Comparison of long-term outcomes in different managements of diverticular neck in percutaneous nephrolithotomy for diverticular calculi

  • Xiang DAI ,
  • Mei-ni ZUO ,
  • Xiao-peng ZHANG ,
  • Hao HU ,
  • Tao XU
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  • Department of Urology, Peking University People’s Hospital, Beijing 100044, China

Received date: 2021-03-15

  Online published: 2021-08-25

Abstract

Objective: To compare the short-term effects and long-term outcomes of incisional procedure and dilatation procedure to manage diverticular neck in percutaneous nephrolithotomy for diverticular stones. Methods: Clinical data of 61 patients with diverticular stones who underwent percutaneous nephrolithotomy from June 2009 to January 2019 were retrospectively collected and analyzed, which was as follous:(1) basic information: age, gender, body mass index (BMI), American Society of Anesthesiology (ASA) classifications and preoperative symptoms.(2)stone characteristic and procedure-related data: location and size of stone, skinned renal access length and procedure time.(3)perioperative clinical data: hemoglobin drop, Clavien’s classification and stone-free rate. Long-term follow-ups were performed for more than 5 years after the patients were discharged. Results: Fifty-three patients were included based on the inclusion and exclusion criteria, and were divided into the dilation group (n=37) and the incision group (n=16) by the treatment methods of diverticular neck. There were 24 male patients (45.3%) and 29 female patients (54.7%), with a mean age of 39.96±12.88 years. Stones were mainly located in the upper pole (n=32,60.38%) and posterior area (n=41, 77.4%), with a predominance of single stone (n=36, 67.9%). There was no statistically significant difference in demographic data and stone characteristics between the two groups except for age and stone burden. Forty-five patients (84.9%) reached stone-free status after surgeries, and 44 patients (83.0%) postoperative symptoms improved. Twelve patients were lost to the follow-ups, and 41 cases were followed up for an average of 77 months. One recurrence occurred 1 year after surgery. Fifteen patients underwent operations within the past 5 years and the overall 5-year recurrence rate for the remaining 26 patients was 34.6%. There was no statistically significant difference in the incidence of perioperative complications, postoperative stone-free rate and recurrence rate between the two groups, and the recurrence rate was significantly higher 5 years postoperatively than 1 year postoperatively. The proportion of the patients who remained lithotripsy-free and residual stone status decreased significantly. Conclusion: Both incisional and dilatation procedures in percutaneous nephrolithotomy to manage diverticular neck could bring the satisfactory postoperative stone free rate. The recurrence rate was about 30% to 40% 5 years after surgery.

Cite this article

Xiang DAI , Mei-ni ZUO , Xiao-peng ZHANG , Hao HU , Tao XU . Comparison of long-term outcomes in different managements of diverticular neck in percutaneous nephrolithotomy for diverticular calculi[J]. Journal of Peking University(Health Sciences), 2021 , 53(4) : 704 -709 . DOI: 10.19723/j.issn.1671-167X.2021.04.014

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