2012-08-31

Week 4


Title:           

Portable Digital Blood Pressure Monitor

Synopsis:   

Blood pressure is one of the most commonly measured physiological parameters for cardiovascular diagnosis. Current methods to measure blood pressure include the use of a non-invasive cuff and the use of an invasive arterial catheter. Auscultatory cuff measurements require training to discern the various Korotkoff sounds while oscillometric cuff measurements are cumbersome in an emergency, time crucial setting. The use of a catheter can lead to infection/embolism. A portable blood pressure monitor device can measure a user's blood pressures and heart rate through an inflatable hand cuff. The device is consisted of three main parts: external hardware (such as cuff, motor, valve, and LCD), analog circuit, and microcontroller. The analog circuit converts the pressure value inside the cuff into readable and usable analog waveforms. The MCU samples the waveforms and performs Analog to Digital conversion so that further calculations can be made. In addition, the MCU also controls the operation of the devices such as the button and LCD display.


Block Diagram

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