Objective To explore the feasibility of ultrasonography to replace urodynamics as screening in-spection before transurethral resection of prostate (TURP).Method Two hundreds and eighty five patients with be-nign prostatic hyperplasia (BPH)was prospectively collected.All the subjects had preoperative evaluation of lower u-rinary tract symptoms (LUTS),quality of life (QOL),and combined examination of ultrasonography and urodynam-ics.Surgical efficacy was evaluated according to the recovery of international prostate symptom score (IPSS),QOL score,and maximal flow rate (Qmax )at 6 months after TURP.Fisher's linear discriminant analysis was applied to es-tablish the predictively models of surgical efficacy by choosing parameters from ultrasonography or urodynamics as in-dependent factors.Receiver's operating characteristic (ROC)curve was plotted to compare the values between two models.Results The predictive value of sensitivity,specificity,positive and negative of 2 models were both favora-ble.The area under curve (AUC)of 2 models were 0.779 and 0.808 respectively,no significant difference between them (Z =0.648,P =0.51 7).Conclusion Preoperative ultrasound and urine dynamics test has a good predictive effect in TURP curative effect,and ultrasound is expected to replace the urine dynamics as a noninvasive test in screening of BPH surgery patients.%目的：探讨 B 超可否取代尿动力学作为经尿道前列腺电切术（TURP）前筛选检查。方法前瞻性纳入良性前列腺增生（BPH）患者285例。评估患者术前下尿路症状（LUTS）及生活质量（QOL），并给予B 超及尿动力学联合检查。TURP 术后6个月从症状、生活质量及最大尿流率（Qmax ）恢复程度三方面评估手术疗效。利用 B 超及尿动力学参数作为自变量建立 Fisher 判别模型，绘制受试者工作特征（ROC）曲线并对模型预测 TURP 疗效的能力做出比较。结果两个模型均具有良好的敏感度、特异度、阳性以及阴性预测值。两个模型 ROC 曲线下面积（AUC）分别为0．779及0．808，Z 检验提示模型间预测效力差异无统计学意义（Z ＝0．648，P ＝0．517）。结论术前 B 超和尿动力学检查在预测 TURP 疗效方面均具有良好效力，B 超有望取代尿动力学作为筛选 BPH 手术患者的无创性检查。
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