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Ureter obstruction

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https://www.readbyqxmd.com/read/28637368/emergency-ureteral-stone-treatment-eust-score-predicts-outcomes-of-ureteroscopic-intervention-in-acute-obstructive-uropathy-secondary-to-urolithiasis
#1
Timothy Y Tran, Natalia Hernandez Bustos, Avinash Kambadakone, Brian H Eisner, Gyan Pareek
INTRODUCTION:  Immediate ureteroscopic treatment for patients presenting to the emergency room with symptomatic ureterolithiasis is more commonly being utilized. Recent reports demonstrate good efficacy for emergency URS, however preoperative predictors of treatment success have not been described. Here, we report our multi-center experience with emergency URS and identify predictors of successful treatment. We also describe the Emergency Ureteral Stone Treatment (EUST) Score, which integrates these predictors and stratifies patients into those that are likely and unlikely to have successful treatment...
June 22, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28623649/allium-stent-for-the-treatment-of-a-malignant-ureteral-stenosis-a-paradigmatic-case
#2
Marco Oderda, Sergio Lacquaniti, Giuseppe Fasolis
OBJECTIVE: The aim of this study was to present a paradigmatic case where the new-generation Allium URS stent was the optimal choice to treat a malignant ureteral stenosis. METHODS: We describe in detail all the steps of our surgery, performed on a 69-year-old patient with left hydronephrosis caused by lumbo-aortic nodal metastases compressing the ureter. The patient was intolerant to double-J stent due to strong irritative urinary symptoms. Allium URS stent was positioned under fluoroscopy in replacement of pre-existing double-J stent...
June 14, 2017: Urologia
https://www.readbyqxmd.com/read/28621602/resolution-of-nonurine-transudative-pleural-effusion-in-a-cat-after-removal-of-a-hydronephrotic-kidney
#3
Maura E Duffy, Andrew J Specht, Ahmira R Torres, May-Li Cuypers
CASE DESCRIPTION A 3-year-old spayed female Bengal cat was evaluated because of a history of bilateral pleural effusion and hydronephrosis of the right kidney. CLINICAL FINDINGS Cytologic analysis of a pleural fluid sample revealed characteristics of a pure transudate with a high percentage of lymphocytes. Results of fluid biochemical testing were not consistent with urine or chyle. Serum biochemical analysis and echocardiography yielded no evidence of hypoalbuminemia or high hydrostatic pressure secondary to cardiac disease...
July 1, 2017: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/28611171/pitfalls-of-the-duplex-system-the-mystery-of-the-missing-stone
#4
Donald Kudakwashe Nyanhongo, Satpal Antil, Syed Nasir
A duplex ureter constitutes about 1% of the renal tract anomalies.A 39-year-old man presented with a 4-week history of left loin pain and microscopic haematuria. Investigation with a non-contrast CT KUB revealed a 6 mm non-obstructing calculus in the left distal ureter.Left ureteroscopy and lithotripsy was planned. However, ureteroscopy failed to identify the calculus. A double J ureteric stent was left in situ and the procedure abandoned in favour of further assessment with a CT urogram. Imaging surprisingly showed a left duplex ureter with the calculus in the non-stented ureter...
June 13, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28597914/computed-tomographic-features-of-urinary-bladder-torsion-in-two-dogs
#5
M Ricciardi, A Campanella, R Martino
Urinary bladder torsion is rare in dogs. It is characterised by rotation of the organ along its longitudinal axis and is potentially life-threatening because of urinary flow obstruction with subsequent urine retention, hydroureter, hydronephrosis and azotaemia. This report describes the computed tomographic features of urinary bladder torsion in two dogs. In both cases, the hallmark indicative of torsion was the "whirl sign," originating from the twisted pelvic urethra and urinary bladder neck encircling the ureters, blood vessels and bladder ligaments in a characteristic spiral pattern...
June 9, 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/28595936/the-peak-site-of-stone-distribution-in-the-upper-ureter-is-unlikely-the-ureteropelvic-junction-ct-analysis-of-stone-lodging-site-with-respect-to-a-newly-identified-area-of-constriction
#6
Minobu Kamo, Taiki Nozaki, Jay Starkey, Saya Horiuchi, Natsuka Muraishi, Kazunori Hattori, Keiichi Akita
OBJECTIVES: To investigate the relationship between the upper urinary stone distribution and the "crossing point"; an area of relative fixation within the upper ureter at approximately the level where the ureter crosses the gonadal vein. METHODS: We reviewed 298 consecutive patients presenting with acute renal colic, identified upper ureteral stones in computed tomography. For stones located at "renal pelvis and upper ureter", we measured the vertebral level of each renal pelvis, crossing point, and stone...
June 5, 2017: Urology
https://www.readbyqxmd.com/read/28595935/predictors-of-renal-functional-improvement-after-pyeloplasty-in-ureteropelvic-junction-obstruction-clinical-value-of-visually-assessed-renal-tissue-tracer-transit-in-99m-tc-mercaptoacetyltriglycine-renography
#7
Sang Hoon Song, Sahyun Park, Sun Young Chae, Dae Hyuk Moon, Sungchan Park, Kun Suk Kim
OBJECTIVES: To determine the clinical value of visually assessed renal tissue transit time (TTT) in (99m)Tc-mercaptoacetyltriglycine ((99m)Tc-MAG3) renography for patients undergoing pyeloplasty METHODS: Medical records of 164 patients who underwent dismembered pyeloplasty were retrospectively reviewed. Baseline and postoperative renal ultrasonography and (99m)Tc-MAG3 renography were performed. Two urologists blinded to clinical data evaluated the renography and classified TTT as timely or delayed based on visualization of the tracer in the kidney pelvis between 2 and 10 min...
June 5, 2017: Urology
https://www.readbyqxmd.com/read/28585302/rictor-mtorc2-promotes-macrophage-activation-and-kidney-fibrosis
#8
Jiafa Ren, Jianzhong Li, Ye Feng, Bingyan Shu, Yuan Gui, Wei Wei, Weichun He, Junwei Yang, Chunsun Dai
Mammalian target of rapamycin (mTOR) signaling controls many essential cellular functions. However, the role for Rictor/mTORC2 in regulating macrophage activation and kidney fibrosis remains largely unknown. We report here that Rictor/mTORC2 was activated in macrophages from the fibrotic kidneys of mice. Ablation of Rictor in macrophages diminished kidney fibrosis, inflammatory cell accumulation, macrophage proliferation and polarization after unilateral ureter obstruction (UUO) or ischemia/reperfusion injury (IRI)...
June 6, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28580040/pseudo-prune-belly-syndrome-diagnosis-revealed-by-imaging-a-case-report-and-brief-review
#9
Hemal Grover, Sanjay Sethi, Jatin Garg, Amrit Pal Ahluwalia
BACKGROUND: Prune Belly Syndrome (PBS) is a rare entity, usually found in male neonates. It comprises complex urinary tract anomalies, bilateral undescended testis and absence of anterior abdominal wall muscles. Patients with unilateral abdominal wall deficiency, unilateral undescended testis and female neonates with abdominal wall laxity are classified as Pseudo Prune Belly syndrome (PPBS). Reports on PPBS do not highlight the radiological and imaging characteristics of this syndrome and the current literature on the role of newer imaging modalities, such as Magnetic Resonance Imaging (MRI), remains relatively sparse...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28570883/terminal-ileostomy-and-on-table-enteroscopy-a-case-report-describing-a-novel-approach-for-retrieval-of-foreign-bodies-in-the-difficult-abdomen
#10
Shadi Al-Bahri, Esther Cha, Gregory Burgoyne
INTRODUCTION: With any abdominal surgery in a difficult abdomen, the procedure is filled with potential hazards. In addition to a prolonged operative time, there is a risk of enterotomy or damage to blood vessels and ureters. An irradiated pelvis increases this risk and may cause additional morbidity such as delayed healing. An impacted foreign body can also be a challenging problem to deal with alone but when combined with a difficult abdomen can make the problem impossible. PRESENTATION OF CASE: A 67 year-old male presented with a small bowel obstruction secondary to a foreign body impacted in the distal...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28566415/a-rare-cause-of-anuria-in-a-case-of-pre-b-acute-lymphoblastic-leukaemia
#11
Siddhesh Arun Kalantri, Rahul Singla, Malay Kumar Bera, Maitreyee Bhattyacharyya
Renal failure in cases of acute lymphoblastic leukaemia during induction is mainly because of sepsis and tumour lysis syndrome. This 18-year-old man had sudden onset anuria with increase in creatine. At this time, patient did not have any overt signs or laboratory features suggestive of sepsis. Imaging studies documented bilateral hydronephrosis. Ureteroscopy was done, and it showed presence of soft tissue mass obstructing the ureter. On the the left side, it was noted in its middle part and on the right, at the ureteropelvic junction...
May 31, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28537409/-ureterointestinal-anastomosis-in-urinary-diversion-current-opinion
#12
J Doležel
Uretero-intestinal anastomosis (UIA) is one of the most critical points for the occurrence of severe complications of intestinal urinary diversion. Perfection of the current techniques and development of new UIA methods are motivated by the effort to reduce both early and late post-surgical complications. The necessity of using antireflux UIA, especially with an orthotopic neobladder, is controversial: according to some authors, antireflux UIA of any type generally increases, in comparison with reflux UIA, the risk of obstruction that endangers renal function more than the urine reflux itself...
2017: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/28536083/preoperatively-dilated-ureters-are-a-specific-risk-factor-for-the-development-of-ureteroenteric-strictures-after-open-radical-cystectomy-and-ileal-neobladder
#13
Richard E Hautmann, Robert de Petriconi, Andreas Kahlmeyer, Melanie Enders, Bjoern Volkmer
PURPOSE: To evaluate preoperative ureteral obstruction as risk factor for the development of benign UEAS in patients undergoing open RC and INB diversion. MATERIAL AND METHODS: 953 patients with bilateral ileoureterostomy, performed between 01/86 and 03/09, form the study population with a non-refluxing (Le Duc) technique in 357 and a refluxing (Wallace type) technique in 596 consecutive patients. We defined UEAS as need for specific therapy (e.g. stenting, dilatation, reimplantation) or proven loss of renal function...
May 20, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28508426/the-role-of-transvaginal-ultrasound-in-the-evaluation-of-ureteral-involvement-in-deep-endometriosis
#14
P Carfagna, C De Cicco Nardone, A De Cicco Nardone, A C Testa, G Scambia, R Marana, F De Cicco Nardone
OBJECTIVE: To assess whether routine visualization of the pelvic ureter during transvaginal ultrasonography should be performed in all patients with deep endometriosis candidate to surgery, in order to identify a potential silent ureteral involvement by the disease. METHODS: This was a prospective study of 200 consecutive patients undergoing surgery for deep endometriosis, evaluated between January 2012 and December 2014 at a tertiary endometriosis center at the Department of Obstetrics and Gynecology, Fondazione Policlinico Universitario A...
May 15, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28507324/a-novel-indole-compound-ma-35-attenuates-renal-fibrosis-by-inhibiting-both-tnf-%C3%AE-and-tgf-%C3%AE-1-pathways
#15
Hisato Shima, Kensuke Sasaki, Takehiro Suzuki, Chikahisa Mukawa, Ten Obara, Yuki Oba, Akihiro Matsuo, Takayasu Kobayashi, Eikan Mishima, Shun Watanabe, Yasutoshi Akiyama, Koichi Kikuchi, Tetsuro Matsuhashi, Yoshitsugu Oikawa, Fumika Nanto, Yukako Akiyama, Hsin-Jung Ho, Chitose Suzuki, Daisuke Saigusa, Atsushi Masamune, Yoshihisa Tomioka, Takao Masaki, Sadayoshi Ito, Ken-Ichiro Hayashi, Takaaki Abe
Renal fibrosis is closely related to chronic inflammation and is under the control of epigenetic regulations. Because the signaling of transforming growth factor-β1 (TGF-β1) and tumor necrosis factor-α (TNF-α) play key roles in progression of renal fibrosis, dual blockade of TGF-β1 and TNF-α is desired as its therapeutic approach. Here we screened small molecules showing anti-TNF-α activity in the compound library of indole derivatives. 11 out of 41 indole derivatives inhibited the TNF-α effect. Among them, Mitochonic Acid 35 (MA-35), 5-(3, 5-dimethoxybenzyloxy)-3-indoleacetic acid, showed the potent effect...
May 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28494578/early-and-late-ureteral-complications-after-renal-transplant-a-case-series-in-838-patients
#16
Francesca Manassero, Fabio Vistoli, Andrea Mogorovich, Maurizio DE Maria, Ugo Boggi, Cesare Selli
BACKGROUND: Ureteral strictures occur in approximately 3-8% of kidney transplant (KTx) recipients. They are usually a late event which needs surgical re-intervention with a subsequent increased risk of graft loss. This retrospective study presents a single-centre experience in managing ureteral complications using firstly a minimally invasive approach. METHODS: Between January 2000 and November 2012, 838 patients underwent KTx with Lich-Gregoire uretero-vesical anastomosis...
May 11, 2017: Minerva Urologica e Nefrologica, the Italian Journal of Urology and Nephrology
https://www.readbyqxmd.com/read/28479766/novel-technique-of-laparoscopic-extravesical-ureteric-reimplantation-in-primary-obstructive-megaureter
#17
Altaf Khan, Mujeebu Rahiman, Ashish Verma, Rahul Bhargava
OBJECTIVE: This study aims to demonstrate a novel laparoscopic technique of tapering megaureter without disrupting the blood supply and disconnecting the ureter. MATERIALS AND METHODS: Eight cases of primary obstructive megaureter in the age group of 14-22 years underwent laparoscopic extravesical ureteric reimplantation between August 2011 and July 2015 using our novel technique. Five patients had obstruction on left side and three on right side. Follow-up ultrasonography at 1 month and 3 months, voiding cystourethrogram (VCUG) at 3 months and intravenous urogram (IVU) at 6 months was obtained to assess the development of reflux and to look for adequate drainage of the obstructive ureter...
April 2017: Urology Annals
https://www.readbyqxmd.com/read/28476680/an-inguinal-approach-to-complex-extravesical-ureteral-reimplantation
#18
Adam S Howe, Lane S Palmer
OBJECTIVE: To report our experience in applying the Lich-Gregoir extravesical ureteral reimplantation (EVR) approach to complex cases (megaureter, duplex systems) through a small inguinal incision, with the goal of minimizing invasiveness. MATERIALS & METHODS: We reviewed the records of all patients who underwent common sheath and/or tapered EVR through an inguinal incision. Patient characteristics and reflux grade were obtained, and outcomes were assessed. The technique involved a 2 cm incision made in the lowest inguinal skin crease, standard cord exposure and lateral retraction, opening the floor of the canal to isolate the ureter...
May 2, 2017: Urology
https://www.readbyqxmd.com/read/28461998/detection-of-early-dj-stent-encrustation-by-sonographic-twinkling-artifacts-a-pilot-study
#19
Roman A Blaheta, Anton Oertl, Hans-Joachim Freisleben, Karen Nelson, Hanns Ackermann, Axel Haferkamp, Tobias Engl
INTRODUCTION: Ureter obstruction caused by a retro-peritoneal tumor is treated by inserting an indwelling ureter splint (DJ-stent). Indwelling duration is limited by cumulative crystalline deposits into the splint, eventually causing the repeated impairment of urine flow. Deciding when a DJ-stent must be replaced is important since belated removal can be accompanied by severe complications. X-ray or conventional sonography do not allow satisfactory evaluation of early incrustation, therefore, the use of sonographic twinkling artifacts (TA) to provide accurate stent surveillance was investigated...
2017: Central European Journal of Urology
https://www.readbyqxmd.com/read/28433070/effects-of-nicorandil-on-renal-function-and-histopathology-in-rats-with-partial-unilateral-ureteral-obstruction
#20
Hayrettin Ozturk, Tulin Firat, Buket Kin Tekce, Fahri Yilmaz, Hulya Ozturk
To evaluate the effects of nicorandil in a rat kidney model of partial unilateral ureteral obstruction (PUUO). Thirty male rats were randomly divided into three groups as follows: (1) Group 1 (Sham-control), ureters of the rats were manipulated but not ligated; (2) Group 2 (PUUO-untreated), PUUO was performed with two-thirds of the left ureter embedded in the psoas muscle; and (3) Group 3 (PUUO-nicorandil treated). After PUUO was established, nicorandil (15 mg/kg/day) was administered by gastric lavage for 21 days to determine its effects on PUUO-induced histopathological-, functional-, and oxidative stress-induced changes...
May 2017: Kaohsiung Journal of Medical Sciences
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