Aliquot correction for feeding set degradation
First Claim
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1. A pumping apparatus for use with a pump set to deliver fluid through the pump set, the pumping apparatus comprising:
- a pumping device capable of acting on the pump set to produce a fluid flow within the pump set, the pumping device producing said fluid flow in a series of aliquots;
a housing capable of receiving at least a portion of the pump set to be acted upon by the pumping device;
a controller programmed to control an electrical signal to the pumping device, the controller including a pump set degradation compensator for changing the electrical signal thereby altering operation of the pumping device whereby the fluid flow rate delivered by the pumping apparatus is more accurate over the useful life of the pump set.
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Abstract
A peristaltic pump is able to deliver accurate volumes over the life of a pump set that is operated on by the pump to drive the flow of fluid. The pump delivers fluid in small volumes or aliquots. In order to deliver fluid at any particular selected flow rate, the pump determines how often the rotor will rotate. The pump is able to calculate aliquot volume based on selected flow rate, but also on a factor that compensates for changes in the dimensions of the pump set over its life.
53 Citations
28 Claims
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1. A pumping apparatus for use with a pump set to deliver fluid through the pump set, the pumping apparatus comprising:
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a pumping device capable of acting on the pump set to produce a fluid flow within the pump set, the pumping device producing said fluid flow in a series of aliquots;
a housing capable of receiving at least a portion of the pump set to be acted upon by the pumping device;
a controller programmed to control an electrical signal to the pumping device, the controller including a pump set degradation compensator for changing the electrical signal thereby altering operation of the pumping device whereby the fluid flow rate delivered by the pumping apparatus is more accurate over the useful life of the pump set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of delivering accurate flow rates of fluid using a pumping apparatus that acts on a pump set attached to the pumping apparatus to produce flow of fluid in aliquots, the method comprising:
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determining the amount of time the pump set has been in use in the pumping apparatus;
calculating the volume of fluid in each aliquot delivered by the pumping apparatus including executing instructions that are capable of correcting the aliquot volume based on the amount of time the pump set has been in use in the pumping apparatus;
operating the pumping apparatus to deliver a number of aliquots having the aliquot volume determined in the preceding step to maintain a selected flow rate. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification