Variable rate infusion apparatus with indicator and adjustable rate control
First Claim
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1. A device in infusing medicinal fluid into a patient at a controlled rate comprising:
- (a) a housing having outlet passageway;
(b) a stored energy means disposed within said housing for forming a fluid reservoir having an inlet and an outlet in communication with said outlet passageway of said housing, said stored energy means comprising at least one generally planar distendable member, said member being distendable as a result of pressure imparted by fluids to establish internal stresses, said stresses tending to move said member toward a less distended configuration;
(c) fluid flow control means carried by said housing for controlling the rate of fluid flow from said reservoir toward said outlet passageway of said housing, said fluid flow control means comprising a rate control film rotatably connected to said housing intermediate said reservoir outlet and said outlet passageway, said rate control film having first and second spaced apart porous areas, said film being rotatable from a first position wherein said first porous area is aligned with said outlet of said reservoir and said outlet passageway and a second position wherein said second porous area is aligned with said outlet of said reservoir and said outlet passageway.
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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, chamber having a fluid outlet. The apparatus also includes a highly novel fluid flow indicator that provides a readily discernible visible indication of fluid flow through the apparatus. Additionally, the apparatus includes a novel adjustable flow rate control means for precisely adjustably controlling the rate of fluid flow from the reservoir of the device.
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Citations
15 Claims
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1. A device in infusing medicinal fluid into a patient at a controlled rate comprising:
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(a) a housing having outlet passageway;
(b) a stored energy means disposed within said housing for forming a fluid reservoir having an inlet and an outlet in communication with said outlet passageway of said housing, said stored energy means comprising at least one generally planar distendable member, said member being distendable as a result of pressure imparted by fluids to establish internal stresses, said stresses tending to move said member toward a less distended configuration;
(c) fluid flow control means carried by said housing for controlling the rate of fluid flow from said reservoir toward said outlet passageway of said housing, said fluid flow control means comprising a rate control film rotatably connected to said housing intermediate said reservoir outlet and said outlet passageway, said rate control film having first and second spaced apart porous areas, said film being rotatable from a first position wherein said first porous area is aligned with said outlet of said reservoir and said outlet passageway and a second position wherein said second porous area is aligned with said outlet of said reservoir and said outlet passageway. - 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 a bottom portion and an outlet passageway;
(b) a stored energy means disposed within said housing for forming a fluid reservoir having an inlet and an outlet in communication with said outlet passageway of said housing, said stored energy means comprising a least one generally planar distendable member, said member being distendable as a result of pressure imparted by fluids to establish internal stresses, said stresses tending to move said member toward a less distended configuration;
(c) fluid flow control means carried by said housing for controlling the rate of fluid flow from said reservoir toward said outlet passageway of said housing, said fluid flow control means comprising a control knob rotatably connected to said housing intermediate said reservoir outlet and said outlet passageway, said control knob having first and second spaced apart porous rate control frits, said control knob being rotatable from a first position wherein said first porous rate control frit is aligned with said outlet of said reservoir and said outlet passageway and a second position wherein said second porous rate control frit is aligned with said outlet of said reservoir and said outlet passageway. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A device for use in infusing medicinal fluid into a patient at a controlled rate comprising:
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(a) a fluid dispenser including;
(i) a housing having a base, having an upper portion and a lower portion;
(ii) a stored energy means for forming, in conjunction with said upper portion of said base, a fluid reservoir having an inlet and an outlet, said stored energy means comprising at least one distendable member superimposed over said upper portion of said base, said member being distendable as a result of pressure imparted by the fluids to be infused to establish internal stresses, said stresses tending to move said member toward a less distended configuration (iii) an outlet passageway formed in said base for communication with said outlet of said fluid reservoir (b) fluid flow control means carried by said base for controlling the rate of fluid flow from said reservoir toward said outlet passageway, said fluid flow control means comprising a control knob rotatably connected to said base intermediate said reservoir outlet and said outlet passageway, said control knob being accessible from said lower portion of said base and having first and second spaced apart rate control fits, said control knob being rotatable from a first position wherein said first rate control frit is aligned with said outlet of said reservoir and said outlet passageway and a second position wherein said second rate control fit is aligned with said outlet of said reservoir and said outlet passageway;
(c) infusion means in communication with said outlet passageway for infusing fluid from said reservoir into the patient and (d) filling means connected to said housing for filling said reservoir. - View Dependent Claims (13, 14, 15)
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Specification