简述良性前列腺增生症患者的膀胱刺激症状。
(1)尿频:早期因前列腺充血刺激引起,随梗阻加重残余尿量增多,膀胱的有效容量减少,尿频症状更为明显。(2)夜尿增多:支配逼尿肌收缩的副交感神经夜间兴奋性增高,加之逼尿肌不稳定,使夜尿次数增多。
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