Answer :
The thumb shouldn't be used to check the pulse as we could accidentally measure our own pulse. The thumb generates an arterial pulse which could be mistaken as the patient's pulse.
The pulse is the rate at which a heart beats. The normal pulse for a person is 60 to 100 beats per minute. Pulse can be easily checked on the inside of the left-hand wrist using the two fingers of the right hand. The thumb cannot be used to count the pulse because it generates an arterial pulse of its own.
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