Problem: When obtaining a patient's blood pressure, how can the examiner protect against an incorrect reading because of the auscultatory gap? When obtaining a patient's blood pressure, how can the examiner protect against an incorrect reading because of the auscultatory gap? Position the patient with the limb used for the blood pressure measurement at heart level. Deflate the cuff at a rate of 2 to 3 mm Hg per sec-ond. Use the popliteal rather than the radial artery. Palpate the systolic pressure prior to taking the blood pressure with a stethoscope. Want Online Help?