When testing solid state electrosurgical units, what is the best test load to use?

When testing solid-state electrosurgical units (ESUs), using a test load of 500 ohms is ideal because it closely simulates the resistance seen in actual surgical applications. Solid-state electrosurgical units deliver high-frequency electrical currents, typically in the range of 300 to 4,000 kHz, and 500 ohms serves as a representative load that can adequately reflect the performance of the device during actual use.

This resistance value appropriately balances the need for testing the output characteristics of the device while providing a realistic assessment of how the ESU will perform when used on tissue. Using a load that is too low or too high would not properly mimic the conditions under which an ESU operates, potentially leading to an inaccurate evaluation of its output power and safety features. Consequently, 500 ohms is the most effective choice for ensuring that the electrosurgical unit is functioning correctly within the parameters expected during surgical procedures.