Method and system utilizing SpO2 plethysmograph signal to reduce NIBP determination time
First Claim
1. A method of monitoring blood pressure in a patient, the method comprising the steps of:
- providing a non-invasive blood pressure (NIBP) monitor having a selectively inflatable and deflatable blood pressure cuff and at least one pressure transducer for detecting oscillation pulses from the patient;
acquiring a waveform of the patient, the waveform having a series of time-spaced pulses each representing a patient heartbeat;
analyzing the waveform to determine a timing period and a deflation period based upon the waveform;
inflating the pressure cuff to a first pressure level;
detecting the beginning of one of the oscillation pulses from the pressure transducer;
determining the amplitude of the oscillation pulse at the first pressure level during the timing period following the beginning of the oscillation pulse; and
deflating the blood pressure cuff during the deflation period to a second pressure level, wherein the deflation period follows the timing period.
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Abstract
A method and system for operating a non-invasive blood pressure monitor that utilizes an SpO2 plethysmographic signal to reduce the time required to obtain an estimation of a patient'"'"'s blood pressure. During operation of the NIBP monitor, the NIBP monitor utilizes the SpO2 plethysmographic signal to determine a timing period and a deflation period for each pulse associated with the patient'"'"'s heartbeat. Upon receiving an oscillation pulse, the NIBP monitor determines the oscillation amplitude during the timing period and deflates the blood pressure cuff during the deflation period immediately following the timing period. Preferably, the deflation period occurs during the same oscillation pulse used to calculate the oscillation pulse amplitude to decrease the amount of time required to obtain a blood pressure estimate from the patient.
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Citations
18 Claims
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1. A method of monitoring blood pressure in a patient, the method comprising the steps of:
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providing a non-invasive blood pressure (NIBP) monitor having a selectively inflatable and deflatable blood pressure cuff and at least one pressure transducer for detecting oscillation pulses from the patient; acquiring a waveform of the patient, the waveform having a series of time-spaced pulses each representing a patient heartbeat; analyzing the waveform to determine a timing period and a deflation period based upon the waveform; inflating the pressure cuff to a first pressure level; detecting the beginning of one of the oscillation pulses from the pressure transducer; determining the amplitude of the oscillation pulse at the first pressure level during the timing period following the beginning of the oscillation pulse; and deflating the blood pressure cuff during the deflation period to a second pressure level, wherein the deflation period follows the timing period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of monitoring the blood pressure of a patient, the method comprising the steps of:
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providing a non-invasive blood pressure (NIBP) monitor having a selectively inflatable and deflatable blood pressure cuff and at least one pressure transducer for detecting oscillation pulses from the patient; acquiring a plethysmographic waveform of the patient, the plethysmographic waveform having a series of time-spaced plethysmographic pulses each representing a patient heartbeat; analyzing the plethysmographic waveform to determine a timing period; inflating the blood pressure cuff to an initial inflation pressure; detecting the beginning of an oscillation pulse from the pressure transducer at a first pressure level of the blood pressure cuff; determining the amplitude of the oscillation pulse during the timing period immediately following the beginning of the oscillation pulse; deflating the blood pressure cuff for a deflation period after the timing period to a second pressure level, wherein the deflation occurs during the oscillation pulse; and storing the amplitude of the oscillation pulse in a processor of the NIBP monitor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A system for determining the blood pressure of a patient, comprising:
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a non-invasive blood pressure (NIBP) monitor including a central processor and a display; a blood pressure cuff positionable on the patient, the blood pressure cuff being selectively inflatable and deflatable by the NIBP monitor; a pressure transducer associated with the blood pressure cuff and coupled to the central processor, the pressure transducer being operable to detect oscillation pulses from the patient; and a sensing system configured to provide a plethysmographic waveform having a series of time-spaced plethysmographic pulses each representing a patient heartbeat; wherein the central processor controls the deflation of the pressure cuff from an initial inflation pressure in a series of pressure steps each defined by a deflation period determined from the plethysmographic pulses of the plethysmographic waveform. - View Dependent Claims (18)
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Specification