Katz J
S Afr Med J. 1980 Oct 25;58(17):691-2.
Cryosurgery was found valuable for the treatment of haemorrhoids in 26 patients aged over 60 years. The results are even better than in younger patients. In most cases local anaesthesia for the procedure is preferred to general anaesthesia.
冷冻手术被发现对治疗26名60岁以上患者的痔疮很有价值。其效果甚至比年轻患者更好。在大多数情况下，该手术首选局部麻醉而非全身麻醉。
