預測體外震波碎石成功率的因子
陳柏誠、陳建志、陳建華、柯智群、王炯珵
恩主公醫院泌尿科
Factors to predict the outcome of extracorporeal shock wave lithotripsy
Po-Cheng Chen, Chien-Chih Chen, Chien-Hua Chen, Chih-Chun Ke , Chung-Cheng Wang
Urology Department,En Chu Kong Hospital
Purpose
We investigated the patients who underwent ESWL to find out which factors influenced the outcome and built a logistic regression model to estimate the probability of stone free after ESWL.
Material and methods
From January 2013 to December 2013, we retrospectively reviewed the clinical status of 641 patients with solitary urinary calculus who underwent ESWL in our hospital. These patients were divided to the renal stone group and the ureteral stone group. We analyzed the pre-ESWL characteristics of these patients.
Results
The stone-free rate was 54.8% in all patients. The stone-free rates were 46.7% and 67.8% in renal stone group and ureteral stone group, respectively. In the multivariate logistic regression for the renal stone group, BMI, stone length and stone width are the independent factors which affect the success rate. In the multivariate logistic regression for the ureteral stone, only stone length is the independent factor. A logistic regression model was designed to estimate SFR, which has a sensitivity of 77.8% and specificity of 75.5%.
Conclusion
BMI, stone length, stone width, and kidney or ureteral stone are all prognostic factors influencing the outcome of ESWL. Logistic regression model to predict SFR can help us evaluate whether the patient has favorable outcome after ESWL or not.