Infusion pump actuators, system and method for controlling medical fluid flowrate
First Claim
Patent Images
1. An infusion pump comprising:
- an actuator having an output shaft;
a plurality of members, at least two of the members in a first hinged communication with the output shaft, and at least two of the members in a second hinged communication with each other, at least one of the first and second hinged communications formed via at least one hinge pin, such that the members at an output shaft actuated distance (x) create flat contact areas with tubing inserted within the members, and wherein remaining non-contact areas of the a tubing are at least substantially circular in shape; and
a logic implementer configured to use a calculated cross-sectional area of the tubing at the output shaft actuated distance (x) to control the actuator to obtain a desired flowrate.
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Accused Products
Abstract
An infusion pump includes an actuator having an output shaft; a pump actuator having a length (lactuator) moved by the output shaft and in contact with tubing, such that the pump actuator at an output shaft actuated distance (x) creates flat contact areas with the tubing, and wherein remaining non-contact areas of the tubing are at least substantially circular in shape; and a logic implementer configured to use at least two relationships to solve for a same number of variables to calculate a cross-sectional area of the tubing at an output shaft actuated distance (x).
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Citations
22 Claims
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1. An infusion pump comprising:
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an actuator having an output shaft; a plurality of members, at least two of the members in a first hinged communication with the output shaft, and at least two of the members in a second hinged communication with each other, at least one of the first and second hinged communications formed via at least one hinge pin, such that the members at an output shaft actuated distance (x) create flat contact areas with tubing inserted within the members, and wherein remaining non-contact areas of the a tubing are at least substantially circular in shape; and a logic implementer configured to use a calculated cross-sectional area of the tubing at the output shaft actuated distance (x) to control the actuator to obtain a desired flowrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An infusion pump comprising:
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an actuator having an output shaft;
a pump actuator having a plurality of members, at least two of the members in a first hinged communication with the output shaft, and at least two of the members in a second hinged communication with each other, at least one of the first and second hinged communications formed via at least one hinge pinthe pump actuator having a length (lactuator) moved by the output shaft and in contact with a tubing, such that the plurality of members of the pump actuator at an output shaft actuated distance (x) create flat contact areas with the tubing, and wherein remaining non-contact areas of the tubing are at least substantially circular in shape; and a logic implementer configured to use at least two relationships to solve for a same number of variables to calculate a cross-sectional area of the tubing at the output shaft actuated distance (x). - View Dependent Claims (11, 12, 13)
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14. An infusion pump comprising:
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an actuator having an output shaft; first and second members in a first hinged communication with the output shaft; a third member in a second hinged communication with the first member; a fourth member in a third hinged communication with the second member, at least one of the first, second, and third hinged communications provided via at least one hinge pin; and the third and fourth members held mechanically such that when the actuator is actuated in a first direction, a tube section extending through the members is compressed to expel a fluid from the tube section and when the actuator is actuated in a second direction, the tube section is decompressed to draw fluid into the tube section. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification