CONTINUOUS NON-INVASIVE BLOOD PRESSURE MEASUREMENT APPARATUS AND METHODS PROVIDING AUTOMATIC RECALIBRATION
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Accused Products
Abstract
A blood pressure measurement system is configured to perform a calibration automatically when a calibration condition is satisfied. The calibration condition is based upon one or more parameters of pulse waves of a subject. The parameters may include pulse wave area; a time difference between systolic peak and reflected wave peak or dichrotic notch in the pulse wave and a shape of at least a portion of the pulse wave.
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Citations
24 Claims
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1. (canceled)
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2. A method for operating a blood pressure measurement system, comprising:
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activating a blood pressure detector to obtain a first blood pressure measurement of a subject; detecting, by a pulse oximetry sensor, a pulse wave signal from the subject comprising a plurality of individual pulses; determining a morphology metric of one or more the individual pulses of the pulse wave signal; quantifying a difference between the morphology metric and a template; and triggering the blood pressure detector to obtain a second blood pressure measurement of the subject when the difference passes a threshold. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for operating a blood pressure measurement system, comprising:
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activating a blood pressure detector to obtain a first blood pressure measurement of a subject; detecting, by a pulse oximetry sensor, a pulsatile signal from the subject, the pulsatile signal comprising a plurality of pulses; determining first and second morphology parameters of the plurality of pulses; comparing the first morphology parameter to a first reference, and the second morphology parameter to a second reference; evaluating a new measurement condition based on the comparisons; and when the new measurement condition is satisfied, triggering the blood pressure detector to obtain a second blood pressure measurement of the subject. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method for operating a blood pressure measurement system, comprising:
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detecting a pulse wave signal of a subject; monitoring a morphology characteristic of the pulse wave signal over time; storing a reference characteristic; comparing the monitored characteristic to the reference characteristic; evaluating a new measurement condition based on the comparison; and triggering a blood pressure measurement when the new measurement condition is satisfied. - View Dependent Claims (21, 22, 23, 24)
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Specification