Rapid non-invasive blood pressure measuring device
First Claim
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1. A measurement device for determining blood pressure, the measurement device comprising:
- an apparatus adapted to provide an oscillating volumetric signal to a volume of a patient'"'"'s artery at a measurement site on the patient, wherein the oscillating volumetric signal comprises a frequency; and
a detector placed sufficiently near the measurement site to detect a pressure signal, wherein the pressure signal comprises an amplitude, and wherein the measurement device is coupled to a processor, which determines when the amplitude of the pressure signal is smallest, thereby determining when transmural pressure is about 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.
98 Citations
20 Claims
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1. A measurement device for determining blood pressure, the measurement device comprising:
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an apparatus adapted to provide an oscillating volumetric signal to a volume of a patient'"'"'s artery at a measurement site on the patient, wherein the oscillating volumetric signal comprises a frequency; and
a detector placed sufficiently near the measurement site to detect a pressure signal, wherein the pressure signal comprises an amplitude, and wherein the measurement device is coupled to a processor, which determines when the amplitude of the pressure signal is smallest, thereby determining when transmural pressure is about 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 from an arterial pressure indicative signal, the method comprising:
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inducing a high-frequency pressure wave onto an artery;
detecting a signal indicative of arterial pressure, wherein the signal includes a high-frequency component from the pressure wave;
filtering low-frequency components from the signal, thereby providing a filtered signal, wherein the filtered signal comprises an amplitude; and
determining when the amplitude of the filtered signal is smallest, thereby determining when transmural pressure is about zero. - View Dependent Claims (13, 14, 15, 16, 17)
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18. 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, which perturbs at least one of pressure and volume of an artery of a patient; and
a pressure transducer placed sufficiently near a measurement site to detect a signal indicative of an oscillation response when the device perturbs the at least one of pressure and volume.
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19. A method of determining the blood pressure of a patient, the method comprising:
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inducing a volumetric perturbation onto an artery, wherein the volumetric perturbation comprises a frequency;
detecting a signal indicative of pressure;
filtering low-frequency components from the signal thereby providing a filtered signal, wherein the filtered signal comprises an amplitude; and
determining when the amplitude of the filtered signal is lowest, thereby determining when transmural pressure is about zero. - View Dependent Claims (20)
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Specification