Esketamine Combined Pulsed Radiofrequency for Acute/Subacute Zoster-associated Trigeminal Neuralgia

Patients in the esketamine group will receive intravenous infusion of esketamine besides PRF+standardized treatment.The formula will be intravenous infusion of 0.5mg/kg of esketamine diluted in 50 mL normal saline, starting with intravenous injection of 10 mg of esketamine for 1 minute, and maintaining a dose 8 mg/h.The infusion rate will be adjusted the parameter according to the tolerance of the patients

Patients in the control group will receive PRF+standardized treatment