Systems and methods for monitoring hemodynamic status
First Claim
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1. A system for use in assessment of a patient'"'"'s hemodynamic status comprising:
- one or more devices comprising;
a first sensor to measure a first signal from tissue of a patient, anda second sensor to measure a second signal from tissue of the patient from a different location along a circulatory path from the patient'"'"'s heart than the first sensor, wherein the one or more devices are configured to periodically measure the first and second signals over a monitoring time period; and
an external monitoring device wirelessly operatively coupled to the one or more devices and configured to;
receive data representative of the first and second signals from the one or more devices;
determine a pulse transit time based on the data representative of the first and second signals for each measurement of the first and second signals resulting in a plurality of pulse transit times for the monitoring time period; and
determine a surrogate hemodynamic status value based on the plurality of pulse transit times representative of the patient'"'"'s aggregate hemodynamic status for the monitoring time period.
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Abstract
The exemplary systems and methods may monitor one or more signals to be used to assess the hemodynamic status of a patient. The one or more signals may be used to calculate, or determine, a plurality of pulse transit times. The plurality of pulse transit times may be used to determine hemodynamic status values that may be indicative of a patient'"'"'s aggregate hemodynamic status.
23 Citations
21 Claims
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1. A system for use in assessment of a patient'"'"'s hemodynamic status comprising:
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one or more devices comprising; a first sensor to measure a first signal from tissue of a patient, and a second sensor to measure a second signal from tissue of the patient from a different location along a circulatory path from the patient'"'"'s heart than the first sensor, wherein the one or more devices are configured to periodically measure the first and second signals over a monitoring time period; and an external monitoring device wirelessly operatively coupled to the one or more devices and configured to; receive data representative of the first and second signals from the one or more devices; determine a pulse transit time based on the data representative of the first and second signals for each measurement of the first and second signals resulting in a plurality of pulse transit times for the monitoring time period; and determine a surrogate hemodynamic status value based on the plurality of pulse transit times representative of the patient'"'"'s aggregate hemodynamic status for the monitoring time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for use in assessing a patient'"'"'s hemodynamic status comprising:
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periodically measuring a first signal from tissue of a patient and a second signal from tissue of the patient in a different location along a circulatory path from the patient'"'"'s heart than where the first signal is measured over a monitoring time period; receiving data representative of the first and second signals; determining a pulse transit time based on the data representative of the first and second signals for each measurement of the first and second signals resulting in a plurality of pulse transit times for the monitoring time period; and determining a hemodynamic status value based on the plurality of pulse transit times representative of the patient'"'"'s aggregate hemodynamic status for the monitoring time period. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A system for use in assessment of a patient'"'"'s hemodynamic status comprising:
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one or more devices comprising; a pulse generator to generate a pulse in tissue of a patient, and a sensor to measure a signal from tissue of the patient from a different location along a circulatory path from the patient'"'"'s heart than the pulse generator, wherein the one or more devices are configured to periodically deliver a pulse and measure the signal over a monitoring time period; and an external monitoring device wirelessly operatively coupled to the one or more devices and configured to; receive a time stamp corresponding to the delivery of the pulse and data representative of the signal from the one or more devices; determine a pulse transit time based on the time stamp and the data representative of the signal for each pulse delivery and measurement of the signal resulting in a plurality of pulse transit times for the monitoring time period; and determine a surrogate hemodynamic status value based on the plurality of pulse transit times representative of the patient'"'"'s hemodynamic status for the monitoring time period.
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Specification