RAPID NON-INVASIVE BLOOD PRESSURE MEASURING DEVICE
First Claim
Patent Images
1. A measurement device for determining blood pressure, the measurement device comprising:
- an exciter, configured to perturb at least one of volume and pressure of a patient'"'"'s artery with an oscillating perturbation signal, the oscillating perturbation signal oscillating at an exciter frequency;
a detector configured to detect a signal indicative of an oscillation response to the oscillating perturbation signal;
a band-pass filter set at a multiple of the exciter frequency and configured to provide a filtered signal output in response to the detected signal; and
a processor, coupled to the band-pass filter, 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
20 Claims
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1. A measurement device for determining blood pressure, the measurement device comprising:
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an exciter, configured to perturb at least one of volume and pressure of a patient'"'"'s artery with an oscillating perturbation signal, the oscillating perturbation signal oscillating at an exciter frequency; a detector configured to detect a signal indicative of an oscillation response to the oscillating perturbation signal; a band-pass filter set at a multiple of the exciter frequency and configured to provide a filtered signal output in response to the detected signal; and a processor, coupled to the band-pass filter, 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)
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11. A measurement device for determining blood pressure, the measurement device comprising:
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an exciter, configured to perturb at least one of volume and pressure of a patient'"'"'s artery with an oscillating perturbation signal, the oscillating perturbation signal oscillating at an exciter frequency; a detector configured to detect a signal indicative of an oscillation response to the oscillating perturbation signal; a band-pass filter having one or more center frequencies approximately equal to multiples of the exciter frequency, the band-pass filter configured to provide a filtered signal output in response to the detected signal; and a processor, coupled to the band-pass filter, wherein the processor is configured to identify a time when transmural pressure is approximately equal to zero. - View Dependent Claims (12, 13, 14, 15)
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16. A measurement device for determining blood pressure, the measurement device comprising:
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an exciter, configured to perturb at least one of volume and pressure of a patient'"'"'s artery by providing an oscillating perturbation signal to the patient'"'"'s artery, the oscillating signal oscillating at an exciter frequency; a detector configured to detect a signal indicative of an oscillation response to the oscillating perturbation signal; a processor, configured to identify a time when transmural pressure is approximately equal to zero by analyzing harmonics of the exciter frequency present in the signal detected by the detector. - View Dependent Claims (17, 18, 19, 20)
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Specification