Fluid delivery apparatus with an additive
First Claim
Patent Images
1. A device for use in infusing fluids into an ambulatory patient at a controlled rate comprising:
- (a) a base having an upstanding portion including a fluid inlet passageway and a fluid outlet said fluid outlet and said fluid inlet passageways being interconnected by a fluid flow path;
(b) filling means for introducing fluid into said fluid inlet passageway, said filling means including filling check valve means for controlling the flow of fluid into said fluid inlet passageway;
(c) a distendable membrane constructed of an elastic material which is fitted over said base to define a chamber in communication with said fluid inlet and said fluid outlet, said membrane being distendable by fluid introduced into said chamber under pressure through said fluid inlet, said membrane having a tendency to return to a less distended configuration whereby fluid within said chamber will be expelled through said fluid outlet;
(d) adding means disposed within said fluid flow path for adding an additive to fluid flowing therethrough.
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Abstract
An apparatus for accurately infusing medicinal agents into an ambulatory patient at specific rates over extended periods of time. The apparatus is of a compact, low profile, laminate construction and includes an elastic distendable membrane, which, in cooperation with a thin planar base, defines a fluid chamber having a fluid outlet. Disposed within the fluid chamber is a thin fluid permeable member which precisely controls the rate of fluid flow through the fluid outlet.
128 Citations
33 Claims
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1. A device for use in infusing fluids into an ambulatory patient at a controlled rate comprising:
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(a) a base having an upstanding portion including a fluid inlet passageway and a fluid outlet said fluid outlet and said fluid inlet passageways being interconnected by a fluid flow path; (b) filling means for introducing fluid into said fluid inlet passageway, said filling means including filling check valve means for controlling the flow of fluid into said fluid inlet passageway; (c) a distendable membrane constructed of an elastic material which is fitted over said base to define a chamber in communication with said fluid inlet and said fluid outlet, said membrane being distendable by fluid introduced into said chamber under pressure through said fluid inlet, said membrane having a tendency to return to a less distended configuration whereby fluid within said chamber will be expelled through said fluid outlet; (d) adding means disposed within said fluid flow path for adding an additive to fluid flowing therethrough. - View Dependent Claims (2, 3, 4, 5)
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6. A device for use in infusing fluids into an ambulatory patient at a controlled rate comprising:
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(a) a base having a fluid inlet, a fluid outlet passageway, and a fluid passageway interconnecting said fluid inlet and said fluid outlet passageway; (b) filling means for introducing fluid into said fluid inlet; (c) a distendable membrane constructed of an elastic material which is fitted over said base to define a chamber in communication with said fluid passageway, and with said membrane being distendable by fluid introduced into said chamber under pressure through said fluid inlet passageway and having a tendency to return to a less distended configuration whereby fluid within said chamber will be expelled through said fluid outlet; and (d) adding means disposed within said fluid outlet passageway for adding an additive to fluid flowing therethrough, said adding means comprising a support and an additive removably connected to said support. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A device for use in infusing beneficial agents into a patient at a controlled rate comprising:
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(a) a base having a fluid inlet, a fluid outlet passageway and a fluid passageway interconnecting said fluid inlet and said fluid outlet; (b) filling means for introducing fluid into said fluid inlet; (c) a distendable membrane constructed of an elastic material which is fitted over said base to define a chamber in communication with said fluid outlet passageway, said membrane distendable by fluid introduced into said chamber under pressure through said fluid passageway and having a tendency to return to a less distended configuration whereby fluid within said chamber will be expelled through said fluid outlet; (d) adding means mounted within said fluid outlet passageway for adding an additive to fluid introduced by said filling means, said adding means comprising; (i) additive presentation means disposed within said fluid passageway for presenting an additive to the fluid flowing therethrough; and (ii) an additive substantially removably interconnected to said additive presentation means using affinity chromotography immobilization techniques. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A device for use in infusing beneficial agents into a patient at a controlled rate comprising:
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(a) a base having a fluid inlet, a fluid outlet and a fluid passageway interconnecting said fluid inlet and said fluid outlet; (b) filling means for introducing fluid into said fluid inlet; (c) a distendable membrane constructed of an elastic material which is fitted over said base to define a chamber in communication with said fluid passageway, said membrane being distendable by fluid introduced into said chamber under pressure through said fluid passageway and having a tendency to return to a less distended configuration whereby fluid within said chamber will be expelled through said fluid outlet; and (d) adding means for adding an additive to fluid introduced by said filling means, said adding means comprising; (i) additive presentation means disposed within said fluid passageway for presenting an additive to the fluid flowing therethrough; and (ii) an additive removably interconnected to said additive presentation means for removal using affinity chromotography techniques. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification