11/3/2023 0 Comments Korotkoff 1 5See Film Clip 5.3 which focuses on the speed of the needle when deflating the blood pressure cuff. Deflate the cuff slowly and evenly (OER #1) at about 2 mm Hg per second. ![]() Inflate the cuff to the maximum pressure inflation number (OER #1). Place the bell of the cleansed stethoscope over the brachial artery (OER #1) using a light touch and complete seal. Now, you can start to measure blood pressure. Report the presence of an auscultatory gap in narrative notes. When taking blood pressure, if an auscultatory gap is observed, document the first systolic sound and diastolic sound only. If you still cannot feel the pulse, use that value to start auscultating – that value is the maximum inflation pressure number. Inflate the cuff 30 mm Hg quickly past the point when you obliterate the pulse (ie., you no longer feel the pulse). To determine the maximum inflation pressure, start by palpating the brachial or radial pulse while inflating the cuff. It is typically observed in people with a history of hypertension who have been treated with prolonged antihypertensive medication. This gap is an abnormal finding and can occur due to arterial stiffness and arteriosclerotic disease. If you do not determine the maximum pressure inflation, an auscultatory gap could go unrecognized, and as a result the blood pressure could be underestimated (lower than the actual value).Īn auscultatory gap is a silent interval when the Korotkoff sounds go absent and then reappear while you are deflating the cuff during blood pressure measurement. The maximum inflation pressure is the number on the sphygmomanometer that the cuff is inflated to when measuring blood pressure. Healthcare providers determine the maximum inflation pressure before they take blood pressure. Use a stethoscope that has both bell and diaphragm capacity.Make sure that the slope of the stethoscope earpieces point forward or toward your nose.Ensure quiet surroundings so that you can better hear the Korotkoff sounds.Avoid stethoscopes with long tubing because this can distort sounds. Use a high quality stethoscope with durable, thick tubing.The Korotkoff sounds are the result of the turbulent blood caused by the inflated cuff compressing the artery and oscillations of the arterial wall when the heart beats during cuff deflation. The Korotkoff sounds appear after you inflate the cuff (which compresses the artery/blood flow) and then begin to deflate the cuff. You will not hear anything when you first place the stethoscope over the brachial artery, because unobstructed blood flow is silent. ![]() These sounds are heard through a stethoscope applied over the brachial artery when the blood pressure cuff is deflating. ![]() The stethoscope does not make sounds louder it simply blocks out extraneous noises so you can better hear the Korotkoff sounds. The stethoscope is used on bare skin so that a client’s clothing does not affect the sounds.
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