What is one necessary equipment needed for a DRG trial?

In a DRG (Dorsal Root Ganglion) trial, a patient controller is essential because it allows for the management and control of pain relief during the trial. This device is used by patients to adjust their pain medication, ensuring they have the ability to regulate their comfort levels in real-time. The interactivity provided by a patient controller is crucial, as it empowers patients to communicate their pain levels effectively and make adjustments as necessary, which is vital for evaluating the efficacy of the trial.

The other equipment listed, while potentially useful in a medical context, do not specifically address the needs and procedures of a DRG trial. A standard thermometer, surgical scalpel, and regular intravenous drip play roles in different medical settings or procedures but do not facilitate the patient-driven aspect that is critical in a DRG trial for monitoring and managing pain control.