Patent ID: 7153269
Filing Date: 2006-12-26
Classification: A61B

Abstract:
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.