Measurement of the systolic blood pressure begins when:
A. The cuff is deflated
B. The first sound is heard
C. The sound muffles
D. The sound disappears
B
B. Note point on manometer when first clear sound is heard. The sound will slowly increase in intensity. First Korotkoff sound reflects systolic blood pressure.
A. Slowly release pressure bulb valve, and allow manometer needle to fall at rate of 2 to 3 mm Hg/sec.
C. Place stethoscope earpieces in ears and be sure sounds are clear, not muffled. Earpieces should follow angle of ear canal to facilitate hearing.
D. Continue to deflate cuff gradually, noting point at which sound disappears in adults. Note pressure to nearest 2 mm Hg. Listen for 10 to 20 mm Hg after the last sound. Beginning of the fifth Korotkoff sound is recommended as indication of diastolic pressure in adults.
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