If the voltage is 500 uV and the sensitivity is 150 uV, what would the pen deflection be?

To determine the pen deflection in a polysomnography recording, you can use the relationship between voltage, sensitivity, and deflection. The formula for calculating deflection is given by:

Pen Deflection (mm) = Voltage (uV) / Sensitivity (uV/mm)

In this scenario, the voltage is 500 uV and the sensitivity is 150 uV/mm.

By applying the formula:

Pen Deflection = 500 uV / 150 uV/mm = 3.33 mm

This calculation demonstrates that for a voltage of 500 uV, the pen will deflect 3.33 mm on the chart, based on the sensitivity setting of 150 uV per mm. Thus, the answer is appropriately determined to be 3.33 mm.