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Renal calculi

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https://www.readbyqxmd.com/read/28436367/bilateral-obstructing-ureteric-calculi-in-pregnancy-a-rare-cause-of-acute-renal-failure
#1
Todd G Manning, Daniel Christidis, David Wetherell, Ruth Cameron-Jeffs, Nathan Lawrentschuk
Bilateral obstructing ureteric calculi is a rare cause of acute renal failure. Although urolithiasis in later pregnancy is not uncommon, the development of bilateral obstruction secondary to ureteric calculi in the first trimester is rare and poses difficulty to diagnosis and management. Symptoms of diseases and physiological changes associated with pregnancy can obscure diagnosis of urolithiasis and obstructive uropathy. Advances in minimally invasive endourology afford intervention with reduced risk to fetal health...
April 2017: Canadian Journal of Urology
https://www.readbyqxmd.com/read/28436364/upper-pole-urologist-obtained-percutaneous-renal-access-for-pcnl-is-safe-and-efficacious
#2
Amar P Patel, Don Bui, John Pattaras, Kenneth Ogan
INTRODUCTION: Interventional radiologist may be hesitant to obtain upper pole access for percutaneous nephrolithotomy (PCNL) due to a higher complication rate. Renal access gained by urologists may achieve higher stone-free rates with similar complication rates. We evaluate our institution's contemporary results of percutaneous renal access in the upper pole for nephrolithotomy by urologists, which we believe both safe and efficacious. MATERIALS AND METHODS: This retrospective chart review included all PCNL's performed by fellowship-trained endourologists from 2003 to 2014 at a single institution...
April 2017: Canadian Journal of Urology
https://www.readbyqxmd.com/read/28434428/local-response-of-sialoliths-to-lithotripsy-cues-on-fragmentation-outcome
#3
Pedro Nolasco, Ana J Dos Anjos, José Dias, Paulo V Coelho, Carla Coelho, Manuel Evaristo, Albano Cavaleiro, António Maurício, Manuel F C Pereira, Virgínia Infante, António P Alves de Matos, Raúl C Martins, Patricia A Carvalho
Lithotripsy methods show relatively low efficiency in the fragmentation of sialoliths compared with the success rates achieved in the destruction of renal calculi. However, the information available on the mechanical behavior of sialoliths is limited and their apparently tougher response is not fully understood. This work evaluates the hardness and Young's modulus of sialoliths at different scales and analyzes specific damage patterns induced in these calcified structures by ultrasonic vibrations, pneumoballistic impacts, shock waves, and laser ablation...
April 24, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28430340/transurethral-contact-ureterolithotripsy-in-gas-%C3%B0-%C3%B0-2-medium
#4
Dmitry O Korolev, Peter V Glybochko, Leonid M Rapoport, Dmitry G Tsarichenko
BACKGROUND: Transurethral intracorporeal lithotripsy is the modality of choice for the endoscopic disintegration of large, long-standing, radiolucent or high-density stones. Despite several advantages and proven benefits of contact ureterolithotripsy/ureterolithoextraction (CULT), the application of irrigation carries significant risks of untoward perioperative events including retrograde stone migration and postoperative pyelonephritis. METHODS: We describe a new technique - endoscopic intracorporeal lithotripsy in the gas (СО2) medium...
April 14, 2017: Urologia
https://www.readbyqxmd.com/read/28427449/urolithiasis-analysis-in-a-multiethnic-population-at-a-tertiary-hospital-in-nairobi-kenya
#5
Francis K Wathigo, Alfred Hayombe, Daniel Maina
BACKGROUND: Urolithiasis is a global problem whose incidence is reported to be on the rise across the world. Previously, urolithiasis was reported as being rare among the indigenous African population but recent data suggest otherwise. This study reviewed the demographic and clinical characteristics of patients with urolithiasis seen at the Aga Khan University hospital Nairobi (AKUHN) as well as the chemical composition of the stones and the modalities of therapy used. METHODS: This was a retrospective study which utilized patients' clinical and laboratory records from 2013 to 2014...
April 20, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28424736/a-case-of-xanthogranulomatous-pyelonephritis-associated-with-renoduodenal-fistula
#6
R Conor Holton-Burke, Mini Varughese
Xanthogranulomatous pyelonephritis (XGP) is a rare form of pyelonephritis associated with repeated infection, chronic inflammation, and obstruction. Various fistulas, including those to the intestine, are a known association with XGP. Here, a 55-year-old woman with a history of multiple previous renal calculi presented with dysuria and back pain. Contrast-enhanced computed tomography (CT) revealed a soft tissue density in her renal pelvis and perirenal space consistent with XGP along with a tract connecting the upper pole of her right kidney to the second portion of the duodenum...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28417852/nuclear-medicine-in-pediatric-nephro-urology-an-overview
#7
REVIEW
Iosif Mendichovszky, Bernardita Troncoso Solar, Naima Smeulders, Marina Easty, Lorenzo Biassoni
In the context of ante-natally diagnosed hydronephrosis, the vast majority of children with a dilated renal pelvis do not need any surgical treatment, as the dilatation resolves spontaneously with time. Slow drainage demonstrated at Tc-99m-mercaptoacetyltriglycine (MAG3) renography does not necessarily mean obstruction. Obstruction is defined as resistance to urinary outflow with urinary stasis at the level of the pelvic-ureteric junction (PUJ) which, if left untreated, will damage the kidney. Unfortunately this definition is retrospective and not clinically helpful...
May 2017: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/28367661/increased-prevalence-of-premature-ejaculation-in-men-with-metabolic-syndrome
#8
Nader Salama, Ahmed Eid, Ahmed Swedan, Alaa Hatem
This prospective study aimed to investigate the relationship between metabolic syndrome (Met S) and premature ejaculation (PE) among men. The study included 300 consecutive male patients (53.6 y ± 8.7) who attended the urology clinic (December 2013-September 2014), mostly complaining of renal/ureteric calculi. A diagnostic approach was undertaken to include demographics, clinical features and laboratory investigations of the study subjects. Both erectile function and PE were evaluated using the International Index of Erectile Function (abridged form, IIEF-5) and Premature Ejaculation Diagnostic Tool (PEDT) questionnaires, respectively...
February 21, 2017: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
https://www.readbyqxmd.com/read/28359409/surgical-management-of-urinary-stones-with-abnormal-kidney-anatomy
#9
Giray Ergin, Mustafa Kirac, Ali Unsal, Burak Kopru, Mustafa Yordam, Hasan Biri
In spite of the fact that urologic surgical techniques used by urologists are becoming more and more minimally invasive and easier because of developing technologies, surgical approaches for the urinary stones in kidneys with abnormal anatomy are still confusing. The objective of this article is to determine the treatment options in these kidneys. For this purpose, between 2005 and 2015, we retrospectively evaluated patients operated for urolithiasis with various congenital renal anomalies in five referral urology clinics in our country...
April 2017: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/28355093/a-multi-institutional-study-of-struvite-stones-patterns-of-infection-and-colonization
#10
Egor Parkhomenko, Adam De Fazio, Timothy Tran, Julie Thai, Kyle Blum, Mantu Gupta
OBJECTIVE: To examine urine and stone bacteriology of struvite stone formers in a large cohort of patients undergoing percutaneous nephrolithotomy (PCNL). MATERIALS AND METHODS: A total of 1191 patients, with stone and urine cultures, treated with PCNL for renal calculi were included in the study. Statistical differences were assessed using Mann-Whitney U and T-tests. RESULTS: Stone cultures were positive in 72% of patients with struvite stones...
March 29, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28351191/acute-kidney-injury-after-percutaneous-nephrolithotomy-for-stones-in-solitary-kidneys
#11
Ahmed R El-Nahas, Diaa-Eldin Taha, Hussien M Ali, Ahmed M Elshal, Mohamed H Zahran, Nasr A El-Tabey, Ahmed M El-Assmy, Ahmed M Harraz, Hazem E Moawad, Mahmoud M Othman
OBJECTIVES: The aim of this study was to report the incidence, severity, outcome and risk factors of acute kidney injury (AKI) following percutaneous nephrolithotomy (PNL) in solitary kidneys. METHODS: The study included consecutive adult patients who underwent PNL for treatment of calculi in a solitary kidney between May 2012 and July 2015. Patients with congenital renal anomalies or with stages 4 and 5 chronic kidney disease (CKD) were excluded. Serum creatinine levels were measured the day before PNL, daily after PNL for 2-5 days and after 3 months...
March 29, 2017: Scandinavian Journal of Urology
https://www.readbyqxmd.com/read/28350929/effect-of-vitamin-d-and-calcium-supplementation-on-cancer-incidence-in-older-women-a-randomized-clinical-trial
#12
RANDOMIZED CONTROLLED TRIAL
Joan Lappe, Patrice Watson, Dianne Travers-Gustafson, Robert Recker, Cedric Garland, Edward Gorham, Keith Baggerly, Sharon L McDonnell
Importance: Evidence suggests that low vitamin D status may increase the risk of cancer. Objective: To determine if dietary supplementation with vitamin D3 and calcium reduces the risk of cancer among older women. Design, Setting, and Participants: A 4-year, double-blind, placebo-controlled, population-based randomized clinical trial in 31 rural counties (June 24, 2009, to August 26, 2015-the final date of follow-up). A total of 2303 healthy postmenopausal women 55 years or older were randomized, 1156 to the treatment group and 1147 to the placebo group...
March 28, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28349055/antiurolithiasis-activity-of-bioactivity-guided-fraction-of-bergenia-ligulata-against-ethylene-glycol-induced-renal-calculi-in-rat
#13
Ikshit Sharma, Washim Khan, Rabea Parveen, Md Javed Alam, Iftekhar Ahmad, Mohd Hafizur Rehman Ansari, Sayeed Ahmad
Dried rhizome of Bergenia ligulata (pashanbhed) is commonly used as a traditional herbal medicine with a wide range of therapeutic applications including urolithiasis. Aqueous extract of B. ligulata was prepared through maceration followed by decoction (mother extract, 35.9% w/w). Further, polarity based fractions were prepared successively from mother extract which yielded 3.4, 2.9, 5.4, 7.5, and 11.3% w/w of hexane, toluene, dichloromethane (DCM), n-butanol, and water fractions, respectively. The in vitro, ex vivo, and real-time antiurolithiasis activity of mother extract and fractions were carried out using aggregation assay in synthetic urine and in rat plasma...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28346915/safety-and-efficacy-of-flexible-ureteroscopy-in-combination-with-holmium-laser-lithotripsy-for-the-treatment-of-bilateral-upper-urinary-tract-calculi
#14
Bing Yang, Hao Ning, Zheng Liu, Yi Zhang, Chengfan Yu, Xianghua Zhang, Dongliang Pan, Kejia Ding
OBJECTIVE: To retrospectively evaluate the safety and efficacy of flexible ureteroscopy (FURS) in combination with holmium laser lithotripsy for the treatment of bilateral upper urinary calculi. MATERIALS AND METHODS: The stone-free status was defined as the absence of any stones or asymptomatic status, or the presence of clinically insignificant residual fragments <4 mm, and was assessed by plain kidney, ureter, and bladder X-ray. The operative time, stone-free rates (SFRs), serum creatinine (SCr), and complications were recorded...
March 28, 2017: Urologia Internationalis
https://www.readbyqxmd.com/read/28324714/association-between-nephrolithiasis-and-fatty-liver-detected-on-non-enhanced-ct-for-clinically-suspected-renal-colic
#15
Abdel-Rauf Zeina, Limor Goldenberg, Alicia Nachtigal, Rabea Hasadia, Walid Saliba
PURPOSE: To estimate a direct association between nephrolithiasis and hepatosteatosis in patients referred to CT due to clinical suspicion of renal colic. METHODS: A 508 non-contrast CT scans were examined for calculi in the kidneys or urinary tract, including measurements of liver attenuation, spleen attenuation, thickness of visceral and subcutaneous fat. Logistic regression examined the association of nephrolithiasis and hepatosteatosis findings. RESULTS: Nephrolithiasis was found in 421 (83...
March 16, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28321250/percutaneous-nephrolithotomy-under-ultrasound-guidance-in-patients-with-renal-calculi-and-autosomal-dominant-polycystic-kidney-disease-a-report-of-11-cases
#16
Xiao Wang, Xuecheng Yang, Xiulong Zhong, Zhenlin Wang, Senyao Xue, Weifeng Yu, Zhen Dong
Nephrolithiasis accelerates the renal failure in the patients with ADPKD. In order to evaluate the role of percutaneous nephrolithotomy in management of calculus in these patients, 11 patients with autosomal dominant polycystic kidney disease and renal stones were included in the study. Two patients had bilateral renal stones. All patients were treated by percutaneous nephrolithotomy under ultrasound guidance. 13 percutaneous nephrolithotomy procedures were performed in 1 stage by the urology team under ultrasound guidance...
2017: Advances in Urology
https://www.readbyqxmd.com/read/28303631/surgical-outcomes-of-percutaneous-nephrolithotomy-in-3402-patients-and-results-of-stone-analysis-in-1559-patients-from-a-single-centre-in-pakistan
#17
Syed Adibul Hasan Rizvi, Manzoor Hussain, Syed Hassan Askari, Altaf Hashmi, Murli Lal, Mirza Naqi Zafar
OBJECTIVE: To report our experience of a series of percutaneous nephrolithotomy (PCNL) procedures in a single centre over 18 years in terms of patient and stone characteristics, indications, stone clearance and complications, along with the results of chemical analysis of stones in a subgroup. PATIENTS AND METHODS: We retrospectively analysed the outcomes of PCNL in 3402 patients, who underwent the procedure between 1997 and 2014, obtained from a prospectively maintained database...
March 16, 2017: BJU International
https://www.readbyqxmd.com/read/28303335/treatment-selection-for-urolithiasis-percutaneous-nephrolithomy-ureteroscopy-shock-wave-lithotripsy-and-active-monitoring
#18
Mahesh Desai, Yinghao Sun, Noor Buchholz, Andrew Fuller, Tadashi Matsuda, Brian Matlaga, Nicole Miller, Damien Bolton, Mohammad Alomar, Arvind Ganpule
Urolithiasis is a significant worldwide source of morbidity, constituting a common urological disease that affects between 10 and 15% of the world population. Recent technological and surgical advances have replaced the need for open surgery with less invasive procedures. The factors which determine the indications for percutaneous nephrolithotomy include stone factors (stone size, stone composition, and stone location), patient factors (habitus and renal anomalies), and failure of other treatment modalities (ESWL and flexible ureteroscopy)...
March 16, 2017: World Journal of Urology
https://www.readbyqxmd.com/read/28301210/update-of-dual-energy-ct-applications-in-the-genitourinary-tract
#19
Ravi K Kaza, Lakshmi Ananthakrishnan, Avinash Kambadakone, Joel F Platt
OBJECTIVE: Dual-energy CT (DECT) is being increasingly used for abdominal imaging because it provides incremental benefit of material characterization without significant increase in radiation dose. This article provides an overview of current DECT techniques and use of DECT in urinary tract imaging for assessment of renal masses and urinary calculi characterization and in CT urography. CONCLUSION: Incorporation of DECT into clinical practice and use of its material characterization capabilities in urinary tract imaging enable characterization of urinary calculi and incidental renal lesions and can reduce radiation dose by allowing generation of virtual unenhanced images...
March 16, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28299446/do-renal-stones-that-fail-lithotripsy-require-treatment
#20
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...
March 15, 2017: Urolithiasis
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