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Urolithiasis

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https://www.readbyqxmd.com/read/29119224/impact-of-repeated-extracorporeal-shock-wave-lithotripsy-on-prepubertal-rat-kidney
#1
Jae Min Chung, Bu Kyung Park, Jung Hee Kim, Hyun Jung Lee, Sang Don Lee
This study aimed to investigate the effects of repeated extracorporeal shock wave lithotripsy (ESWL) on the kidneys of prepubertal and adult rats. Thirty rats were used: 15 were prepubertal (3 weeks of age) with an average body weight of 72.3 ± 3.3 g, and 15 were adults with of 265 ± 11.3 g. The prepubertal and adult rats were separately and randomly allocated to three groups, each consisting of five rats. Following anesthetization, the left kidney of each rat in each group received shock waves in one, two, or three sessions separated by 72 h...
November 8, 2017: Urolithiasis
https://www.readbyqxmd.com/read/29101428/composition-of-urinary-calculi-in-infants-a-report-from-an-endemic-country
#2
Mirza Naqi Zafar, Salma Ayub, Hafsa Tanwri, Syed Ali Anwar Naqvi, Syed Adibul Hasan Rizvi
Pediatric urolithiasis remains endemic in low-resource countries where infants constitute 17-40% of all children with urolithiasis. This study reports socio-economic factors, medical history and chemical composition of urinary stones in 976 infants of up to 2 years of age. Between 1992 and 2016, 976 infants presented to our institute with 1038 stones. Chemical composition of stones was analyzed by Fourier transformation infrared spectroscopy (FTIR). The mean age of infants was 19.5 ± 5.74 months with a M:F ratio of 5...
November 3, 2017: Urolithiasis
https://www.readbyqxmd.com/read/29094191/preoperative-double-j-stent-placement-can-improve-the-stone-free-rate-for-patients-undergoing-ureteroscopic-lithotripsy-a-systematic-review-and-meta-analysis
#3
REVIEW
Yubo Yang, Yin Tang, Yunjin Bai, Xiaoming Wang, Dechao Feng, Ping Han
To evaluate the efficiency and safety of preoperative double-J stent placement for patients undergoing ureteroscopic lithotripsy. Eligible studies were identified from electronic databases (PubMed, Embase, the Cochrane Central Register of Controlled Trials, and the Cochrane Database of Systematic Reviews). All analyses were performed by the Review Manager 5.3 (The Cochrane Collaboration, Oxford, UK). Stone-free rate (SFR) was regarded as primary outcome. Second outcomes, including operation time, complication rates as well as major complication rates were also assessed...
November 1, 2017: Urolithiasis
https://www.readbyqxmd.com/read/29085969/etiologic-risk-factors-and-vitamin-d-receptor-gene-polymorphisms-in-under-one-year-old-infants-with-urolithiasis
#4
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...
October 30, 2017: Urolithiasis
https://www.readbyqxmd.com/read/29075893/radiologic-evaluation-of-children-prior-to-swl-to-what-extent-they-are-exposed-to-radiation
#5
Bilal Eryildirim, Ozlem Turkoglu, Cemal Goktas, Ovunc Kavukoglu, Rasim Guzel, Kemal Sarica
The objective of this study is to evaluate the average radiation exposure in children with renal stones before SWL treatment. Mean radiation exposure values were evaluated in 110 children before SWL treatment. While some children referred to the emergency department (ED) with colic pain, remaining cases referred to outpatient department (OD). Although low-dose NCCT was performed in ED; KUB and abdominal sonography were first performed in other cases referring to OD where CT has been applied if needed. The type of imaging modality used and the mean radiation exposure were evaluated and comparatively evaluated with respect to the department referred, patient as well as stone related parameters...
October 26, 2017: Urolithiasis
https://www.readbyqxmd.com/read/29026958/histological-changes-caused-by-the-prolonged-placement-of-ureteral-access-sheaths-an-experimental-study-in-porcine-model
#6
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...
October 12, 2017: Urolithiasis
https://www.readbyqxmd.com/read/28980082/accuracy-of-daily-fluid-intake-measurements-using-a-smart-water-bottle
#7
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...
October 4, 2017: Urolithiasis
https://www.readbyqxmd.com/read/28884349/functional-and-morphological-recovery-of-solitary-kidneys-after-drainage-double-j-stent-placement-vs-emergency-ureteroscopy-which-one-is-reasonable
#8
Kemal Sarica, Fatih Tarhan, Kutluhan Erdem, Ahmet Halil Sevinc, Rasim Guzel, Bilal Eryildirim
The purpose of the study was to evaluate the functional and morphological recovery of solitary kidneys following the relief of obstruction by two different approaches. Data of 65 adult patients with acute renal failure in obstructed solitary kidney were evaluated. Depending on the type of emergent decompression procedure while 34 patients were treated with a double J stent placement only 31 patients underwent ureteroscopic lithotripsy with double J stent placement. Following these procedures, in addition to the amount of excreted urine during the first 24 h, changes in the serum creatinine levels and the degree of hydronephrosis were noted and evaluated during the first week of follow-up after intervention...
September 7, 2017: Urolithiasis
https://www.readbyqxmd.com/read/28357451/comparison-of-supine-and-prone-positions-for-percutaneous-nephrolithotomy-in-treatment-of-staghorn-stones
#9
Mehmet İlker Gökce, Arif Ibiş, Adem Sancı, Aykut Akıncı, Uygar Bağcı, Eylül Asya Ağaoğlu, Evren Süer, Ömer Gülpınar
INTRODUCTION: Percutaneous nephrolithotomy (PNL) is the primary treatment modality for management of staghorn stones. PNL in supine position has important advantages over prone positon. However, studies comparing prone and supine positions for PNL in staghorn stone patients have conflicting results, and the aim of the current study was to compare prone and supine positions for PNL in staghorn stone cases. PATIENTS AND METHODS: Data of patients underwent PNL for staghorn stones in supine or prone position by a single urologist were collected prospectively...
December 2017: Urolithiasis
https://www.readbyqxmd.com/read/28324150/stress-stones-stress-recurrent-stones-a-self-propagating-cycle-difficulties-in-solving-this-dichotomy
#10
Montserrat Arzoz-Fabregas, Josep Roca-Antonio, Luis Ibarz-Servio, Dalielah Jappie-Mahomed, Allen Rodgers
Numerous studies have reported an association between stress and urolithiasis. Although urinary risk factors have been measured in several of these, compelling evidence of a causal relationship has not been established. A shortcoming is that alterations in single urinary parameters rather than ratios and quotients, which provide a more synergistic risk evaluation, have been measured. Recently, we speculated about a possible association between chronic stress and stone recurrence. This presents an intriguing dichotomy of whether stress causes stones or vice versa, or whether they are linked in a self-propagating stress-stones-stress-recurrence cycle...
December 2017: Urolithiasis
https://www.readbyqxmd.com/read/28299446/do-renal-stones-that-fail-lithotripsy-require-treatment
#11
Ben Pullar, Catherine Lunter, Jane Collie, Syed Shah, Nimish Shah, Sami Hayek, Oliver J Wiseman
The rates of extracorporeal shock wave lithotripsy (SWL) appear stable in the UK. However, there is little evidence on the natural history of these calculi if SWL fails. We set to look at the effectiveness of SWL in patients with a single, previously untreated renal stone and the natural history of those stones that failed treatment. We retrospectively reviewed all data from our prospectively collected database of patients undergoing a first treatment for a single renal stone between October 2010 and November 2013...
December 2017: Urolithiasis
https://www.readbyqxmd.com/read/28286933/the-effect-of-nephrostomy-tract-infiltration-of-ketamine-on-postoperative-pain-and-peak-expiratory-flow-rate-in-patients-undergoing-tubeless-percutaneous-nephrolithotomy-a-prospective-randomized-clinical-trial
#12
Seyed Reza Hosseini, Farsad Imani, Golnar Shayanpour, Mohammad Reza Khajavi
Ketamine, as a systemic and local analgesic, has been used to reduce postoperative pain in many studies. The present study was designed to assess the analgesic efficacy of nephrostomy tract infiltration of ketamine in postoperative pain after tubeless percutaneous nephrolithotomy (PCNL). Sixty-six patients with renal stone who were candidates for PCNL were randomized to two groups with 33 patients in each group. In group K, 20 mL saline solution containing 1.5 mg/kg ketamine was infiltrated into the nephrostomy tract and in group C, 20 mL saline solution was infiltrated into the nephrostomy tract at the end of surgery...
December 2017: Urolithiasis
https://www.readbyqxmd.com/read/28258472/prevalence-of-renal-uric-acid-stones-in-the-adult
#13
Alberto Trinchieri, Emanuele Montanari
The aim of this study was to estimate uric acid renal stone prevalence rates of adults in different countries of the world. PubMed was searched for papers dealing with "urinary calculi and prevalence or composition" for the period from January 1996 to June 2016. Alternative searches were made to collect further information on specific topics. The prevalence rate of uric acid stones was computed by the general renal stone prevalence rate and the frequency of uric acid stones in each country. After the initial search, 2180 papers were extracted...
December 2017: Urolithiasis
https://www.readbyqxmd.com/read/28233025/emergent-versus-delayed-lithotripsy-for-obstructing-ureteral-stones-a-cumulative-analysis-of-comparative-studies
#14
Davide Arcaniolo, Marco De Sio, Jens Rassweiler, Jilian Nicholas, Estevão Lima, Giuseppe Carrieri, Evangelos Liatsikos, Vincenzo Mirone, Manoj Monga, Riccardo Autorino
OBJECTIVE: To analyze the current evidence on the use of ureteroscopy (URS) and extracorporeal shock wave lithotripsy (ESWL) for the management of obstructing ureteral stones in emergent setting. METHODS: A systematic literature review was performed up to June 2016 using Pubmed and Ovid databases to identify pertinent studies. The PRISMA criteria were followed for article selection. Separate searches were done using a combinations of several search terms: "laser lithotripsy", "ureteroscopy", "extracorporeal shock wave lithotripsy", "ESWL", "rapid", "immediate", "early", "delayed", "late", "ureteral stones", "kidney stones", "renal stones"...
December 2017: Urolithiasis
https://www.readbyqxmd.com/read/28229197/minimally-invasive-percutaneous-nephrolithotomy-vs-standard-pcnl-for-management-of-renal-stones-in-the-flank-free-modified-supine-position-single-center-experience
#15
Ahmed Sakr, Emad Salem, Mostafa Kamel, Esam Desoky, Ahmed Ragab, Mohamed Omran, Amr Fawzi, Ashraf Shahin
To assess the safety and efficacy of minimally invasive percutaneous nephrolithotomy (mPCNL) as compared to standard PCNL (sPCNL) for management of 2-3-cm renal stones in the flank-free modified supine position. Between September 2010 and December 2013, 150 patients (168 renal units) with 2-3-cm renal stones were prospectively randomized into two treatment groups; Group A (75 patients/87 renal units) treated by mPCNL and Group B (75 patients/81 renal units) treated by sPCNL. In both groups, the patients were placed in the flank-free modified supine position...
December 2017: Urolithiasis
https://www.readbyqxmd.com/read/28229196/the-impact-of-ureteral-stent-indwelling-time-on-the-treatment-of-acute-infection-caused-by-ureteral-calculi
#16
Yun-Feng Shi, Wen-Long Ju, Yi-Ping Zhu, Shu-Jie Xia, Xiao-Wen Sun
Ureteric stenting is an effective drainage method in patients with acute urinary tract infection caused by ureteral calculi; however, the optimal ureteral stent indwelling time has not been clearly defined. The aim of this study was to evaluate the effect of ureteric stent indwelling time on the treatment of acute infection secondary to urinary tract calculi. A total of 142 patients with acute infection caused by urinary tract calculi were identified retrospectively from January 2011 to August 2015 at our institution...
December 2017: Urolithiasis
https://www.readbyqxmd.com/read/28229195/predictors-for-uroseptic-shock-in-patients-who-undergo-minimally-invasive-percutaneous-nephrolithotomy
#17
Junhong Fan, Shawpong Wan, Luhao Liu, Zhijian Zhao, Zanlin Mai, Dong Chen, Wei Zhu, Zhou Yang, Lili Ou, Wenqi Wu
To identify risk factors that can predict which patient is likely to progress from systemic inflammatory response syndrome (SIRS) to uroseptic shock after minimally invasive percutaneous nephrolithotomy (MPCNL) for the upper urinary tract stones. We retrospectively reviewed 156 patients who suffered infectious complications after MPCNL from March 2014 to February 2016. Perioperative risk factors that could potentially contribute to uroseptic shock were compared to those of patients with only SIRS. 135 of the 156 patients developed to SIRS only, the remaining 21 patients progressed to uroseptic shock...
December 2017: Urolithiasis
https://www.readbyqxmd.com/read/27981376/vitamin-d-deficiency-is-prevalent-among-idiopathic-stone-formers-but-does-correction-pose-any-risk
#18
Nikhil Johri, Philippe Jaeger, Pietro M Ferraro, Linda Shavit, Devaki Nair, William G Robertson, Giovanni Gambaro, Robert J Unwin
While vitamin D (vitD) deficiency is thought to contribute to poor health in a variety of ways and should be corrected, there is still concern about giving vitD supplements to patients with a history of nephrolithiasis. The aim is to study the prevalence of vitD deficiency and the effect on stone risk of cholecalciferol (vitD3) supplementation in a cohort of idiopathic stone formers (ISF). We screened for vitD deficiency and urinary measures of stone risk, comparing vitD deficient (serum 25-OH vitD ≤30 nmol/L; ≤12 ng/mL) with vitD insufficient (31-75 nmol/L; 13-30 ng/mL) or vitD replete (>75 nmol/L; >30 ng/mL); we investigated the effect of giving vitD3 (20,000 IU orally, weekly for 4 months) to 37 of the vitD deficients...
December 2017: Urolithiasis
https://www.readbyqxmd.com/read/27942796/calcium-urolithiasis-course-in-young-stone-formers-is-influenced-by-the-strength-of-family-history-results-from-a-retrospective-study
#19
Angela Guerra, Andrea Ticinesi, Franca Allegri, Antonio Nouvenne, Silvana Pinelli, Fulvio Lauretani, Marcello Maggio, Gianfranco Cervellin, Loris Borghi, Tiziana Meschi
The role of the strength of family history of stones (FHS), i.e., degree of relatives with the disease, on the course of calcium urolithiasis (CU) is not fully understood, particularly in young patients where genetic background has the greatest influence on disease expression. Thus, with a retrospective cross-sectional design, we examined baseline clinical parameters and urinary chemistries of 369 subjects (196 M) with CU and 96 controls (41 M) aged between 15 and 25 at the time of the first visit at our stone clinic...
December 2017: Urolithiasis
https://www.readbyqxmd.com/read/27882414/systemic-endothelial-function-measured-by-flow-mediated-dilation-is-impaired-in-patients-with-urolithiasis
#20
Esin Yencilek, Hakan Sarı, Faruk Yencilek, Ezgi Yeşil, Hasan Aydın
Some in vitro and animal studies have shown endothelial dysfunction in hyperoxaluria models indicating its role in pathogenesis of urolithiasis and relation to CVD. The aim of this study was to investigate endothelial function in patients with urolithiasis in relation to urinary stone risk factors and metabolic parameters. A total of 120 subjects without any known CVD (60 with urolithiasis and 60 healthy subjects) were included into study. Fasting blood and 24-h urine samples were collected to study metabolic parameters (glucose and lipids) and urine stone risk factors (oxalate, citrate, uric acid, and calcium, pH)...
December 2017: Urolithiasis
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