Method and system for estimation of blood pressure during cuff inflation
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, a first pressure transducer and a second pressure transducer for detecting oscillometric pulses;
inflating the blood pressure cuff;
monitoring for the presence of oscillometric pulses from the first and second pressure transducers during the inflation of the blood pressure cuff;
receiving a first oscillation signal from the first pressure transducer and a second oscillation signal from the second pressure transducer during the inflation of the blood pressure cuff;
filtering the first and second oscillation signals to remove noise and extract the oscillometric pulses;
selecting either the first filtered oscillation signal or the second filtered oscillation signal based upon which filtered oscillation signal includes the least amount of noise;
estimating at least the systolic blood pressure and the diastolic blood pressure for the patient based upon the oscillometric pulses contained in the selected first or second filtered oscillation signal;
terminating the inflation of the blood pressure cuff at a target inflation pressure above the estimated systolic blood pressure;
deflating the blood pressure cuff from the initial inflation pressure;
monitoring for oscillometric pulses from one of the first or second pressure transducers during the deflation of the blood pressure cuff from the target inflation pressure; and
determining at least the systolic pressure, mean arterial pressure and diastolic pressure of the patient based upon the oscillometric pulses detected during the deflation of the blood pressure cuff from the target inflation pressure.
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Abstract
A method of operating a blood pressure measurement system that utilizes a non-invasive blood pressure (NIBP) monitor having a blood pressure cuff. During operation of the NIBP monitor, the blood pressure cuff is initially inflated. During the initial inflation, at least one pressure transducer monitors for the presence of oscillometric pulses and creates an oscillation signal. The oscillation signal is filtered and provided to a central processor. The central processor monitors for oscillometric pulses within the filtered signal and estimates a diastolic pressure and a systolic pressure for the patient. The estimated systolic and diastolic measurements taken during the initial inflation of the blood pressure cuff are used by the central processor to set a target inflation pressure and control the deflation of the blood pressure cuff from the initial inflation pressure.
41 Citations
9 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, a first pressure transducer and a second pressure transducer for detecting oscillometric pulses; inflating the blood pressure cuff; monitoring for the presence of oscillometric pulses from the first and second pressure transducers during the inflation of the blood pressure cuff; receiving a first oscillation signal from the first pressure transducer and a second oscillation signal from the second pressure transducer during the inflation of the blood pressure cuff; filtering the first and second oscillation signals to remove noise and extract the oscillometric pulses; selecting either the first filtered oscillation signal or the second filtered oscillation signal based upon which filtered oscillation signal includes the least amount of noise; estimating at least the systolic blood pressure and the diastolic blood pressure for the patient based upon the oscillometric pulses contained in the selected first or second filtered oscillation signal; terminating the inflation of the blood pressure cuff at a target inflation pressure above the estimated systolic blood pressure; deflating the blood pressure cuff from the initial inflation pressure; monitoring for oscillometric pulses from one of the first or second pressure transducers during the deflation of the blood pressure cuff from the target inflation pressure; and determining at least the systolic pressure, mean arterial pressure and diastolic pressure of the patient based upon the oscillometric pulses detected during the deflation of the blood pressure cuff from the target inflation pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9)
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8. 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, a first pressure transducer and a second pressure transducer each for detecting oscillometric pulses from the patient; inflating the blood pressure cuff; monitoring for the presence of oscillometric pulses from both the first pressure transducer and the second pressure transducer during the inflation of the blood pressure cuff; receiving a first oscillation signal from the first pressure transducer and a second oscillation signal from the second pressure transducer during the inflation of the blood pressure cuff; filtering the first and second oscillation signals to extract the oscillometric pulses; selecting either the first filtered oscillation signal or the second filtered oscillation signal based upon which filtered oscillation signal includes the least amount of noise; estimating at least the systolic blood pressure for the patient based on the oscillometric pulses contained in the selected first or second filtered oscillation signal; and terminating the inflation of the blood pressure cuff at a target inflation pressure above the estimated systolic blood pressure.
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Specification