Conclusions NO modulates the relaxation of bladder neck and is related to the symptom of BOO in BPH patients.The role of NO in the bladder detrusor is not yet clear.

• 结论NO参与调节膀胱颈部肌肉的松弛，NO活性的降低可能是临床上BPH出现膀胱出口梗阻症状的原因之一，但NO在膀胱逼尿肌中的作用尚不明确。