根据前列腺体积估算选择性绿激光前列腺汽化术中能量消耗的可行性研究

目的 探讨根据前列腺体积估算选择性绿激光前列腺汽化术(PVP)术中能量消耗的可行性.方法 2005年1月至2007年1月采用PVP治疗260例良性前列腺增生(BPH)患者.用经直肠超声(TRUS)测量每例患者的术前前列腺体积和术后2周前列腺体积,术中记录绿激光能量消耗及激光发射时间.计算出汽化1 g前列腺组织需要消耗的绿激光能量.用相关回归分析,评价绿激光能量消耗与术前前列腺体积的相关性,并建立回归方程.结果 汽化1 g前列腺组织需要消耗绿激光能量(6.9±0.6)kJ.绿激光能量消耗与术前前列腺体积呈正直线相关,其回归方程为:绿激光能量消耗(kJ)=4.7×术前前列腺体积(cm3)-14.1.结论 根据前列腺体积估算PVP术中能量消耗具有可行性.

The feasibility study of estimating energy consumption in photoselective vaporization of prostate based on the volume of prostate

Objective To discuss the feasibility of estimating energy consumption of green laser in photoselective vaporization of prostate (PVP) based on the preoperative volume of prostate. Methods From January 2005 to January 2007,260 patients with benign prostatic hyperplasia (BPH) had been treated with PVP. Preoperative prostatic volume and post-two-weeks-operative prostatic volume of each patient were measured by transrectal ultrasound (TRUS). Energy consumption and emission time of green laser were recorded during the operation. Then we calculated the amount of energy consumption needed in vaporizing one gramme prostatic tissue, evaluated the correlation of energy consumption and preoperative volume of prostate by means of correlation-regression analysis, and established its regression equation. Results The amount of energy consumption needed in vaporizing one gramme prostatic tissue was (6. 9 ± 0. 6) kj. The correlation of energy consumption and preoperative volume of prostate was significantly positive linear correlated. Its regression equation was: Energy Consumption (kJ) = 4. 7 × Preoperative Volume of Prostate (cm3) -14. 1. Conclusion It is feasible to estimate energy consumption of green laser in PVP based on preoperative volume of prostate.