It is necessary to return the knocks.
This is me about Korotkov's tones in the phonendoscope when measuring blood pressure with a mechanical tonometer. We have already discussed with you several times disappearing knocks or endless knocks. Sometimes they are not heard at all. Maybe, of course, there is something wrong with our hearing. But more often the case is in excess venous blood.
When the cuff of the tonometer hugs the arm more than we would like, then some of the veins are squeezed, and the arm swells slightly from venous blood. This makes it difficult to hear Korotkov's tones.
We need to get rid of excess venous blood.
Calm! Only calmness! It won't hurt.
You need to raise your hand with the tonometer cuff above your head, squeeze and unclench your fingers 5-10 times, then put your hand on the table, quickly inflate the cuff and quickly measure the pressure. Usually knocks come back.
There used to be a method when, while still on a raised arm, the cuff of the tonometer was pumped 50 millimeters of mercury higher than the estimated upper pressure, and then they lowered the arm and listened to knocks.
These tricks are especially good at emphasizing lower pressure.
It seems to me that pumping up pressure in a raised arm is not very convenient. A heavy pressure gauge will surely fly over someone's head. So it will be enough just to work with a raised hand.
Have you tried this?
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