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“When the arm is either in the lap or at the side, the blood vessels in the arm are at a greater vertical distance from the heart. Gravity increases the pressure in these blood vessels.
For example, if a person’s actual blood pressure is 134, and blood pressure is measured on a dangling arm, the reading could end up over 140, which is considered to be stage 2 hypertension.
Remove the clothing over the arm that will be used to measure blood pressure. You can use either arm. Usually there is not a big difference between readings on them. Be still.
A minimum systolic value can be roughly estimated by palpation, most often used in emergency situations, but should be used with caution. [10] It has been estimated that, using 50% percentiles, carotid, femoral and radial pulses are present in patients with a systolic blood pressure > 70 mmHg, carotid and femoral pulses alone in patients with systolic blood pressure of > 50 mmHg, and only a ...
Segmental blood pressure is used to measure actual limb blood pressure, to assess and locate arterial occlusion. On the legs, pressure is measured at the ankle, below the knee, above the knee, and mid-thigh. On the arm, measurements are taken at the wrist, below the elbow, above the elbow, and mid-upper arm. [1]
If the pressure is dropped to a level equal to that of the patient's systolic blood pressure, the first Korotkoff sound will be heard. As the pressure in the cuff is the same as the pressure produced by the heart, some blood will be able to pass through the upper arm when the pressure in the artery rises during systole.