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The operation of endoscopic biopsy of the external urethral (internal membranous urethrotomy) was first used in England in 1957. Currently the total of 322 patients had this operation for relief of outflow tract obstruction in the neuropathic bladder. In recent years reports of post-operative impotence had appeared in the literature. This is a prospective study of 143 men undergoing division of the external urethral sphincter to determine if there was any effect on sexual function as well as assessing again the long term results of the operation. There has been no case of impotence in this prospective study of 143 patients, nor has it been documented in any of the 322 cases treated from 1956 to 1980. This brief study confirms previous reports on the reliability and simplicity of the operation.

The long term results of transurethral division of the external urethral sphincter in the neuropathic urethra with reference to potency