Microlife AG1-30 - Инструкция по эксплуатации - Страница 11

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4.4. Measuring procedure
4.4.1. Connect stethoscope tubing to the chestpiece

After the cuff is properly worn on the arm, connect stethoscope 
tubing of to the chestpiece attached on the cuff. Make sure the 
chestpiece is in contact with skin and above the brachial artery. 
Wear the binaural (earpieces) properly to check the Korotkoff’s 
sound during measurement.
Before using the stethoscope, be sure there is no crack on 
the diaphragm, earpieces, and tubing. Any improper setup or 
damage of the stethoscope will cause distorted sound or poor 
sound transmission to make inaccurate reading.
 

4.4.2. Inflating the cuff

Close the air valve on the bulb by turning the screw clock wise. 
Do not over-tighten. Squeeze the inflation bulb with the hand at 
a steady rate until the pointer on the gauge is 30 mmHg above 
your normal systolic pressure value. If you are not sure the 
value, inflate to 200 mmHg first. 

4.4.3. Systolic blood pressure reading

Slowly open air valve by turning screw counter clockwise and 
hold stethoscope chestpiece over brachial artery. Proper de-
flation rate is essential for an accurate reading, so you should 
practice and master a recommended defla tion rate of 2-3 mmHg 
per second or a drop of 1-2 marks on the pressure gauge each 
heartbeat. You should not keep the cuff inflated any longer than 
necessary. As the cuff begins to deflate, you must listen care-
fully with the stethoscope. Note the reading on the gauge as 
soon as you hear a faint, rhythmic tapping or thumping sounds. 
This is the systolic blood pressure reading. Listen care fully and 
familiarize yourself with pulse (Korotkoff’s) sound.