前列腺内腺动脉血流阻力指数对评估良性前列腺梗阻的意义

Significance of Arterial Resistance Index of Transition Zone in Judgement of Benign Prostatic Obstruction

目的:研究良性前列腺增生(BPH)患者前列腺内腺动脉血流阻力指数(RI)与良性前列腺梗阻(BPO)的相关性,以及RI在判断BPO中的价值。方法:对109例BPH患者通过经直肠超声检测前列腺内腺动脉RI,比较非BPO组与BPO组以及各不同梗阻等级患者RI的变化,并对RI与反映梗阻的尿动力学指标进行相关性分析。结果:BPO组与非BPO组以及各不同梗阻等级之间RI的差异具有显著性,反映BPO的尿动力学指标与RI具有良好的相关性,以梗阻等级与RI的相关性最好(r=0.911)。若以RI≥0.7来判断BPO,其敏感度为94.2%,特异度为95.0%。结论:经直肠超声检测前列腺内腺动脉RI操作简便、无创伤,判断BPO准确性高,无需患者排尿配合,可以作为尿流动力学检查以外诊断BPO的补充方法。

Objective To study the correlation between benign prostatic obstruction（BPO） and the arterial resistance index（RI） of transition zone and to assess the significance of RI in judgement of BPO. Methods RI of 109 patients with benign prostatic hyperplasia was measured by transrectal ultrasound, the differences of RI among different grades of BPO and between the non - BPO group and thc BPO group were studied, and the correlation between RI and the urodynamic parameters reflecting BPO was analyzed. Results There were statistically significant differences in RI among all grades of BPO and between the non - BPO group and the BPO group. The urodynamic parameters reflecting BPO was correlated well with RI（thc grades of BPO in the urodynamic parameters was the best, Spearman＇ s rho = 0. 911 ）. The sensitivity and specificity of judging BPO were 94.2% and 95.0% if the cutoff was RI≥0. 7. Conclusion Measuring RI by transrectal ultrasound is a good predictor for BPO and accurate in diagnosis of BPO, it can be used as a supplement to urodynamics in the evaluation of BPO.