Lying face-up is known as being in the supine position. Make sure that your patient is lying on a flat surface so that his arms and legs are at heart level. Give the patient at least 10 minutes of rest before taking his blood pressure. Resting will help his blood pressure to normalize, particularly is he is anxious, while also allowing the heart and brachial pulse to level out. Both of your patient’s arms should be exposed. Any sleeves should be rolled up loosely and out of the way. Use your index and middle finger to locate the pulse site. Do not use your thumb because it has its own pulse that could make finding your patient’s pulse more difficult. The brachial pulse is usually felt just above the antecubital fossa--the middle part of the elbow bend. Make sure that the cuff is placed about two inches above the brachial pulse site. To avoid inaccurate readings, make sure that the the cuff is loose enough that it can rotate around the arm slightly, but not so loose that it could slip down the arm. If possible, use a blood pressure cuff that has a width that is approximately two-thirds of the length of the patient’s arm. To take the blood pressure reading,  place the diaphragm (circular piece) of the stethoscope on the brachial pulse. Close the valve of the hand-pump and use it to inflate the cuff to about 20 mmHg above regular blood pressure or until the pulsating sound or your patient’s pulse is no longer audible.  Systolic pressure describes the maximum arterial pressure created by the contraction of the heart’s left ventricle. Diastolic pressure describes the minimum amount of pressure created when the ventricles fill with blood during the beginning of the cardiac cycle. Release the pressure slowly at a rate of 2 to 3 mmHg by opening the valve while closely monitoring the manometer (the pressure gauge).  Take note when the pulsating sound returns, and again when it disappears--the systolic blood pressure is the point where the pulsating sound returns and the diastolic blood pressure is when the pulsating sound disappears. The systolic blood pressure is the value you will use later to calculate the ABI.
اطلب من المريض أن يستلقي ويجعل وجهه لأعلى. حدد مكان الشريان العضدي لف سوار قياس ضغط الدم حول الذراع الأيسر للمريض.  انفخ السوار لإيجاد ضغط الدم الانقباضي للذراع أفرغ السوار من الهواء.