Rapid non-invasive blood pressure measuring device
First Claim
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1. A measurement device for determining the blood pressure of a patient by finding a time when transmural pressure is approximately equal to zero, the measurement device comprising:
- a piezo-electric speaker, configured to perturbs at least one of pressure and volume of an artery of a patient;
a pressure transducer configured to be placed sufficiently near a measurement site to detect a signal indicative of an oscillation response when the piezo-electric speaker perturbs the at least one of pressure and volume; and
a processor coupled to the pressure transducer, wherein the processor is configured to identify a time when transmural pressure is approximately equal to zero.
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Abstract
A measurement device for generating an arterial volume-indicative signal includes an exciter and a detector. The exciter is adapted to receive an oscillating signal and generate a pressure wave based at least in part on the oscillating signal on the artery at a measurement site on a patient. The pressure wave includes a frequency. The detector is placed sufficiently near the measurement site to detect a volumetric signal indicative of arterial volume of the patient.
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Citations
17 Claims
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1. A measurement device for determining the blood pressure of a patient by finding a time when transmural pressure is approximately equal to zero, the measurement device comprising:
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a piezo-electric speaker, configured to perturbs at least one of pressure and volume of an artery of a patient; a pressure transducer configured to be placed sufficiently near a measurement site to detect a signal indicative of an oscillation response when the piezo-electric speaker perturbs the at least one of pressure and volume; and a processor coupled to the pressure transducer, wherein the processor is configured to identify a time when transmural pressure is approximately equal to zero. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of determining the blood pressure of a patient by finding a time when transmural pressure is approximately equal to zero, the method comprising:
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perturbing at least one of pressure and volume of an artery of a patient with a piezo-electric speaker; detecting a signal indicative of an oscillation response resulting from said perturbing; filtering the signal; and determining when an amplitude of the filtered signal is lowest, thereby determining when transmural pressure is about zero. - View Dependent Claims (13)
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14. A measurement device for determining the blood pressure of a patient by finding a time when transmural pressure is approximately equal to zero, the measurement device comprising:
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means for perturbing at least one of pressure and volume of an artery of a patient; means for detecting a signal indicative of an oscillation response resulting from said means for perturbing; means for filtering the signal; and means for determining when an amplitude of the filtered signal is lowest, thereby determining when transmural pressure is about zero. - View Dependent Claims (15, 16, 17)
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Specification