What is the usual cuff pressure used in arterial volume recording?

The usual cuff pressure used in arterial volume recording is typically set at 65 mmHg. This specific pressure is chosen because it is generally above the diastolic pressure, enabling effective compression of the blood vessels without exceeding either systolic pressure or causing excessive discomfort. This level is sufficient to occlude arterial flow, allowing for accurate measurement of the volume changes within the arterial system during the cardiac cycle.

Using a cuff pressure that is too low may result in partial occlusion, leading to inaccurate readings, while a pressure that is too high could close off blood flow entirely, causing difficulties in measuring or interpreting the arterial volume effectively. Hence, 65 mmHg serves as a practical balance between these extremes, ensuring reliable data is collected for analysis.