Abstract：Objective: To measure the liquid flow of flexible ureteroscope under manual syringe infusion mode in vitro and influencing factors. Methods: The experiment was divided into group A and group B according to the lengths of extension tubes. In group A, 1-m extension tube was connected to the flexible ureteroscope. Then physiological saline was extracted with 60 mL syringe and pushed in vitro in the diameter of 0.2 cm, 0.5 cm, and 0.8 cm respectively. The flow rate per min was calculated. In group B, 0.5-m extension tube was connected to the flexible ureteroscope. The rest procedures were same as group A. The data were analysed statistically. Results: In the group A, the liquid flow rate with the diameter of extension tube of 0.8 cm, 0.5 cm and 0.2 cm was (70.59±1.68), (65.45±1.50) and (60.16±1.27) mL/min respectively. In the group B, the liquid flow rate with the diameter of extension tube of 0.8 cm, 0.5 cm and 0.2 cm was (76.59±1.56), (75.00±1.40)and (69.23±1.14) mL/min respectively. When the diameter of extension tube was same, the liquid flow rate of group B was statistically higher than that of group B. When the diameter of extension tube was 1 m, the larger the diameter of extension tube, the larger the liquid flow rate (P<0.001). The liquid flow rate of group B was statistically higher than that of group A. When the diameter of extension tube was 0.5 m, there was no statistically significant difference in the liquid flow rate between the diameter 0.8 cm and 0.5 cm (P=0.093), but the liquid flow rate was obviously higher than that of diameter 0.2 cm. Conclusions: The liquid flow rate of manual syringe infusion mode is not stable during flexible ureteroscope lithotripsy. The length and diameter of the extension tube can influence the liquid flow rate. Otherwise, different people have different power and it is difficult to control. The safety and rationality are doubtful when manual syringe infusion mode is applied to the clinic.
张小红,杨嗣星,廖文彪,柯芹,熊云鹤,刘凌琪,宋超,. 人工推注灌注法输尿管软镜液体流量体外测定及影响因素[J]. 微创泌尿外科杂志, 2015, 4(3): 176-178.
Zhang Xiaohong, Yang Sixing, Liao Wenbiao, Ke Qin,Xiong Yunhe, Liu Lingqi, Song Chao. Measuring the liquid flow of flexible ureteroscope under manual syringe infusion mode in vitro and influencing factors. JOURNAL OF MINIMALLY INVASIVE UROLOGY, 2015, 4(3): 176-178.
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