移行区指数作为良性前列腺增生的预测指标

目的：探讨经直肠超声(TRUS)测量的前列腺移行区与国际前列腺症状评分(IPSS)、最大尿流率(Qmax)及残余尿量(PVR)之间的关系，以及移行区指数(TZI)在评估良性前列腺增生(BPH)中的价值。方法：286例BPH患者进行IPSS评分、Qmax及PVR测量，TRUS测量前列腺体积(TPV)及移行区体积(TZV)，计算移行区指数(TZI=TZV／TPV)。结果：TPV与IPSS(r=0．092，P＞0．05)、Qmax(r=-0．125，P＞0．05)、PVR(r=0．426，P＞0．001)之间均无显著相关性;TZV与IPSS(r=0．385，P＜0．01)、Qmax(r＝-0．412，P＜0．001)、PVR(r=0．426，P＜0．001)之间有显著相关性。TZI与IPSS(r=0．436，P＜0．001)、Qmax(r=-0．534，P＜0．001)、PVR(r=0．528，P＜0．001)之间有显著相关性。TZI＞0．50的患者与TZI＜0．50的患者相比，IRSS、Qmax及PVR差异有显著性(P＜0．01)。结论：移行区指数与BPH的症状相关，且可有效评估梗阻的严重程度。

Transition Zone Index as a Method of Assessing Benign Prostatic Hyperplasia

Objective:To evaluate the relation among the transition zone of prostate measured by transrectal ultrasound with international prostate symptom score(IPSS), peak urine flow rate(Qmax) and postvoid residual urine volume(PVR), and the volume of transition zone index in evaluating clinical benign prostatic hyperplasia(BPH). Methods: IPSS, Qraax, PVR, transrectal ultrasound volume of the total prostate and the transition zone were prospectively evaluated in 286 cases with symptomatic BPH, and the transition zone index was calculated. Results:There was no significant correlation among total prostate volume and IPSS( r = 0. 092, P > 0. 05), Qmax (r= -0. 125, P> 0. 05), PVR(r = 0.078, P> 0.05), but a stonger correlation among TZV and IPSS (r = 0. 385, P <0.01), Qmax( r= -0.412, P < 0. 001), PVR( r = 0. 426, P < 0. 001), and a signicant correlation among TZI and IPSS( r = 0. 436, P < 0.001), Qmax (r= -0.534, P <0.001), PVR(r = 0.528, P <0.001) . There was a significant difference ( P < 0. 01)in IPSS, Qmax and PVR between patients with TZI > 0. 50 and those with TZI < 0. 50. Conclusion: Transition zone index is a parameter that correlates significantly with the symptom of BPH and available in evaluating the severity of obstrution.