直肠癌新辅助放疗中最佳膀胱容量精确性保持的探讨

To Study the Optimal Accuracy of Bladder Volume in Neoadjuvant Radiotherapy for Rectal Cancer

目的:探讨直肠癌新辅助放疗中最佳膀胱容量的精确性保持。方法:收集2018年8月至2019年12月共60例直肠癌新辅助放疗患者,CT定位前60min患者排空膀胱后饮水800m L,记录定位时的膀胱容量并按此容量分为3组,A组:膀胱容量≤200m L;B组:膀胱容量201~300m L;C组:膀胱容量301~400 m L。患者每次放疗前均按定位时要求饮水充盈膀胱,放疗前进行膀胱容量超声检测,对比3组患者膀胱容量偏离比例。结果:各组膀胱容量可接受情况比较,3组差异有统计学意义(P <0.05),B组符合次数高于A、C组;3组每天检测次数≥2次的膀胱容量次数比较,差异有统计学意义(P <0.05),B组每例平均测量次数低于A、C组;3组患者间的主诉尿量、治疗尿量与定位尿量差异均具有统计学意义(P <0.05)。结论:定位前60min喝水800m L,治疗时达到200~300m L充盈量比较合理,动态下的膀胱容量精确性容易得到保持。

[Objective]To investigate the accuracy of optimal bladder volume in neoadjuvant radiotherapy for rectal cancer.[Method]A total of 60 patients Received neoadjuvant radiotherapy for rectal cancer were collected from August 2018 to December 2019.The patients drank 800mL of water after empting the bladder 60 minutes before CT location,and the bladder volume at location was recorded to divide patients into 3 groups according to this capacity:Group B with bladder volume 201〜300mL,Group C with Bladder volume 301〜400 mL.Before each radiotherapy,the patients were required to fill the bladder with drinking water according to the positioning requirements,and the bladder volume ultrasound test was performed before radiotherapy,and the deviation ratio of the bladder volume was compared among the three groups.[Result]The acceptable bladder volume of each group was compared,and the difference between the three groups was statistically significant(P<0.05).The coincidence frequency of group B was higher than that of group A and C.Comparison of bladder volume with≥2 times of detection per day between the 3 groups showed A statistically significant difference(P<0.05).The average number of measurement per case in group B was lower than that in group A and C.There were statistically significant differences in chief complaint urine volume,treatment urine volume and location urine volume among the three groups(P<0.05).[Conclusion]It is reasonable to drink 800mL water 60 minutes before positioning,and the filling amount can reach 200-300ml during treatment.The accuracy of bladder volume under dynamic condition can be easily maintained.