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 each having an aliquot volume;
a controller programmed to control an electrical signal to the pumping device, the controller including a program comprising a pump set degradation compensator for changing the electrical signal thereby altering operation of the pumping device, the pump set degradation compensator including a volume compensation element that adjusts the aliquot volume solely as a function of time and selected flow rate based at least on the relationship;
T*Fi(x);
where T is a time of pump set use;
Fi(x) is a pump set flow compensation function based on a user selected flow rate; and
x is the user selected flow rate.
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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.
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Citations
24 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 each having an aliquot volume; a controller programmed to control an electrical signal to the pumping device, the controller including a program comprising a pump set degradation compensator for changing the electrical signal thereby altering operation of the pumping device, the pump set degradation compensator including a volume compensation element that adjusts the aliquot volume solely as a function of time and selected flow rate based at least on the relationship;
T*Fi(x);
where T is a time of pump set use;
Fi(x) is a pump set flow compensation function based on a user selected flow rate; and
x is the user selected flow rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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- 15. A method of facilitating delivery of a fluid through a pump set that is operatively coupled to a pumping apparatus having a controller, the method comprising providing a memory device having computer readable instructions stored thereon that are executable by the controller, the instructions providing an aliquot adjustment factor that adjusts a flow rate of the fluid delivered through the pump set solely as a function of time and selected flow rate based at least on the relationship, T*Fi(x), where T is an amount of time the pump set is installed in the pumping apparatus, Fi(x) is a pump set flow compensation function that is based on a user selected flow rate through the pump set, x is the user selected flow rate through the pump set.
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17. A method of delivering fluid using a pumping apparatus that acts on a pump set attached to the pumping apparatus to produce a flow of fluid in aliquots, each aliquot having a volume, the method comprising:
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determining an amount of time the pump set is installed in the pumping apparatus; determining an aliquot volume adjustment factor as a function of a group of variables consisting of time and selected flow rate based at least on the relationship, T*Fi(x), where T is the determined amount of time the pump set is installed in the pumping apparatus, Fi(x) is a pump set flow compensation function based on a user selected flow rate, and x is the user selected flow rate; and adjusting a flow rate of the fluid through the pump set with the determined aliquot volume adjustment factor. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification