Infusion pump, treatment fluid bag therefor, and method for the use thereof
First Claim
1. A method for infusing intravascular treatment fluid to a patient comprising:
- positioning an inflatable bladder in juxtaposition with a collapsible treatment fluid bag within a confined containment volume formed by first and second opposing containment members, wherein said inflatable bladder is in fluid communication with a pressure sensor;
controllably inflating said bladder, thereby impinging said bladder against said treatment fluid bag, wherein said bladder is controllably inflated by an electronic control assembly comprising a drive fluid pump in fluid communication with said bladder, wherein said drive fluid pump is in operative communication with an electronic control circuit, which is, in turn, in operative communication with the pressure sensor;
collapsing said treatment fluid bag to expel treatment fluid therefrom into an outlet tube in fluid communication with said treatment fluid bag, wherein treatment fluid is controllably expelled from said treatment fluid bag at a predetermined rate; and
displacing said treatment fluid through said outlet tube to the 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.
153 Citations
7 Claims
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1. A method for infusing intravascular treatment fluid to a patient comprising:
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positioning an inflatable bladder in juxtaposition with a collapsible treatment fluid bag within a confined containment volume formed by first and second opposing containment members, wherein said inflatable bladder is in fluid communication with a pressure sensor; controllably inflating said bladder, thereby impinging said bladder against said treatment fluid bag, wherein said bladder is controllably inflated by an electronic control assembly comprising a drive fluid pump in fluid communication with said bladder, wherein said drive fluid pump is in operative communication with an electronic control circuit, which is, in turn, in operative communication with the pressure sensor; collapsing said treatment fluid bag to expel treatment fluid therefrom into an outlet tube in fluid communication with said treatment fluid bag, wherein treatment fluid is controllably expelled from said treatment fluid bag at a predetermined rate; and displacing said treatment fluid through said outlet tube to the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification