Hybrid LVEDP monitor
First Claim
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1. An apparatus for validating a non-invasively obtained estimate of LVEDP, the apparatus comprising:
- a non-invasive system for obtaining a non-invasive estimate of the LVEDP;
an invasive system for obtaining an invasive estimate of the LVEDP concurrent with the non-invasive system; and
a processor for comparing the non-invasive and invasive estimates of the LVEDP;
wherein the non-invasive system includes;
a first amplitude sensor for non-invasively obtaining a first pressure waveform;
a second amplitude sensor for non-invasively obtaining a second pressure waveform;
an event sensor for detecting a time of occurrence of an event in a cardiac cycle; and
a processor in communication with said first and second amplitude sensors and with said event sensor, said processor being configured to select a segment from each of said first and second waveforms and to connect said segments on the basis of said time of occurrence of said event.
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Abstract
An apparatus for validating a non-invasively obtained estimate of LVEDP includes a non-invasive system for non-invasively obtaining a first estimate of the LVEDP; an invasive system for invasively obtaining a second estimate of the LVEDP concurrent with the first estimate; and a processor for comparing the first and second estimates of the LVEDP.
11 Citations
18 Claims
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1. An apparatus for validating a non-invasively obtained estimate of LVEDP, the apparatus comprising:
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a non-invasive system for obtaining a non-invasive estimate of the LVEDP; an invasive system for obtaining an invasive estimate of the LVEDP concurrent with the non-invasive system; and a processor for comparing the non-invasive and invasive estimates of the LVEDP; wherein the non-invasive system includes; a first amplitude sensor for non-invasively obtaining a first pressure waveform; a second amplitude sensor for non-invasively obtaining a second pressure waveform; an event sensor for detecting a time of occurrence of an event in a cardiac cycle; and a processor in communication with said first and second amplitude sensors and with said event sensor, said processor being configured to select a segment from each of said first and second waveforms and to connect said segments on the basis of said time of occurrence of said event. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for validating a non-invasively obtained estimate of LVEDP, the method comprising:
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non-massively obtaining a first estimate of an LVEDP; invasively obtaining a second estimate of the LVEDP; and comparing the first and second estimates of the LVEDP; wherein non-invasively obtaining a first estimate of an LVEDP includes; non-invasively obtaining a first pressure waveform; non-invasively obtaining a second pressure waveform; detecting a time of occurrence of an event in a cardiac cycle; and selecting a segment from each of the first and second pressure waveforms and connecting the segments on the basis of the time of occurrence of the event. - View Dependent Claims (9, 10, 11, 12)
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13. A hybrid LVEDP monitor for validating a non-invasively obtained estimate of LVEDP, the monitor comprising:
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means for non-invasively obtaining a first estimate of the LVEDP; means for invasively obtaining a second estimate of the LVEDP concurrent with the first estimate; and means for validating the first estimate at least in part on the basis of the second estimate; wherein means for non-invasively obtaining a first estimate of the LVEDP includes; means for non-invasively obtaining a first pressure waveform; means for non-invasively obtaining a second pressure waveform; means for detecting a time of occurrence of an event in a cardiac cycle; and means for selecting a segment from each of the first and second pressure waveforms and connecting the segments on the basis of the time of occurrence of the event. - View Dependent Claims (14, 15, 16, 17)
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18. A computer-readable medium having encoded thereon software for validating a non-invasively obtained estimate of LVEDP, said software comprising instructions for causing a processing system to:
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receive data representative of a non-invasively obtained first estimate of an LVEDP; and receive data representative of an invasively obtained second estimate of the LVEDP; and compare the first and second estimates of the LVEDP; wherein the instructions for causing a computer to receive data representative of a non-invasively obtained first estimate of an LVEDP include instructions for causing a computer to; receive data representative of a non-invasively obtained first pressure waveform; receive data representative of a non-invasively obtained second pressure waveform; detect a time of occurrence of an event in a cardiac cycle; and
toselect a segment from each of the first and second pressure waveforms and to connect the segments on the basis of the time of occurrence of the event.
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Specification