METHODS AND DEVICES FOR MONITORING THE INTEGRITY OF A FLUID CONNECTION
First Claim
1. A method for monitoring the integrity of a fluid connection between first and second fluid containing systems based on at least one time-dependent measurement signal from at least one pressure sensor in the first fluid containing system, wherein the first fluid containing system comprises a first pulse generator, and the second fluid containing system comprises a second pulse generator, and wherein said at least one pressure sensor is arranged to detect first pulses originating from the first pulse generator and second pulses originating from the second pulse generator, said method comprising:
- receiving said at least one time-dependent measurement signal;
generating, based on said at least one time-dependent measurement signal, a time-dependent monitoring signal in which the first pulses are essentially eliminated;
calculating a parameter value based on signal values within a time window in the time-dependent monitoring signal, the parameter value representing a distribution of the signal values; and
determining the integrity of the fluid connection based at least partly on the parameter value.
1 Assignment
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Accused Products
Abstract
A surveillance device monitors the integrity of a fluid connection between first and second fluid containing systems based on at least one time-dependent measurement signal from a pressure sensor in the first fluid containing system. The first fluid containing system comprises a first pulse generator, and the second fluid containing system comprises a second pulse generator. The pressure sensor is arranged to detect first pulses originating from the first pulse generator and second pulses originating from the second pulse generator. The integrity of the fluid connection is determined based on the presence of second pulses in the measurement signal. The second pulses may be detected by analysing the measurement signal in the time domain and/or by using timing information indicative of the timing of the second pulses in said at least one measurement signal. The analysis may be based on a parameter value that represents a distribution of signal values within a time window of the measurement signal. The parameter value may be calculated as a statistical dispersion measure of the signal values, or may result from a matching of the signal values within the time window to a predicted temporal signal profile of a second pulse. The fluid connection may be established between a human blood system and an extracorporeal blood flow circuit.
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Citations
46 Claims
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1. A method for monitoring the integrity of a fluid connection between first and second fluid containing systems based on at least one time-dependent measurement signal from at least one pressure sensor in the first fluid containing system, wherein the first fluid containing system comprises a first pulse generator, and the second fluid containing system comprises a second pulse generator, and wherein said at least one pressure sensor is arranged to detect first pulses originating from the first pulse generator and second pulses originating from the second pulse generator, said method comprising:
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receiving said at least one time-dependent measurement signal; generating, based on said at least one time-dependent measurement signal, a time-dependent monitoring signal in which the first pulses are essentially eliminated; calculating a parameter value based on signal values within a time window in the time-dependent monitoring signal, the parameter value representing a distribution of the signal values; and determining the integrity of the fluid connection based at least partly on the parameter value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A device for monitoring the integrity of a fluid connection between first and second fluid containing systems based on at least one time-dependent measurement signal from at least one pressure sensor in the first fluid containing system, wherein the first fluid containing system comprises a first pulse generator, and the second fluid containing system comprises a second pulse generator, and wherein said at least one pressure sensor is arranged to detect first pulses originating from the first pulse generator and second pulses originating from the second pulse generator, said device comprising:
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an input for said at least one measurement signal; and a signal processor connected to said input, said signal processor comprising a processing module configured to generate, based on said at least one measurement signal, a time-dependent monitoring signal in which the first pulses are essentially eliminated, and to calculate a parameter value based on signal values within a time window in the monitoring signal, the parameter value representing a distribution of the signal values, said signal processor being configured to determine the integrity of the fluid connection based at least partly on the parameter value.
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26. A device for monitoring the integrity of a fluid connection between first and second fluid containing systems based on at least one time-dependent measurement signal from at least one pressure sensor in the first fluid containing system, wherein the first fluid containing system comprises a first pulse generator, and the second fluid containing system comprises a second pulse generator, and wherein said at least one pressure sensor is arranged to detect first pulses originating from the first pulse generator and second pulses originating from the second pulse generator, said device comprising:
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means for receiving said at least one measurement signal; means for generating, based on said at least one measurement signal, a time-dependent monitoring signal in which the first pulses are essentially eliminated; means for calculating a parameter value based on signal values within a time window in the monitoring signal, the parameter value representing a distribution of the signal values; and means for determining the integrity of the fluid connection based at least partly on the parameter value.
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27. A method for monitoring the integrity of a fluid connection between first and second fluid containing systems based on at least one time-dependent measurement signal from at least one pressure sensor in the first fluid containing system, wherein the first fluid containing system comprises a first pulse generator, and the second fluid containing system comprises a second pulse generator, and wherein said at least one pressure sensor is arranged to detect first pulses originating from the first pulse generator and second pulses originating from the second pulse generator, said method comprising:
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receiving said at least one measurement signal; obtaining timing information indicative of the timing of the second pulses in said at least one measurement signal; processing said at least one measurement signal based on the timing information, to calculate a parameter value indicative of presence or absence of the second pulses; and determining the integrity of the fluid connection based at least partly on the parameter value. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A device for monitoring the integrity of a fluid connection between first and second fluid containing systems based on at least one time-dependent measurement signal from at least one pressure sensor in the first fluid containing system, wherein the first fluid containing system comprises a first pulse generator, and the second fluid containing system comprises a second pulse generator, and wherein said at least one pressure sensor is arranged to detect first pulses originating from the first pulse generator, and second pulses originating from the second pulse generator, said device comprising:
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an input for said at least one measurement signal; and a signal processor connected to said input and comprising a processing module configured to obtain timing information indicative of the timing of the second pulses in said at least one measurement signal, and to process said at least one measurement signal based on the timing information so as to generate a parameter value indicative of presence or absence of the second pulses, said signal processor being configured to determine the integrity of the fluid connection based at least partly on the parameter value.
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46. A device for monitoring the integrity of a fluid connection between first and second fluid containing systems based on at least one time-dependent measurement signal from at least one pressure sensor in the first fluid containing system, wherein the first fluid containing system comprises a first pulse generator, and the second fluid containing system comprises a second pulse generator, and wherein said at least one pressure sensor is arranged to detect first pulses originating from the first pulse generator, and second pulses originating from the second pulse generator, said device comprising:
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means for receiving said at least one measurement signal; means for obtaining timing information indicative of the timing of the second pulses in said at least one measurement signal; means for processing said at least one measurement signal based on the timing information, to generate a parameter value indicative of presence or absence of the second pulses, and means for determining the integrity of the fluid connection based at least partly on the parameter value.
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Specification