Automatic infiltration detection system and method
First Claim
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1. An infusion system for infusing a fluid into a patient comprising:
- an infusion device for delivering the fluid, said infusion device including means for delivering the fluid in a normal delivery pattern and for delivering a test pulse of the fluid with the test pulse being distinguishable from the normal delivery pattern;
conduit means for conducting the fluid from the infusion device to the patient, said test pulse creating a pressure wave response in the conduit means;
means for determining the area between a baseline and at least a portion of a pressure versus time curve representing the pressure wave response; and
means responsive to the magnitude of said area for detecting if the fluid is being improperly supplied by the conduit means to the patient.
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Abstract
An infusion system for infusing a fluid into a patient comprising an infusion device for delivering the fluid in both a normal delivery pattern and a test pulse and a conduit for conducting the fluid from the infusion device to the patient. The test pulse creates a pressure wave response in the conduit. Abnormal infusion can be detected by determining the area between a baseline and at least a portion of a pressure versus time curve representing the pressure wave response.
193 Citations
45 Claims
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1. An infusion system for infusing a fluid into a patient comprising:
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an infusion device for delivering the fluid, said infusion device including means for delivering the fluid in a normal delivery pattern and for delivering a test pulse of the fluid with the test pulse being distinguishable from the normal delivery pattern; conduit means for conducting the fluid from the infusion device to the patient, said test pulse creating a pressure wave response in the conduit means; means for determining the area between a baseline and at least a portion of a pressure versus time curve representing the pressure wave response; and means responsive to the magnitude of said area for detecting if the fluid is being improperly supplied by the conduit means to the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for determining if a fluid is being properly supplied to a patient by an infusion system, said method comprising:
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delivering the fluid through conduit means to a patient'"'"'s vascular system in a normal delivery pattern and in a test pulse, with the test pulse being distinguishable from the normal delivery pattern and with the test pulse creating a pressure wave response in the conduit means; determining the area between a baseline and at least a portion of a pressure versus time curve representing the pressure wave response; and using the magnitude of said area to detect if the fluid is being improperly supplied by the conduit means to the patient. - View Dependent Claims (9, 10, 11, 12)
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13. An apparatus for determining if fluid is being properly supplied through a fluid delivery system to a patient, said apparatus comprising:
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means for delivering fluid through the delivery system so as to create a pressure wave response in the delivery system; means for determing the area between a baseline and at least a portion of a pressure versus time curve representing the pressure wave response; and means responsive to the magnitude of said area for detecting if the fluid is being improperly supplied by the fluid delivery system to the patient. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. An infusion system for infusing a fluid into a patient comprising:
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an infusion device for delivering the fluid, said infusion device including means for delivering the fluid in a normal delivery pattern and for delivering the fluid in an altered pattern, said altered pattern including a test pulse and leading and trailing separating regions on opposite sides of the test pulse each of which provides a different flow rate of fluid than the adjacent portions of the test pulse; conduit means for conducting the fluid from the infusion device to the patient, said test pulse creating a pressure wave response in the conduit means; means for establishing a baseline as a function of the pressure in the conduit means when the test pulse is not present; means for determining the area between said baseline and a pressure versus time curve representing the pressure wave response between about the start of the pressure wave response and a truncation point which occurs after a peak value of the pressure wave response and before the end of the pressure wave response; and means responsive to the magnitude of said area for detecting if the fluid is being improperly supplied by the conduit means to the patient. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39)
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40. An infusion system for infusing a fluid into a patient comprising:
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an infusion device for delivering the fluid, said infusion device including means for delivering the fluid in a normal delivery pattern and for delivering a test pulse of the fluid with the test pulse being distinguishable from the normal delivery pattern; conduit means for conducting the fluid from the infusion device to the patient, said test pulse creating a pressure wave response in the conduit means; first means responsive to the pressure of the fluid in the conduit means during the normal delivery pattern to ascertain if pressure conditions in the conduit means are suitable for detecting if fluid is being improperly supplied by the conduit means to the patient; and means responsive to the pressure wave response for detecting if fluid is being improperly supplied by the conduit means to the patient. - View Dependent Claims (41, 42)
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43. An apparatus for determining if fluid is being properly supplied through a fluid delivery system to a patient, said apparatus comprising:
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means for delivering fluid through the delivery system so as to create a pressure wave response in the delivery system; first means responsive to the pressure in the delivery system when the pressure wave response is not present to ascertain if pressure conditions in the delivery system are suitable for detecting if fluid is being improperly supplied by the delivery system to the patient; and means responsive to the pressure wave response for detecting if fluid is being improperly supplied by the delivery system to the patient. - View Dependent Claims (44, 45)
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Specification