Objective To study focus dose rate of gamma knife for primary trigeminal neuralgia. Methods The clinical data of 112 patients with primary trigeminal neuralgia were analyzed retrospectively. All the patients were treated with gamma knife and obtained effective follow-up. According to the median focus dose rate(2.38 Gy/min), the patients were divided into high focus dose rate group and low focus dose rate group. The response rate, recurrence rate, onset time and complication rate were compared between the tw...