Analysis The Factors Of Ureteral Stent Encrustation And Stonecomposition Of Ureteral Stents

Objective : The implantation of ureteral stents is a routine operation in urolithiasis surgery,but it also has some side effects,such as lumbago,urinary retention,hematuria,etc.Among them,the scab of ureteral stents has been one of the complications of the implantation of ureteral stents after urolithiasis surgery.Therefore,we discussed the factors influencing the formation of encrustation formation of ureteral stent and compare the similarities and differences between encrustation and original stone components.Methods: The clinical data of 80 patients with urinary calculi in our hospital from March 2020 to August 2021 and their primary calculi and ureteral stents with encrustation were collected.The data of 80 patients with urinary calculi without encrustation on ureteral stent who received treatment during the same period were statistically analyzed.Stones and encrustations were analyzed using the Fourier transform infrared spectroscopy analysis system to compare the differences in composition and explore the reasons.SPSS 20.0 was used to analyze the clinical data of the two groups.Results: There was no significant difference in sex ratio,age,creatinine,glomerular filtration rate,hydronephrosis,preoperative infection control and postoperative oral antibiotic time between experimental group and control group（P > 0.05）.The patients in encrustation group and non encrustation group were more prone to low lumbago and hematuria（P < 0.05）.Compared with the non encrustation group,the patients in the encrustation group had higher incidence of metabolic syndrome,lower stone clearance rate,higher urinary p H,more meat eating and tea drinking（P< 0.05）.71.25%（57/ 80）patients had the same encrustations composition as the original stone component;28.75%（23/80）patients had encrustation and original stone composition inconsistent,which may be related to poor infection control and metabolic diseases.Conclusions: The complication of ureteral stent encrustation reduces the quality of life for patients and increases their economic burden which needs to be paid enough attention.Most of the encrustation are the same as the original stones which means that prevention strategies for various calculi components may also be useful for the prevention of ureteral stents.It can be prevented by changing living habits,controlling extubation time,actively controlling urinary tract infection and treating metabolic diseases.Our results provide a basis for further research on the prevention and treatment of patients with ureteral stent encrustation.