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Ureteral calculi

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https://www.readbyqxmd.com/read/28104422/tipless-nitinol-stone-baskets-comparison-of-penetration-force-radial-dilation-force-opening-dynamics-and-deflection
#1
Nishant Patel, Arash Akhavein, Bryan Hinck, Rajat Jain, Manoj Monga
OBJECTIVE: To evaluate 5 commercially available tipless nitinol baskets (2.2F) in 4performance factors: penetration force, radial dilation force, opening dynamics and deflection limitation. MATERIAL AND METHODS: The 2.2F Coloplast Dormia No-Tip®, 1.5F Sacred Heart Medical Halo®, 2.2F Cook NCircle Nitinol Tipless Stone Extractor ®, 1.9F Bard SkyLite Tipless Nitinol Basket® and the 1.9F Boston Scientific Zero TipTM baskets were tested for penetration force (safety metric), radial dilation force (functional metric for ureteral calculi), and opening/closing dynamics...
January 16, 2017: Urology
https://www.readbyqxmd.com/read/28073208/experience-of-percutaneous-access-under-ultrasound-guidance-in-renal-transplant-patients-with-allograft-lithiasis
#2
Silvano Palazzo, Ottavio Colamonico, Saverio Forte, Matteo Matera, Giuseppe Lucarelli, Pasquale Ditonno, Michele Battaglia, Pasquale Martino
OBJECTIVE: Urolithiasis of the transplanted kidney has an incidence of 0.2 to 1.7%, it increases the risk of infection in immunosuppressed patients and it can lead to ureteral obstruction that is often associated with deterioration of renal function. Urolithiasis of the transplanted kidney has different characteristics compared to the native kidney, due to the absence of innervation, which does not lead to colic pain. Percutaneous approach is an optimal choice in transplant patients. MATERIAL AND METHODS: Here we report our experience in two cadaveric transplant patients with urolithiasis...
December 30, 2016: Archivio Italiano di Urologia, Andrologia
https://www.readbyqxmd.com/read/28057987/factors-predicting-infectious-complications-following-percutaneous-nephrolithotomy
#3
Kuldeep Sharma, Satya Narayan Sankhwar, Apul Goel, Vishwajeet Singh, Pradeep Sharma, Yogesh Garg
OBJECTIVE: To determine the predictors of infectious complications following percutaneous nephrolithotomy (PCNL) in a prospective study. MATERIALS AND METHODS: A total of 332 patients with renal or upper ureteric calculi who underwent PCNL between January 2013 and June 2014 were included in the study. Infectious complications included febrile urinary tract infection and septicemia. The patients were divided into Group A and B depending on whether they developed or did not develop infectious complications...
October 2016: Urology Annals
https://www.readbyqxmd.com/read/28056942/the-guidewire-coil-technique-to-prevent-retrograde-stone-migration-of-ureteric-calculi-during-intracorporeal-lithothripsy
#4
Nici Markus Dreger, Friedrich Carl von Rundstedt, Stephan Roth, Alexander Sascha Brandt, Stephan Degener
BACKGROUND: Stone retropulsion represents a challenge for intracorporeal lithotripsy of ureteral calculi. The consequences are an increased duration and cost of surgery as well as decreased stone-free rates. The use of additional tools to prevent proximal stone migration entails further costs and risks for ureteral injuries. We present the simple technique of using a coil of the routinely used guidewire to prevent stone retropulsion. METHODS: We retrospectively evaluated all patients with mid-to-proximal ureteral stones in 2014, which were treated by ureteroscopic lithotripsy (Ho: YAG and/or pneumatic lithotripsy)...
January 5, 2017: BMC Urology
https://www.readbyqxmd.com/read/28052698/variation-coefficient-of-stone-density-a-novel-predictor-of-the-outcome-of-extracorporeal-shockwave-lithotripsy
#5
Shimpei Yamashita, Yasuo Kohjimoto, Takashi Iguchi, Satoshi Nishizawa, Akinori Iba, Kazuro Kikkawa, Isao Hara
OBJECTIVES: Although previous studies have indicated that stone heterogeneity can affect shock wave lithotripsy outcomes, there is no established measurement of stone heterogeneity on computed tomography imagery. We investigated whether variation coefficient of stone density can predict shock wave success. MATERIALS AND METHODS: We conducted a retrospective review of 245 patients with urinary calculi who had undergone shock wave lithotripsy. We compared the predictive powers of treatment success between variation coefficient of stone density and other parameters associated with computed tomography attenuation...
January 4, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28043312/ureteroscopy-for-management-of-ureteric-stones-in-children-a-single-centre-experience
#6
Nadeem Iqbal, Ijaz Hussain, Sehrish Waqar, Rizwana Sadaf, Ravale Tashfeen, Nur -Un- Nisa Nabil, Saeed Akhter
OBJECTIVE: To determine the outcomes of pediatric patients who underwent ureteroscopic removal of ureteric stones in terms of stone free rates and complications. STUDY DESIGN: Descriptive case series. PLACE AND DURATION OF STUDY: Urology Department at Shifa International Hospital, Islamabad, from January 2012 to December 2014. METHODOLOGY: A retrospective analysis of 37 patients, who underwent ureteroscopy for the treatment of ureteral calculi at the study centre, was conducted...
December 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/27994342/a-rare-case-of-unusually-large-lower-ureter-calculus
#7
Santosh Kumar Tiwari, Lipi Sharma
We report an unusual large and "s" shaped left lower ureteric calculus which has been never reported in any manuscript to the best of our knowledge. Calculus in genitourinary happen to occur in various shapes and sizes; here we report unusual shaped calculi.
October 2016: Indian Journal of Surgery
https://www.readbyqxmd.com/read/27967216/randomized-study-of-ureteral-catheter-vs-double-j-stent-in-tubeless-minimally-invasive-percutaneous-nephrolithotomy-patients
#8
Yizhou Zhou, Jianguo Zhu, Alberto Gurioli, Dongbo Yuan, Jiawei Luo, Zhilin Li, Wei Zhang, Shiwei Xiao, Yongda Liu
OBJECTIVE: To prospectively analyze and compare the outcomes of using externalized ureteral catheter (EUC) vs Double-J ureteral stent (DJ) in tubeless minimally invasive percutaneous nephrolithotomy (MPCNL). PATIENTS AND METHODS: A total of 109 patients underwent tubeless MPCNL in our institute and have been enrolled into this study. Fifty-six and 53 patients had EUC and DJ positioning at the conclusion of the procedure, respectively. The two approaches have been compared for operative time, intraoperative blood loss, postoperative visual analogue pain scale (VAS) score, analgesic requirement, stent-related symptoms, hospital stay, degree of vesicoureteral reflux (VUR) on the operative side, and complications according to the modified Clavien system...
January 12, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/27960541/high-frequency-dusting-versus-conventional-holmium-laser-lithotripsy-for-intrarenal-and-ureteral-calculi
#9
Roger Li, David Ruckle, Mohamed Keheila, Jonathan Maldonado, Michelle Lightfoot, Muhannad Alsyouf, Alexander Yeo, Samuel R Abourbih, Gaudencio Olgin, Javier L Arenas, D Duane Baldwin
INTRODUCTION: The efficiency of holmium laser lithotripsy for urolithiasis depends upon several factors, including laser pulse energy and frequency and stone composition and retropulsion. This study investigates the complex interplay between these factors and quantifies lithotripsy efficiency using different laser settings in a benchtop kidney and ureter model. MATERIALS AND METHODS: In vitro caliceal and ex vivo porcine ureteral models were constructed. Calcium oxalate monohydrate stones were fragmented using a 200-μm laser fiber...
January 16, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/27930563/combining-ultrasonography-and-noncontrast-helical-computerized-tomography-to-evaluate-holmium-laser-lithotripsy
#10
Jia Mi, Jie Li, Qinglu Zhang, Xing Wang, Hongyu Liu, Yanlu Cao, Xiaoyan Liu, Xiao Sun, Mengmeng Shang, Qing Liu
The purpose of the study was to establish a mathematical model for correlating the combination of ultrasonography and noncontrast helical computerized tomography (NCHCT) with the total energy of Holmium laser lithotripsy.In this study, from March 2013 to February 2014, 180 patients with single urinary calculus were examined using ultrasonography and NCHCT before Holmium laser lithotripsy. The calculus location and size, acoustic shadowing (AS) level, twinkling artifact intensity (TAI), and CT value were all documented...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27920987/spontaneous-perforation-of-the-upj-a-case-report-and-review-of-the-literature
#11
K Searvance, J Jackson, N Schenkman
Spontaneous rupture of the ureter is an uncommon condition defined by non-traumatic extravasation of urine. Causative factors leading to rupture include urinary calculi, malignancies, instrumentation or trauma. Ureteral rupture can lead to numerous complications, including abscess formation, urinomas, and urosepsis. Minimal literature is available regarding spontaneous ureteral perforation, especially at the ureteropelvic junction. We present a rare case of spontaneous perforation of the ureter at the ureteropelvic junction caused by an undiagnosed non-compliant bladder...
January 2017: Urology Case Reports
https://www.readbyqxmd.com/read/27917808/unenhanced-computed-tomography-findings-of-renal-papillae-in-patients-with-a-ureteral-stone
#12
Selim Serter, Erkan Sahin, Utku Mahir Yildirim, Murat Arslan, Ayhan Karakose
PURPOSE: In some patients with a ureteral stone without uretero-hydronephrosis, it is difficult to determine the location of the stone. The objective of the present study was to investigate the changes in renal papillae using unenhanced computerized tomography (uCT) and determine the side of calculi using the renal papillary findings in patients with a ureteral stone. METHODS: uCT data from 81 patients were retrospectively reviewed for this study. The inclusion criteria were unilateral ureteral calculi, no renal calculi and no hydronephrosis...
December 1, 2016: Clinical and Investigative Medicine. Médecine Clinique et Experimentale
https://www.readbyqxmd.com/read/27917317/flexible-ureteroscopy-for-renal-stone-without-preoperative-ureteral-stenting-shows-good-prognosis
#13
Jiaqiao Zhang, Chuou Xu, Deng He, Yuchao Lu, Henglong Hu, Baolong Qin, Yufeng Wang, Qing Wang, Cong Li, Shaogang Wang, Jihong Liu
PURPOSE: To clarify the outcome of flexible ureteroscopy (fURS) for management of renal calculi without preoperative stenting. METHODS: A total of 171 patients who received 176 fURS procedures for unilateral renal stones were reviewed. All procedures were divided into two groups depending on whether they received ureteral stenting preoperatively. Baseline characteristics of patients, stone burden, operation time, stone-free rates, and complications were compared between both groups...
2016: PeerJ
https://www.readbyqxmd.com/read/27912973/micro-ureteroscopy-for-the-treatment-of-distal-ureteral-calculi-in-children
#14
Mehmet Mazhar Utanğaç, Ahmet Ali Sancaktutar, Abdulkadir Tepeler
OBJECTIVE: The objective of this study was to demonstrate the efficacy and safety of micro-ureteroscopy (micro-URS) in the management of distal ureteral stones in the pediatric population. MATERIALS AND METHODS: A total of 11 children, who had undergone micro-URS between September 2015 and April 2016 with the indication of distal ureteral calculi in two referral centers, were retrospectively evaluated. The procedures were performed with the patient in the lithotomy position under general anesthesia using the standard URS technique with a micro-ureteroscope that has a caliber of 4...
November 17, 2016: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/27911457/what-is-the-impact-of-extracorporeal-shock-wave-lithotripsy-on-semen-parameters-a-systematic-review-and-meta-analysis
#15
Mohammad H Radfar, Nasser Simforoosh, Mehdi Sotoudeh, Mehdi H Ramezani, Mohammad J Mollakoochakian, Maryam Nikravesh, Hamidreza Shemshaki
BACKGROUND: Extracorporeal shock wave lithotripsy (ESWL) is an important tool for the management of urolithiasis. The effects of shockwaves on tissues are established. The aim of this meta-analysis is to evaluate the microscopic semen characteristics of young men before and after ESWL treatment for lower ureteral calculi. METHODS: Literature searches were performed following the Cochrane guidelines. We conducted a systematic review and meta-analysis that included six trials that investigated the effects of ESWL on semen parameters, including sperm concentration, motility, and hematospermia...
December 2, 2016: Urologia
https://www.readbyqxmd.com/read/27900939/incidence-and-implications-of-silent-hydronephrosis-following-percutaneous-nephrolithotomy%C3%A2
#16
Lawrence Dagrosa, Rachel Moses, Vernon M Pais
OBJECTIVE: While routine renal imaging following ureteroscopy for urinary calculi has been recommended to screen for asymptomatic "silent" obstruction, the rate of silent obstruction following percutaneous nephrolithotomy (PCNL) remains poorly defined, and no consensus recommendations exist on routine postoperative imaging. At our institution, we sought to assess the incidence of silent hydronephrosis (SH), as a screen for obstruction, following PCNL. METHODS: The records of all 162 patients who met study inclusion criteria were reviewed...
January 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/27868099/endourologic-and-open-ureterolithotomy-and-common-sheath-reimplant-for-large-bladder-and-distal-ureteral-calculi
#17
Madeline Cancian, Joseph Brito, Joseph Renzulli, Gyan Pareek
A twenty-eight-year-old female with a history of suprapubic pain and recurrent urinary tract infections presents for urology referral with a kidney, ureter, and bladder radiograph showing a 4.4 cm bladder calculus and 6.5 cm distal left ureteral stone. She underwent effective cystolitholapaxy of the bladder stone. Endourologic attempt (left ureteroscopy) was unsuccessful because of ureteral stone burden. Findings at ureteroscopy revealed a duplicated system on the left with the lower pole moiety joining just proximal to the ureteral orifice...
2016: Journal of Endourology Case Reports
https://www.readbyqxmd.com/read/27859390/stone-tissue-differentiation-for-holmium-laser-lithotripsy-using-autofluorescence-clinical-proof-of-concept-study
#18
Birgit Lange, Dieter Jocham, Ralf Brinkmann, Jens Cordes
BACKGROUND AND OBJECTIVES: Holmium laser lithotripsy is the gold standard for intracorporeal fragmentation of urinary calculi. Usually, a visible beam is superimposed on the IR treatment laser as an aiming beam to guide the surgeon. In vitro tests showed that this aiming beam (532 nm, power <1 mW) excites strong fluorescence on human calculi. Tissue, in contrast, emitted much weaker fluorescence. If this is verified in vivo, the fluorescence signal induced by the aiming beam could be used to implement a feedback loop, preventing the Holmium laser being fired on tissue...
November 12, 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27846839/combination-therapy-only-shows-short-term-superiority-over-monotherapy-on-ureteral-stent-related-symptoms-outcome-from-a-randomized-controlled-trial
#19
Qinyu Liu, Banghua Liao, Ruochen Zhang, Tao Jin, Liang Zhou, Deyi Luo, Jiaming Liu, Hong Li, Kunjie Wang
BACKGROUND: Controversy remains on the superiority of combination therapy over monotherapy on ureteral stent-related symptoms (SRSs). We tend to explore if there is a necessity of combination therapy. METHODS: One hundred cases of unilateral upper urinary tract calculi with stent insertion (pre and post flexible ureteroscopy) were randomized into 4 groups, given non-treatment, solifenacin, tamsulosin or combination respectively. Eight times of follow-ups were given after each insertion...
November 15, 2016: BMC Urology
https://www.readbyqxmd.com/read/27845548/safety-and-efficacy-of-pneumatic-lithotripters-versus-holmium-laser-on-multiple-ureteral-calculi
#20
Hakan Ercil, Ergun Alma, Okan Bas, Umut Unal, Nevzat Can Sener, Ediz Vuruskan, Aykut Buğra Senturk, Zafer Gokhan Gurbuz
BACKGROUND: Different energy sources can be used for ureteroscopic stone fragmentation, such as pneumatic, ultrasonic, laser or electrohydraulic. The aim of this study was to compare the efficacy and safety of pneumatic lithotripters versus Ho: YAG laser in the treatment of multiple stones in the distal ureter. METHODS: A retrospective evaluation was done using the data of patients to whom ureteroscopic lithotripsy (URL) was applied for ureter stones in our clinic...
November 2016: Archives of Iranian Medicine
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