Infusion pump, treatment fluid bag therefor, and method for the use thereof
First Claim
1. A pump for infusing intravenous treatment fluid to a patient, said infusion pump comprising:
- a collapsible treatment fluid bag;
an inflatable bladder juxtaposed with said treatment fluid bag;
means to vent said bladder;
means for impinging said bladder against said treatment fluid bag as said bladder is inflated;
means for electronically controlling the pressure of said bladder so as to collapse said treatment fluid bag and controllably expel treatment fluid therefrom; and
an outlet tube in fluid communication with said treatment fluid bag and said patient.
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Accused Products
Abstract
An infusion pump for infusing a medical treatment fluid intravenously to a patient includes a collapsible treatment fluid bag juxtaposed with an inflatable drive fluid bladder confined between a pair of opposing containment members which cause the bladder to impinge against the bag as the bladder is inflated. A drive fluid pump controllably inflates the bladder, thereby displacing treatment fluid from the bag into an outlet tube affixed thereto which conveys the treatment fluid to the patient where it is received intravenously. The treatment fluid flow rate through the tube is controlled by increasing or decreasing the drive fluid pump output and consequently the pressure in the bladder in response to a pressure sensor in fluid communication with the bladder. Alternatively, the treatment fluid flow rate is adjusted by opening or closing the outlet tube by means of an occluder or restrictor positioned along the tube.
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Citations
12 Claims
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1. A pump for infusing intravenous treatment fluid to a patient, said infusion pump comprising:
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a collapsible treatment fluid bag; an inflatable bladder juxtaposed with said treatment fluid bag; means to vent said bladder; means for impinging said bladder against said treatment fluid bag as said bladder is inflated; means for electronically controlling the pressure of said bladder so as to collapse said treatment fluid bag and controllably expel treatment fluid therefrom; and an outlet tube in fluid communication with said treatment fluid bag and said patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A portable pump for infusing intravenous treatment fluid to a patient, said infusion pump comprising:
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a collapsible treatment fluid bag; an inflatable bladder juxtaposed with said treatment fluid bag, wherein said bladder is in fluid communication with a pressure sensor; means for venting said bladder; a containment means for impinging said bladder against said treatment fluid bag as said bladder is inflated, said containment means comprising first and second opposing containment members confining said juxtaposed bladder and fluid bag; an electronic control assembly comprising a drive fluid pump in fluid communication with said bladder for inflating said bladder to collapse said treatment fluid bag and expel treatment fluid therefrom;
wherein said drive fluid pump is also in fluid communication with an electronic control circuit, which is, in turn, in fluid communication with said pressure sensor; andan outlet tube in fluid communication with said treatment fluid bag and said patient. - View Dependent Claims (10, 11, 12)
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Specification