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Urolithiasis

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https://www.readbyqxmd.com/read/30219938/percutaneous-nephrostomy-vs-ureteral-stent-for-hydronephrosis-secondary-to-ureteric-calculi-impact-on-spontaneous-stone-passage-and-health-related-quality-of-life-a-prospective-study
#1
Nuno de Sousa Morais, José P Pereira, Paulo Mota, Emanuel Carvalho-Dias, João N Torres, Estêvão Lima
Ureteral calculi can be associated with urinary drainage blockage, requiring urinary diversion with percutaneous nephrostomy (PCN) or retrograde ureteral stent (RUS). Currently no evidence exists to support the superiority of one method over the other. This study proposes to compare both approaches regarding the probability of spontaneous stone passage (SSP) and its effect on patient's quality of life (QoL). A prospective trial was carried out from July to October of 2017. 50 patients were selected with hydronephrosis secondary to ureteral stones requiring urgent urinary diversion and divided into two groups according to diversion technique: percutaneous nephrostomy (PCN) or retrograde ureteral stent (RUS)...
September 15, 2018: Urolithiasis
https://www.readbyqxmd.com/read/30218116/development-of-a-two-stage-model-system-to-investigate-the-mineralization-mechanisms-involved-in-idiopathic-stone-formation-stage-2-in-vivo-studies-of-stone-growth-on-biomimetic-randall-s-plaque
#2
Allison L O'Kell, Archana C Lovett, Benjamin K Canales, Laurie B Gower, Saeed R Khan
Idiopathic stone formers often form calcium oxalate (CaOx) stones that are attached to calcium phosphate (CaP) deposits in the renal tissue, known as Randall's plaques (RP). Plaques are suggested to originate in the renal tubular basement membrane and spread into the interstitial regions where collagen fibrils and vesicles become mineralized; if the epithelium is breached, the RP becomes overgrown with CaOx upon exposure to urine. We have developed a two-stage model system of CaP-CaOx composite stones, consisting of Stage (1) CaP mineralized plaque, followed by Stage (2) CaOx overgrowth into a stone...
September 14, 2018: Urolithiasis
https://www.readbyqxmd.com/read/30132276/role-of-dusting-and-pop-dusting-using-a-high-powered-100-w-laser-machine-in-the-treatment-of-large-stones-%C3%A2-15-mm-prospective-outcomes-over-16-months
#3
Amelia Pietropaolo, Patrick Jones, Lily Whitehurst, Bhaskar K Somani
Ureteroscopy and laser stone fragmentation (URSL) has had recent advancements with the more powerful laser systems with the ability to 'dust' and 'pop-dust' the stone. We wanted to look at the outcomes of this method for large stones (≥ 15 mm) using our new 100 W holmium laser. Over a period of 16 months (January 2017-April 2018), 50 patients underwent URSL for minimum cumulative stone size of ≥ 15 mm. Data were collected prospectively on patient and stone demographics and outcomes of URSL. The laser setting used was a power of 0...
August 21, 2018: Urolithiasis
https://www.readbyqxmd.com/read/30109429/do-3d-calculated-volume-distribution-of-a-stone-in-pelvicalyceal-system-affect-complications-of-percutaneous-nephrolithotomy
#4
Sait Özbir, Hasan Anıl Atalay, Halil Lütfi Canat, Mehmet Gökhan Çulha
In our study, we examined the effect of the three-dimensional (3D) stone segmentation volume and its ratio to the renal collecting system on complication rates. Data from141 patients who underwent PCNL surgery were analyzed retrospectively. Volume segmentation of both the renal collecting system and stones was obtained from 3D segmentation software with the images on CT data. After creation of a 3D surface volume rendering of renal stones and the collecting system, segmentation of the renal collecting system volume (RCSV) and analyzed stone volume (ASV) was analyzed and the ASV-to-RCSV ratio was calculated...
August 14, 2018: Urolithiasis
https://www.readbyqxmd.com/read/30078089/efficacy-of-mirabegron-in-medical-expulsive-therapy
#5
Mehmet Solakhan, Omer Bayrak, Ersan Bulut
To show the efficacy of mirabegron for medical expulsive treatment, in patients had intramural located distal ureteral stone. A 80 patients had intramural ureteral stone were assessed retrospectively between April 2017 and January 2018. Mirabegron 50 mg/day + diclofenac 100 mg/day (group 1, n = 40), and only diclofenac 100 mg/day (group 2, n = 40) were administered to patients, consecutively. Age, gender, stone size, laterality, and severity of hydronephrosis were recorded. Spontaneous stone expulsion rates (SER), stone expulsion time, and the number of daily colic episodes were evaluated...
August 4, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29980798/high-prevalence-of-pediatric-urinary-tract-stones-in-xinjiang-uyghur
#6
Jian Huang, Hamulati Tusong, Abudukahaer Batuer, Aierken Tuerxun, Hans-Göran Tiselius, Wenqi Wu
The aim of the study was to report the characteristics of urolithiasis in Uyghur patients from Xinjiang, China. The composition of stones collected from 1863 patients in the Uyghur region of Xinjiang was analyzed. The median age of patients was 17 years [25th and 75th percentiles: 2, 36]. The stones were delivered by 1299 males (69.7%) and 564 females (30.3%). Calcium oxalate was the predominant stone component in 42.1% of the patients, followed by ammonium urate in 20.6%. Females had formed more stones of magnesium ammonium phosphate 8...
July 6, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29980797/protective-effect-of-pentoxifylline-on-oxidative-renal-cell-injury-associated-with-renal-crystal-formation-in-a-hyperoxaluric-rat-model
#7
Hayrettin Ozturk, Ayhan Cetinkaya, Tulin Siviloglu Firat, Buket Kin Tekce, Selma Erdogan Duzcu, Hulya Ozturk
The aim of the study is to investigate the effects of pentoxifylline (PTX) on the renal tubular cell injury and stone formation in a hyperoxaluric rat model induced by ethylene glycol and its possible underlying mechanisms. The study was performed with 30 male Wistar rats and randomized into three groups of teen. The sham-control (group 1) received only drinking water orally. The EG/untreated (group 2) received drinking water containing 0.75% EG for 4 weeks orally. The EG/PTX treated (group 3) received drinking water containing 0...
July 6, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29974193/impact-of-surgeon-s-experience-on-outcome-parameters-following-ureterorenoscopic-stone-removal
#8
I Wolff, S Lebentrau, A Miernik, T Ecke, C Gilfrich, B Hoschke, M Schostak, M May
Within the BUSTER trial, we analyzed the surgeon's amount of experience and other parameters associated with URS procedures regarding the stone-free rate, complication rate, and operative time. Patient characteristics and surgical details on 307 URS procedures were prospectively documented according to a standardized study protocol at 14 German centers 01-04/2015. Surgeon's experience was correlated to clinical characteristics, and its impact on the stone-free rate, complication rate, and operative time subjected to multivariate analysis...
July 4, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29959479/combined-antegrade-and-retrograde-access-to-difficult-ureters-revisiting-the-rendezvous-technique
#9
S R Keoghane, S J Deverill, J Woodhouse, V Shennoy, T Johnston, P Osborn
INTRODUCTION: Complex ureteric strictures present a significant challenge to the endourologist and uro-radiologist. Multiple separate interventions to try to cross the stricture are often attempted. We describe our experience managing a heterogenous patient group using the 'rendezvous' procedure. METHODS AND MATERIALS: 16 patients and 18 ureters (one bilateral procedure, and two separate procedures in one patient) underwent rendezvous procedures. Seven patients had coexisting ureteric calculi treated...
June 29, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29959478/testing-the-dogma-that-total-phospholipid-fatty-acid-composition-of-blood-plays-a-role-in-kidney-stone-pathogenesis-using-a-high-low-risk-human-model-results-from-a-pilot-study
#10
Allen L Rodgers, Dalielah Jappie-Mahomed, Paul J van Jaarsveld
Previous studies have suggested that ω-3 and ω-6 polyunsaturated fatty acid (PUFA) composition in plasma and red blood cell (RBC) total phospholipids plays a role in urolithiasis. Our aim was to test the robustness of this dogma by retrospectively comparing baseline profiles of these parameters in subjects from high- and low-stone-risk groups. The documented difference in stone occurrence in white (relatively common) (W) and black (rare) (B) subjects prompted us to select these groups as the high-low risk model for the study...
June 29, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29383416/calcium-receptor-signaling-and-citrate-transport
#11
Ryan W Walker, Shijia Zhang, Joycelynn A Coleman-Barnett, L Lee Hamm, Kathleen S Hering-Smith
The calcium sensing receptor (CaSR) in the distal nephron decreases the propensity for calcium stones. Here we investigate if the apical CaSR in the proximal tubule also prevents stone formation acting via regulation of apical dicarboxylate and citrate transport. Urinary citrate, partially reabsorbed as a dicarboxylate in the proximal tubule lumen, inhibits stone formation by complexing calcium. We previously demonstrated a novel apical calcium-sensitive dicarboxylate transport system in OK proximal tubule cells...
October 2018: Urolithiasis
https://www.readbyqxmd.com/read/29234857/high-frequency-and-wide-range-of-human-kidney-papillary-crystalline-plugs
#12
Léa Huguet, Marine Le Dudal, Marine Livrozet, Dominique Bazin, Vincent Frochot, Joëlle Perez, Jean-Philippe Haymann, Isabelle Brocheriou, Michel Daudon, Emmanuel Letavernier
Most of kidney stones are supposed to originate from Randall's plaque at the tip of the papilla or from papillary tubular plugs. Nevertheless, the frequency and the composition of crystalline plugs remain only partly described. The objective was to assess the frequency, the composition and the topography of papillary plugs in human kidneys. A total of 76 papillae from 25 kidneys removed for cancer and without stones were analysed by immunohistochemistry combined with Yasue staining, field emission-scanning electron microscopy and Fourier transformed infrared micro-spectroscopy...
August 2018: Urolithiasis
https://www.readbyqxmd.com/read/29085969/etiologic-risk-factors-and-vitamin-d-receptor-gene-polymorphisms-in-under-one-year-old-infants-with-urolithiasis
#13
Ezgi Yangın Ergon, İpek Ozunan Akil, Fatma Taneli, Arzu Oran, Beyhan Cengız Ozyurt
The incidence of urinary tract stones in infancy has been increasing in Turkey. Risk factors and vitamin D receptor (VDR) gene polymorphisms were investigated in infants aged < 1 year who had stones. Forty infants with urinary tract stones and 80 infants without stones, aged < 1 year were enrolled in this study. Detailed surveys were taken of all infants, metabolic parameters and ApaI and FokI VDR gene polymorphisms were investigated. Infants with stones tended to be more commonly fed formula and multivitamins (vitamins A, C, D) (p < 0...
August 2018: Urolithiasis
https://www.readbyqxmd.com/read/29026958/histological-changes-caused-by-the-prolonged-placement-of-ureteral-access-sheaths-an-experimental-study-in-porcine-model
#14
Mehmet Özsoy, Iason Kyriazis, Theofanis Vrettos, Dimitrios Kotsiris, Panteleeimon Ntasiotis, Christian Seitz, Liatsikos Evangelos, Kallidonis Panagiotis
The objective is to evaluate the histological damage to the ureteral wall caused by the prolonged placement of an access sheath in porcine model. Six ureters from three female pigs were randomized into three groups. In each group, an UAS with different indwelling time was inserted. 9.5/11.5 Fr Flexor® ureteral access sheaths were inserted in both ureters with left indwelling for 30 min and right for 60 min. The ureteral access sheath was advanced up to the proximal ureter. No resistance was observed during the insertion...
August 2018: Urolithiasis
https://www.readbyqxmd.com/read/28980082/accuracy-of-daily-fluid-intake-measurements-using-a-smart-water-bottle
#15
Michael S Borofsky, Casey A Dauw, Nadya York, Colin Terry, James E Lingeman
High fluid intake is an effective preventative strategy against recurrent kidney stones but is known to be challenging to achieve. Recently, a smart water bottle (Hidrate Spark™, Minneapolis, MN) was developed as a non-invasive fluid intake monitoring system. This device could help patients who form stones from low urine volume achieve sustainable improvements in hydration, but has yet to be validated in a clinical setting. Hidrate Spark™ uses capacitive touch sensing via an internal sensor. It calculates volume measurements by detecting changes in water level and sends data wirelessly to users' smartphones through an application...
August 2018: Urolithiasis
https://www.readbyqxmd.com/read/28756458/comparison-of-intermediate-and-low-frequency-shock-wave-lithotripsy-for-pediatric-kidney-stones
#16
Onur Kaygısız, Hakan Kılıçarslan, Ahmet Mert, Burhan Coşkun, Yakup Kordan
The aim of the study to compare low and intermediate shock wave frequency rates in terms of success and complications for treating pediatric kidney stones. This retrospective study was performed on 58 consecutive pediatric patients (24 girls, 34 boys) who underwent shock wave lithotripsy (SWL) for kidney stones with an electrohydraulic lithotripter between April 2014 and March 2016. In the first year, all children underwent SWL with a frequency of 90 SWs/min as an intermediate frequency (Group 90), and in the second year all children were treated by SWL using 60 SWs/min as a low frequency (Group 60)...
August 2018: Urolithiasis
https://www.readbyqxmd.com/read/28718073/a-randomised-phase-ii-iii-study-to-evaluate-the-efficacy-and-safety-of-orally-administered-oxalobacter-formigenes-to-treat-primary-hyperoxaluria
#17
Dawn Milliner, Bernd Hoppe, Jaap Groothoff
Primary hyperoxaluria (PH) patients overproduce oxalate because of rare genetic errors in glyoxylate metabolism. Recurrent urolithiasis and/or progressive nephrocalcinosis are PH hallmarks and can lead to kidney damage, systemic oxalosis and death. Based on previous studies, we hypothesised that treatment with the oxalate-metabolizing bacterium Oxalobacter formigenes would mediate active elimination of oxalate from the plasma to the intestine of PH patients, thereby reducing urinary oxalate excretion (Uox)...
August 2018: Urolithiasis
https://www.readbyqxmd.com/read/28702679/predictive-factors-of-bleeding-among-pediatric-patients-undergoing-percutaneous-nephrolithotomy
#18
Cagri Senocak, Ridvan Ozbek, Omer Faruk Bozkurt, Ali Unsal
The purpose of this study is to determine the perioperative risk factors for increased blood loss in children undergoing percutaneous nephrolithotomy (PCNL).We retrospectively reviewed the data on pediatric patients who had undergone PCNL for stone disease in our department. Blood loss estimation was quantified by measuring the changes in hematocrit plus the volume of red blood cells transfused. Univariate and multivariate linear regression analyses were performed to evaluate risk factors associated with increased blood loss after pediatric PCNL...
August 2018: Urolithiasis
https://www.readbyqxmd.com/read/28695238/predictive-risk-factors-for-systemic-inflammatory-response-syndrome-following-ureteroscopic-laser-lithotripsy
#19
Yusuke Uchida, Ryoji Takazawa, Sachi Kitayama, Toshihiko Tsujii
The objective of this study was to investigate risk factors for the development of systemic inflammatory response syndrome following ureteroscopic laser lithotripsy. We retrospectively collected data of 469 patients who underwent ureteroscopic laser lithotripsy at our single institution from February 2008 to June 2016. Details for the patient, the stone, and the surgical factors that potentially contributed to postoperative infection were extracted. Using a logistic regression model, we analyzed how the clinical factors affected the incidence of systemic inflammatory response syndrome...
August 2018: Urolithiasis
https://www.readbyqxmd.com/read/28681267/intravenous-paracetamol-vs-ibuprofen-in-renal-colic-a-randomised-double-blind-controlled-clinical-trial
#20
E Cenker, M Serinken, E Uyanık
Pain management is one of the essentials of emergency care. Renal colic secondary to urinary stone disease forms one of the most intense pain types. The present study aimed to compare the effect of intravenous ibuprofen to paracetamol in ceasing renal colic. This randomised double-blind study was composed of two intervention arms, intravenous paracetamol and intravenous ibuprofen. Study subjects were randomised to receive a single dose of either paracetamol, 1 g in 100 ml normal saline, or ibuprofen (800 mg in 100 ml normal saline) in a blinded fashion...
August 2018: Urolithiasis
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