a housing having a rigid surface;
(b) distendable means for forming, in conjunction with said rigid surface of said housing, a fluid reservoir having an inlet and an outlet, said distendable means comprising at least one distendable membrane at least a portion of which is movable within said housing from a first position to a second position;
(c) heat expandable means disposed within said housing between said rigid surface and said distendable membrane, said heat expandable means comprising a plurality of polymers disposed in a laminated assemblage, each of said polymers, upon being heated, acting upon said distendable membrane to move said membrane toward said second position to cause fluid within said reservoir to flow outwardly of said outlet of said reservoir; and
(d) infusion means in communication with said outlet of said reservoir for infusing fluid from said fluid reservoir into the patient. - View Dependent Claims (14, 15)
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16. A device for use in infusing medicinal fluid into a patient at a controlled rate comprising:
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(a) a housing having a rigid surface;
(b) distendable means for forming, in conjunction with said rigid surface of said housing, a fluid reservoir having an inlet and an outlet, said distendable means comprising at least one distendable membrane at least a portion of which is movable within said housing from a first position to a second position;
(c) a heat-expandable, three-dimensional gel network disposed within said housing in proximity to said distendable membrane, said heat expandable gel, upon being heated, changes in volume so as to act upon said distendable membrane to move said membrane toward said second position to cause fluid within said reservoir to flow outwardly of said outlet of said reservoir;
(d) fill means in communication with said inlet of said fluid reservoir for filling said reservoir with fluid;
(e) infusion means in communication with said outlet of said reservoir for infusing fluid from said fluid reservoir into the patient; and
(f) flow control means disposed between said outlet of said reservoir and said infusion means for controlling fluid flow toward said infusion means. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification