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. The stethoscope is used to listen to the blood pressure sounds, which are called Korotkoff sounds. A healthcare provider uses a stethoscope and a blood pressure cuff with a sphygmomanometer to measure blood pressure manually.
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