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You should never take a manual pulse with your thumb because of the chance of picking up your own pulse from the blood vessels in your thumb.
the thumb's tip is in a awkward position than the other fingertips.
Your thumb also has a pulse so you could be counting your own pulse beats per minute.
The thumb has a pulse.
Your thumb has its own pulse so it shouldn't be used to take your pulse.
the thumb, because it has its own pulse so cannot be used.
the thumb is never used because the thumb also has its own beat, so you could potentially be counting your own beat instead of the other persons. Also if you take your own pulse by your own thumb, you may be overlapping the counting of the beat
The pulse site located on the inner aspect of the wrist is the radial pulse. It can be felt by placing the fingers on the thumb side of the wrist, just below the base of the thumb. This site is commonly used to assess heart rate and rhythm.
The thumb should not be used for measuring another person's heart rate, as its strong pulse may interfere with discriminating the site of pulsation
radial
radial pulse
Radial artery (lateral or thumb side of lower arm).