What do the korotkoff sounds represent?

Korotkoff sounds are produced underneath the distal half of the blood pressure cuff. The sounds appear when cuff pressures are between systolic and diastolic blood pressure, because the underlying artery is collapsing completely and then reopening with each heartbeat.

What are the 5 phases of korotkoff sounds?

Korotkoff sounds (or K-Sounds) are the “tapping” sounds heard with a stethoscope as the cuff is gradually deflated. Traditionally, these sounds have been classified into five different phases (K-1, K-2, K-3, K-4, K-5) and are shown in the figure below.

What is korotkoff sound and what does it indicate?

Korotkoff sounds are generated when a blood pressure cuff changes the flow of blood through the artery. These sounds are heard through either a stethoscope or a doppler that is placed distal to the blood pressure cuff.

What is the 3rd korotkoff sound?

Blood Pressure Measurement Auscultation over the brachial artery at the elbow allows detection of this point by the first-phase Korotkoff sound, i.e. the point at which sounds from blood flow in the artery first appear. The second phase is a slight muffling and the third a rise in volume of the auscultation sounds.

What phase of the Korotkoff sounds is diastole?

Phase III: The return of sharper sounds, which become crisper to regain, or even exceed, the intensity of Phase I sounds. Phase IV: The distinct abrupt muffling of sounds, which become soft and blowing in quality. Phase V: The point at which all sounds finally disappear completely is the diastolic pressure.

How do I identify Korotkoff sounds?

When the cuff of a sphygmomanometer is placed around the upper arm and inflated to a pressure above the systolic pressure, there will be no sound audible because the pressure in the cuff would be high enough to completely occlude the blood flow. If the pressure is now dropped, the first Korotkoff sound will be heard.

When do you hear the first korotkoff sound?

At the point where the systolic pressure exceeds the cuff pressure, the Korotkoff sounds are first heard and blood passes in turbulent flow through the partially constricted artery. Korotkoff sounds will continue to be heard as the cuff pressure is further lowered.

How do I identify korotkoff sounds?

How do you read blood pressure sounds?

Turn the knob on the pump toward you (counterclockwise) to let the air out slowly. Let the pressure fall 2 millimeters, or lines on the dial, per second while listening for your heart sounds. Note the reading when you first hear a heartbeat. This is your systolic pressure.

What is the second korotkoff sound?

The first Korotkoff sound is the snapping sound first heard at the systolic pressure. The second sounds are the murmurs heard for most of the area between the systolic and diastolic pressures.