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[Prognosis of ureteral dilatation during procedures using a ureteral access sheath in patients with urolithiasis].
Urologiia
March 2024
FGBVOU VO S.M. Kirov Military Medical Academy of the Ministry of Defense of Russian Federation, Saint Petersburg, Russia.
Aim: To improve the results of treatment of patients with urolithiasis who underwent endoscopic interventions using a ureteral access sheath (UAS) by developing a predictive model of ureteral dilatation without pre-stenting.
Materials And Methods: A total of 180 patients with kidney stones up to 20 mm were included in the study. They were divided into two groups: in the group 1 (n=79) UAS of 12/14 Ch was used, while in group II (n=101) UAS of 10/12 Ch was inserted.
Fluid dynamics within renal cavities during endoscopic stone surgery: does the position of the flexible ureteroscope and ureteral access sheath affect the outflow rate?
World J Urol
April 2024
Department of Urology, University of Patras, 26504, Patras, Greece.
Article Synopsis
- The study aimed to assess how the position of the ureteroscope and the ureteral access sheath (UAS) affects fluid flow during retrograde intrarenal surgery (RIRS).
- Researchers analyzed data from 74 patients, finding that upper and middle calyces had higher outflow rates compared to lower calyx regardless of UAS position, but adjusting the UAS to a lower position decreased flow rates in the upper/middle calyces while increasing it in the lower calyx.
- The results indicate that while there is a statistically significant improvement in fluid dynamics in the lower calyx when the UAS is lower, the overall absolute changes in upper and middle calyceal
Mechanosensitive modulation of peristaltic contractions in the mouse renal pelvis.
Eur J Pharmacol
April 2022
Department of Cell Physiology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan. Electronic address:
The renal pelvis develops spontaneous phasic contractions (SPCs) that underlie pyeloureteric peristalsis. Increased urine flow into the renal pelvis mechanically stimulates the contractile machinery within the renal pelvis to facilitate the propagation of peristalsis. Here, the effects of mechanostimulation of the pelvicalyceal junction (PCJ), where SPCs originate from, on the properties of SPCs were investigated.
View Article and Find Full Text PDFDiuretic Enhanced Ultrasonography in the Diagnosis of Pyeloureteral Obstruction.
Medicina (Kaunas)
October 2019
Clinic of Gastroenterology, Nephrourology and Surgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, 08406 Vilnius, Lithuania.
: To determine the value of diuretic ultrasonography for the diagnosis of obstructive hydronephrosis. : Diuretic enhanced ultrasonography was used routinely as a part of examination of patients with hydronephrosis in our Department. There were 72 patients (42 males, 30 females; aged 2 months to 17 years; median age 7.
View Article and Find Full Text PDF[Giant hydronephrosis associated with ureterocele complicated by ureteral lithiasis].
Pan Afr Med J
September 2019
Service d'Urologie, Centre Hospitalier Universitaire Hassan II, Fès, Maroc.
Giant hydronephrosis is defined as an extensive dilation of the pyelocaliceal cavities occupying a large part of the abdominal cavity or as a dilation filled up with more than a liter of urine overflowing the median line. This is due, more often, to pyelo-ureteral junction syndrome. Obstruction due to ureterocele complicated by lithiasis is a very rare cause of giant hydronephrosis.
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