Introduction: The aim of the study was to investigate the effect of the diameter of the ureteral access sheath (UAS) used during RIRS on kidney injury based on acute kidney injury (AKI) biomarkers. Methods: This prospectively randomized controlled study included a total of 125 patients divided into three groups: group 1 (n = 52) in which a 12/14 Fr UAS was used, group 2 (n = 52) in which a 9.5/11.5 Fr UAS was used, and group 3 (n = 21) that was designed as the control group with no urogenital disease history. Urine samples were collected preoperatively and at the postoperative second and 24th hours after surgery and analyzed for AKI using the urinary kidney injury molecule-1 (uKIM-1), N-acetyl-ß-D-glucosaminidase, and neutrophil gelatinase-associated lipocain biomarkers. Results: In group 1, there was no statistical change in any of the three AKI biomarkers at the postoperative second or 24th hour compared to the preoperative period. In group 2, the values of all three AKI biomarkers were statistically significantly increased at the postoperative second and 24th hours compared to the preoperative period while no statistical difference was observed between the two postoperative evaluation times. At the postoperative second hour, the uKIM-1 value was statistically significantly higher in group 2 compared to group 1 (p = 0.043). Conclusions: The results of our study showed that AKI was not observed in RIRS performed with a 12/14 Fr UAS while the use of a 9.5/11.5 Fr UAS resulted in AKI according to the assessment of the related biomarkers.

1.
Skolarikos A, Neisius A, Petrik A, Somani B, Thomas K, Gambro G, et al. EAU guidelines on urolithiasis. 2022. p. 19–21. https://uroweb.org/guideline/urolithiasis.
2.
Van Cleynenbreugel B, Kılıç Ö, Akand M. Retrograde intrarenal surgery for renal stones: Part 1. Turk J Urol. 2017;43(2):112–21.
3.
Hendlin K, Weiland D, Monga M. Impact of irrigation systems on stone migration. J Endourol. 2008;22(3):453–8.
4.
Gross JB, Kokko JP. The influence of increased tubular hydrostatic pressure on renal function. J Urol. 1976;115(4):427–32.
5.
Breda A, Territo A, López-Martínez JM. Benefits and risks of ureteral access sheaths for retrograde renal access. Curr Opin Urol. 2016;26(1):70–5.
6.
Rehman J, Monga M, Landman J, Lee DI, Felfela T, Conradie MC, et al. Characterization of intrapelvic pressure during ureteropyeloscopy with ureteral access sheaths. Urology. 2003;61(4):713–8.
7.
Devarajan P. Biomarkers for the early detection of acute kidney injury. Curr Opin Pediatr. 2011;23(2):194–200.
8.
Schmid M, Dalela D, Tahbaz R, Langetepe J, Randazzo M, Dahlem R, et al. Novel biomarkers of acute kidney injury: evaluation and evidence in urologic surgery. World J Nephrol. 2015;4(2):160–8.
9.
Dede O, Dağguli M, Utanğaç M, Yuksel H, Bodakcı MN, Hatipoğlu NK, et al. Urinary expression of acute kidney injury biomarkers in patients after RIRS: it is a prospective, controlled study. Int J Clin Exp Med. 2015;8(5):8147–52.
10.
Daggulli M, Utangac MM, Dede O, Bodakci MN, Hatipoglu NK, Penbegul N, et al. Potential biomarkers for the early detection of acute kidney injury after percutaneous nephrolithotripsy. Ren Fail. 2016;38(1):151–6.
11.
Goger YE, Ozkent MS, Topcu C, Atıcı A, Sonmez MG, Balasar M, et al. Can urinary KIM-1 and NGAL predict management endoscopic surgery in acute unilateral obstructive stone disease? Results from a prospective cohort study. Urol Int 106(5), 2022:446–54.
12.
Senel C, Tuncel A, Balci M, Asfuroglu A, Aykanat C, Guzel O, et al. Safety and reliability of fluoroscopy-free technique in retrograde intrarenal surgery. Minerva Urol Nefrol. 2018;70(6):606–11.
13.
Jung H, Osther PJS. Intraluminal pressure profiles during flexible ureterorenoscopy. Springerplus. 2015;4:373.
14.
Thomsen HS. Pyelorenal backflow. Clinical and experimental investigations. Radiologic, nuclear, medical and pathoanatomic studies. Dan Med Bull. 1984;31(6):438–57.
15.
Kellum JA. Diagnostic criteria for acute kidney injury: present and future. Crit Care Clin. 2015;31(4):621–32.
16.
Murray PT, Devarajan P, Levey AS, Eckardt KU, Bonventre JV, Lombardi R, et al. A framework and key research questions in AKI diagnosis and staging in different environments. Clin J Am Soc Nephrol. 2008;3(3):864–8.
17.
Vanmassenhove J, Vanholder R, Nagler E, Van Biesen W. Urinary and serum biomarkers for the diagnosis of acute kidney injury: an in-depth review of the literature. Nephrol Dial Transplant. 2013;28(2):254–73.
18.
Fahmy N, Sener A, Sabbisetti V, Nott L, Lang RM, Welk BK, et al. Urinary expression of novel tissue markers of kidney injury after ureteroscopy, shockwave lithotripsy, and in normal healthy controls. J Endourol. 2013;27(12):1455–62.
19.
Olvera-Posada D, Dayarathna T, Dion M, Alenezi H, Sener A, Denstedt JD, et al. KIM-1 is a potential urinary biomarker of obstruction: results from a prospective cohort study. J Endourol. 2017;31(2):111–8.
20.
Ertaş K, Temiz MZ, Çolakerol A, Kucuk SH, Şahan A, Yuruk E. Effects of flexible ureteroscopy on kidney: a prospective clinical trial. Turk J Urol. 2020;46(4):297–302.
21.
Sener TE, Cloutier J, Villa L, Marson F, Buttice S, Doizi S, et al. Can we provide low intrarenal pressures with good irrigation flow by decreasing the size of ureteral access sheaths? J Endourol. 2016;30(1):49–55.
22.
Bolgeri M, Whiting D, Reche A, Manghat P, Sriprasad S. Neutrophil gelatinase-associated lipocalin (NGAL) as a biomarker of renal injury in patients with ureteric stones: a pilot study. J Clin Urol. 2020;14(1):21–8.
You do not currently have access to this content.