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[Residual fraction in the evaluation of bladder outlet obstruction resulting from benign prostatic hyperplasia]
Wen Cheng1, Jian-Ping Gao, Zheng-Yu Zhang
1Department of Urology, Nanjing General Hospital, Nanjing Command, Nanjing, Jiangsu 210002, China.
Objectives:
To study residual fraction (RF) in the bladder outlet obstruction (BOO) resulting from benign prostatic hyperplasia (BPH).
Methods:
Fifty adult outpatients with BPH were evaluated. With ultrasound and uroflowmetry, prevoid volume (PV) and postvoid residual volume (PRV) and peak flow rate (Qmax) were determined. Linear dependence analysis of RF and Qmax, PRV and Qmax were conducted.
Results:
The coefficient between RF and Qmax showed extremely negative correlation(r = -0.3859, P < 0.01). Also, PRV and Qmax showed significant negative correlation (r = -0.2831, P < 0.05).
Conclusions:
The greater the RF, the more serious the BOO, the poorer potency of bladder. It is recommended that RF be used as a good supplement to PVR in the routine non-invasive evaluation of BOO caused by BPH.
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