Q1: Define the first and second sounds of Korotkoff. Which sound is used to appr

Question

Q1: Define the first and second sounds of Korotkoff. Which sound is used to approximate systolic pressure and which sound is used to approximate diastolic pressure?

Q2. Note the difference in systolic pressure value between when (a) the sound actually began, (b) was detected by the stethoscope transducer, and (c) was recorded, and the time when the observer first heard the sound and pressed the event marker keystroke. (Example: 141 mmHg – 135 mmHg = 6 mmHg.) What factors could account for this

Q3. Do both systolic and/or diastolic pressure change as your heart rate increases?

Q4. How does this change affect your pulse pressure?

Explanation / Answer

1. The faint, repetitive, clear tapping sounds which gradually increase in intensity for at least two consecutive beats is first korotkoff sound and is recorded as systolic blood pressure. A brief period which follow during which the sounds soften and acquire a swishing quality is second korotkoff sound. The cuff pressure at which sound becomes muffled ( fourth korotkoff) and sound disappear (fifth korotkoff) is diastolic blood pressure.

2. The microphone data is faster and accurate and the recorded data is less accurate because of a communication lag.

3. Yes both systolic and diastolic blood pressure increases as heart rate increase and systolic increases more.

4. Pulse pressure increases only slightly because systolic pressure increases more compared to diastolic pressure.

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