Certified Biomedical Equipment Technician (CBET) 2025 – 400 Free Practice Questions to Pass the Exam

When an Electrosurgical Unit (ESU) does not respond when the cut, coag, or blend functions are activated, the most appropriate initial action involves checking the return electrodes. This is because the return electrode is crucial for completing the electrical circuit necessary for the ESU to function properly. If the return electrode is not making good contact with the patient's skin or if there are issues such as improper placement, dryness, or malfunction, the unit may not operate as intended.

Ensuring that the return electrode is functioning correctly and has a good connection is a critical first step before diagnosing other potential issues, such as internal component failures or power supply problems. Checking the return electrode can often quickly resolve the problem without needing to delve into more complex troubleshooting steps or replacements. This approach is both efficient and effective in a clinical setting.