ANALYSIS OF RELATED FACTORS OF EXTRACORPOREAL SHOCK WAVE LITHOTRIPSY IN THE TREATMENT OF URINARY CALCULUS

Weimin Guan, JinG Liu

Department of Extracorporeal Shock Wave Lithotripsy, The No. 3 Affiliated Hospital of Qiqihaer Medical University, Qiqihaer City 161000, China

 Objective: To study the influencing factors of extracorporeal shock lithotripsy wave (ESWL) in the treatment of urinary calculus and provide reference for the clinical practice of treating urinary calculus.

Method: In the The No. 3 Affilated Hospital of Qiqihaer Medical University, 800 patients who had had urinary stones from Jan- uary 2017 to February 2018 were randomly selected for follow-up investigation. Disease information and preoperative preparation in- formation for each patient are collated. Images of the patient’s physical condition are recorded and saved. The postoperative follow-up, data, and clinical symptoms or complications were analyzed. All patients were followed up 1 week after surgery and the follow-up was generally continued for 3 months. Successful treatment: calculus is completely discharged or residual stone≤3mm, and hydronephrosis is light. Failure treatment: calculus is not discharged or residual stone>3mm, hydronephrosis is not alleviated or aggravated. Statisti- cal factors were used to analyze the factors affecting the effect of extracorporeal shock wave lithotripsy on urinary calculus.

Result: All patients who underwent treatment were followed up for 3 months and the data were summarized. Based on the therapeutic effect, the patients were divided into a failure group and a success group. The complete discharge of calculus or residual calculus≤3mm belongs to the successful group. The calculus texture is hard, so the broken calculus or the small calculus after the crush is still large, and it is not discharged smoothly. However, in general, a partial calculus diameter > 3 mm is called a treatment failure. The X2 test was used to compare the data of the two groups of patients.

Conclusion: The type of lithotripter, the age of the patient, the location of the calculus, BMI, the degree of hydronephrosis, the approach of the source of the shock, the frequency of the shock wave, and the energy during the lithotripsy are all factors that influence the therapeutic effect of the extracorporeal shock wave.