BLOOD PRESSURE MONITOR AND METHOD

摘要

A method is provided for noninvasive, continuous, real-time monitoring of a patient's arterial blood pressure using Doppler probes and a blood pressure cuff for measurement of a patient's systolic and diastolic blood pressures at a major distal artery. A continuous Doppler blood flow velocity measurement is used to generate a waveform signal correlating to a cuff's measurements of systolic and diastolic pressures. In addition, a method determines cerebral blood perfusion by providing at least two Doppler probes, one of which is placed at a distal artery with a blood pressure cuff and another of which is placed over the carotid artery or the middle cerebral artery. An algorithm calculates systolic and diastolic pressures at the distal artery and at the carotid artery or the middle cerebral artery as a function of the continuously measured Doppler blood flow velocities.

主权项

1. A method for noninvasive, continuous, real time monitoring of arterial blood pressure of a patient, comprising:
a) providing a blood pressure cuff and placing the cuff around a limb of the patient; b) providing a Doppler ultrasound probe, positioning the probe over a distal artery below the cuff, and continuously measuring Doppler blood flow velocities with the probe; c) inputting the Doppler blood flow velocities into a processor, wherein the processor generates a waveform signal of the Doppler blood flow velocities; d) inflating the cuff and measuring diastolic blood pressure at a cuff pressure at which a sustained change in Doppler blood flow velocity occurs; e) inflating the cuff further and measuring systolic blood pressure at a cuff pressure at which Doppler blood flow velocity is zero; f) deflating the cuff; g) correlating the Doppler waveform signal peak of maximum blood flow velocity to the systolic blood pressure and the Doppler waveform signal trough of end diastolic minimum velocity to the diastolic blood pressure; and h) generating calculated systolic and diastolic pressures with an algorithm as a function of the continuously measured Doppler blood flow velocities.