korotkoff sounds การใช้

• The time average of the first Korotkoff sound represents a reliable pressure marker of systole of the heart.
• The time average of the fourth Korotkoff sound represents a reliable pressure marker of diastole of the heart.
• The cuff pressure is further released until no sound can be heard ( fifth Korotkoff sound ), at the diastolic arterial pressure.
• With Recklinghausen's oscillotonometer, a stethoscope was not needed to listen for Korotkoff sounds, they were instead represented as oscillations of a needle.
• If the pressure is dropped to a level equal to that of the patient's systolic blood pressure, the first Korotkoff sound will be heard.
• As the pressure in the cuffs falls, a " whooshing " or pounding sound is heard ( see Korotkoff sounds ) when blood flow first starts again in the artery.
• Subsequent improvements to the device included the use of a wider cuff ( the original was only 5 cm wide ) and the use of Korotkoff sounds to determine systolic and diastolic blood pressure.
• Between 1912 and 1925 he published articles analyzing the contractile properties of isolated blood vessels, the mechanism of the Korotkoff sounds, the effect of peripheral resistance on blood pressure, and blood pressure measurements in normal and pathological conditions.
• In research, the values obtained by an experienced knowledgeable physician using a mercury manometer and stethoscope listening for the Korotkoff sounds are typically within 10 mmHg of the pressures measured via higher sophistication internal measurements of central aortic pressures at heart level.
• Nevertheless, it is sufficiently accurate for many diagnostic and therapeutic studies " . " From this article : " " Compared with direct intra-arterial measurement of blood pressure, the auscultatory technique using Korotkoff sounds tends to give systolic values that are slightly lower and diastolic values that are slightly higher than intra-arterial measurements . " " [ Talk ] 21 : 24, 18 August 2009 ( UTC)