Computer-Assisted Design Template Guided Percutaneous Radiofrequency Thermocoagulation through Foramen Rotundum for Treatment of Isolated V2 Trigeminal Neuralgia: A Retrospective Case-Control Study

Figure 2

Clinical application of the template. After the process of skin preparation and draping, the template was placed on the patient’s face stably and local anesthesia was given through guide cannula. Then, the needle was punctured to the measured depth through guide cannula. A CT scan was conducted to confirm the correct cannulation before the routine treatment process.