METHODS AND SYSTEM FOR ASSESSMENT OF PERIPHERAL PERFUSION
First Claim
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1. A method for assessing peripheral perfusion in a subject, comprising:
- generating a first blood volume measurement during a measurement time interval using a first blood volume measurement device at a first peripheral location of the subject;
generating a second blood volume measurement during a measurement time interval using a second blood volume measurement device at a second peripheral location of the subject;
determining a first diastolic trough based on the first blood volume measurement;
determining a first systolic peak based on the first blood volume measurement;
determining a first systolic time duration based on the first diastolic diastolic trough and the first systolic peak;
determining a second diastolic trough based on the second blood volume measurement;
determining a second systolic peak based on the second blood volume measurement;
determining a second systolic time duration based on the second diastolic trough and the second systolic peak; and
assessing peripheral perfusion based at least in part on a ratio of linear functions of the first systolic time duration and the second systolic time duration.
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Abstract
The present technology is directed to apparatuses, systems, and methods for assessing absolute and relative peripheral perfusion. In various embodiments, two blood volume measurement devices measure the blood volume at a patient'"'"'s extremities either simultaneously or in series. Distortions between the waveforms generated by the two blood volume measurement devices are detected, and an assessment of the patient'"'"'s perfusion is determined based on the degree of distortion.
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16 Claims
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1. A method for assessing peripheral perfusion in a subject, comprising:
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generating a first blood volume measurement during a measurement time interval using a first blood volume measurement device at a first peripheral location of the subject; generating a second blood volume measurement during a measurement time interval using a second blood volume measurement device at a second peripheral location of the subject; determining a first diastolic trough based on the first blood volume measurement; determining a first systolic peak based on the first blood volume measurement; determining a first systolic time duration based on the first diastolic diastolic trough and the first systolic peak; determining a second diastolic trough based on the second blood volume measurement; determining a second systolic peak based on the second blood volume measurement; determining a second systolic time duration based on the second diastolic trough and the second systolic peak; and assessing peripheral perfusion based at least in part on a ratio of linear functions of the first systolic time duration and the second systolic time duration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for assessing peripheral perfusion, comprising:
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a first blood volume measurement device for generating a first blood volume measurement during a measurement time interval at a first peripheral location; a second blood volume measurement device for generating a second blood volume measurement during a measurement time interval at a second peripheral location; a peripheral perfusion assessment device for receiving the first blood volume measurement and the second blood volume measurement, wherein the peripheral perfusion assessment device; determines a first diastolic trough based on the first blood volume measurement; determines a first systolic peak based on the first blood volume measurement; determines a first systolic time duration based on the first diastolic trough and the first systolic peak; determines a second diastolic trough based on the second blood volume measurement; determines a second systolic peak based on the second blood volume measurement; determines a second systolic time duration based on the second diastolic trough and the second systolic peak; and assesses peripheral perfusion based at least in part on a ratio of linear functions of the first systolic time duration and the second systolic time duration. - View Dependent Claims (14, 15, 16)
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Specification