General ABPM device structure and working principle
Principal device structure
You can explain yourself about principal diagram of ABPM device in the figure.
- air compressor (1);
- processor (2);
- pneumatic system (3) ended with brachial cuff (4);
- sensors (5 or 5 and 6);
- power batteries (7);
- PC (8).
The processor in this apparatus is programmable. We can program it by downloading the schedule obtained by using special [[Category:Software|software] from the PC. When the device is initialized and it is worn by human the processor controls a cuff inflation by compressor according to this schedule. Deflating the cuff is controlled through an automated valve.
In addition, the processor receives, processes and records sensor signals into the memory chip. Depending on the quality of the signal it can also change the schedule.
Sensors record the pressure in the pneumatic system and the physical phenomena caused by the pulsation of the brachial artery during the cuff inflation and deflation.
If the method of blood pressure registration is auscultatory the sensor is located on the inner side of the brachial cuff. The sensor may be situated inside the pneumatic system if this method is, for example, oscillometric.