Ambulatory Blood Pressure and Vital Sign Monitoring Apparatus, System and Method

A system for determining a physiological parameter of a subject human being for monitoring, the subject having a left side and a right side, the system comprising:

• a plurality of wearable apparatuses, a first wearable apparatus adapted to be worn on the left side, a second wearable apparatus adapted to be worn on the right side, each wearable apparatus of the plurality of wearable apparatuses comprising:
• a signal generator to generate either a left signal or a right signal to corresponding left and right positions on the subject;
• a sensor to receive a left or right analog sensor electrical signal from corresponding left and right positions on the subject;
• an analog-to-digital converter coupled to the sensor to sample and convert the left and right analog sensor electrical signals into a plurality of digital amplitude values representing amplitudes of left and right arterial pressure waves;
• and
• a wireless transmitter coupled to the analog-to-digital converter, the wireless transmitter to transmit the plurality of digital amplitude values;
• and
• a central vital signs monitor, comprising:
• a memory circuit to store calibration data for the subject;
• a wireless transceiver to receive the transmitted plurality of digital amplitude values;
• and
• a processor coupled to the wireless transceiver and to the memory, the processor adapted to determine corresponding features of the left and right arterial pressure waves;
• measure a differential pulse arrival time of the left and right arterial pressure waves using the corresponding determined features;
• and using the measured differential pulse arrival time and the calibration data, to determine at least one physiological parameter selected from the group consisting of:
• blood pressure, heart rate, stroke rate, and cardiac output.

An apparatus for determining a physiological parameter of a subject human being for monitoring, the subject having a left side and a right side, the apparatus utilized in conjunction with a computing device, the apparatus comprising:

• a housing having a first, left finger placement location and a second, right finger placement location;
• a first signal generator arranged within the housing at the first finger placement location to generate a left signal to a left finger of the subject;
• a second signal generator arranged within the housing at the second finger placement location to generate a right signal to a right finger of the subject;
• a first sensor arranged within the housing at the first finger placement location to receive a left analog sensor electrical signal from the left finger of the subject;
• a second sensor arranged within the housing at the second finger placement location to receive a right analog sensor electrical signal from a right finger of the subject;
• a first analog-to-digital converter arranged within the housing and coupled to the first sensor to sample and convert the left analog sensor electrical signals into a first plurality of digital amplitude values representing amplitudes of a left arterial pressure wave;
• a second analog-to-digital converter arranged within the housing and coupled to the second sensor to sample and convert the right analog sensor electrical signals into a second plurality of digital amplitude values representing amplitudes of a right arterial pressure wave;
• and
• a wireless transmitter coupled to the first and second analog-to-digital converters to transmit the first and second pluralities of digital amplitude values to the computing device.