Systems, devices, and methods for measuring blood pressure of a user

A device for determining a blood pressure of a user having a wrist, skin defining an outer surface of the wrist and an artery;

• the device comprising:
• an elongate band with a length configured to extend around the wrist of the user so as to support a skin interface surface of the device in engagement with the skin of the wrist;
• pressure actuators coupling the elongate band to the skin interface surface, the pressure actuators configured to apply a variable pressure between the skin interface surface and the skin of the wrist at an array of regions distributed along the skin interface surface, the pressure actuators comprising a first pressure actuator and a second pressure actuator;
• pressure sensors distributed over a sensor surface extending along the skin interface surface, the pressure sensors comprising a first pressure sensor and a second pressure sensor, the first pressure sensor being configured to sense a pressure of a first region of the array of regions, the second pressure sensor being configured to sense a pressure of a second region of the array of regions, wherein each of the pressure sensors is operatively coupled with only one of the pressure actuators;
• a signal processing system coupled with the pressure sensors and the pressure actuators such that, in use, the first pressure actuator and the second pressure actuator selectively and sequentially urge the first region and the second region, respectively, against the wrist;
• wherein the first pressure sensor generates a first pressure signal while the first region is urged against the wrist by the first pressure actuator and the second pressure sensor generates a second pressure signal while the second region is urged against the wrist by the second pressure actuator, the first region being disposed at a first location of the band, the second region being disposed at a second location of the band, the first location being spaced apart from the second location along the length of the band, the signal processing system being configured to:
• select one of the first pressure sensor and the second pressure sensor by comparing the first pressure signal with the second pressure signal;
• identify a preferred pressure actuator of the first pressure actuator and the second pressure actuator, wherein the preferred pressure actuator is identified to be the first pressure actuator when the selected one of the first pressure sensor and the second pressure sensor is the first sensor, and wherein the preferred pressure actuator is identified to be the second pressure actuator when the selected one of the first pressure sensor and the second pressure sensor is the second pressure sensor;
• and
• measure the blood pressure of the user via applanation by using the preferred pressure actuator and the selected one of the first pressure sensor and the second pressure sensor;
• and
• output the measured blood pressure.