Pedículo Renal: Análisis de sus Variantes / Renal Pedicle: Analysis of their Variants

Testut & Latarjet (1980), Bouchet & Cuilleret (1986), Latarjet & Liard (2005) y Rouvière & Delmas (2005) describen las relaciones intrínsecas del pedículo renal (PR) a partir de dos planos coronales, siendo la PER el elemento que limita entre ambos. Trivedi et al. (2011) demostró relaciones entre los elementos del PR que no coinciden con las descripciones aportadas por dichos autores.Conocer las posibles variantes en las relaciones intrínsecas del PR es de suma importancia en prácticas quirúrgicas como el trasplante renal (García de Jalón Martínez et al., 2003; Batista Hernández et al., 2010). Por lo tanto, el objetivo del presente trabajo fue analizar las variables relaciones entre los elementos que conforman el PR en la región yuxtahiliar del riñón. Se estudiaron 23 PR, formolizados al 10 % y provistos por el Equipo de Disección de la Segunda Cátedra de Anatomía de la Universidad de Buenos Aires. Se clasificaron los PR en dos grupos. En el Grupo I, las afluentes de origen de la vena renal (AOVR) se hallaban en el mismo plano coronal. En el grupo II, las AOVR se encontraban en diferentes planos coronales. Cada grupo fue subdividido en distintos patrones. Los patrones I y II, de mayor incidencia, fueron asociados al grupo I y los patrones III, IV y V al grupo II. En el patrón I, las AOVR eran anteriores a la pelvis renal (PER) y posteriores a la arteria prepiélica (APP). En el patrón II, las AOVR eran anteriores a la PER y a la APP. Los patrones I y II conforman el grupo I y presentaron mayor número de incidencia en nuestra investigación. Existen también variantes que inciden con menor frecuencia que dichos patrones, estas comprenden el grupo II de la clasificación planteada en el presente trabajo.

SUMMARY: Testut & Latarjet (1980), Bouchet & Cuilleret (1986), Latarjet & Liard (2005) y Rouvière & Delmas (2005) describe the intrinsic relationships of the renal pedicle (PR) from two coronal planes, the renal pelvis (PER) being the element that limits between both. Trivedi et al. (2011) showed relationships between the elements of the RP that do not coincide with the descriptions provided by these authors. Knowing the possible variants in the intrinsic relationships of the RP is of the utmost importance in surgical practices such as renal transplantation (García de Jalón Martínez et al., 2003). Therefore, the objective of this study is to analyze the variable relationships between the elements that make up the RP in the juxtahilar region of the kidney. 23 RP were studied, formalized at 10 % and provided by the Dissection Team of the Second Chair of Anatomy of the University of Buenos Aires. PRs were classified into two groups. In Group I, the tributaries of origin of the renal vein (RVOA) were in the same coronal plane. In group II, the AOVRs were in different coronal planes. Each group was subdivided into different patterns. Patterns I and II, with the highest incidence, were associated with group I and patterns III, IV and V with group II. In pattern I, the VROA were anterior to the renal pelvis (PER) and posterior to the prepelvic artery (PPA). In pattern II, AOVRs were prior to PER and APP. Patterns I and II make up group I and presented a higher number of incidence in our investigation. There are also variants that occur less frequently than these patterns, these comprise group II of the classification proposed in this work.

Nefroureterectomía radical lumboscópica con rodete vesical endoscópico, en cáncer urotelial de tracto urinario superior / Lumboscopic radical nephroureterectomy with endoscopic bladder cuff excision in an upper urinary tract urothelial tumor

Los carcinomas uroteliales son el 4to tumor más común. Pueden ubicarse en el tracto urinario inferior (vejiga y uretra) o en el tracto urinario superior (cavidades renales, pelvis renal y uréter). Presentamos una serie de 3 casos, con cuadro de hematuria macroscópica, documentando tumores uroteliales, realizándose en estos casos un abordaje lumboscópico de riñón y una resección endoscópica del rodete vesical. Se realiza nefroureterectomía lumboscópica con resección de rodete vesical endoscópica transuretral. Los 3 pacientes fueron egresados al segundo día posquirúrgico sin complicaciones y en los tres casos el rodete vesical sin evidencia de actividad tumoral, y actualmente en vigilancia con excelente resultados oncológicos. La nefroureterectomía lumboscópica con resección endoscópica del rodete vesical es una técnica reproducible en manos experimentadas, con iguales resultados oncológicos que el abordaje abierto.

Urothelial carcinomas are the 4th most common tumor. They can be located in the lower urinary tract (bladder and urethra) or in the upper urinary tract (renal cavities, renal pelvis, and ureter). We present a series of 3 cases, with a picture of macroscopic hematuria, documenting urothelial tumors, performing in these cases a lumboscopic approach to the kidney and an endoscopic resection of the bladder rim. Lumboscopic nephroureterectomy was performed with transurethral endoscopic bladder rump resection. The 3 patients were discharged on the second postoperative day without complications and in the three cases the bladder rim without evidence of tumor activity, and currently under surveillance with excellent oncological results. Lumboscopic nephroureterectomy with endoscopic resection of the bladder rim is a reproducible technique in experienced hands, with the same oncological results as the open approach.

Clinical and radiographic outcomes following salvage intervention for ureteropelvic junction obstruction

ABSTRACT Purpose: We aimed to assess failure rates of salvage interventions and changes in split kidney function (SKF) following failed primary repair of ureteropelvic junction obstruction (UPJO). Materials and Methods: A retrospective review of adult patients at an academic medical center who underwent salvage intervention following primary treatment for UPJO was performed. Symptomatic failure was defined as significant flank pain. Radiographic failure was defined as no improvement in drainage or a decrease in SKF by ≥7%. Overall failure, the primary outcome, was defined as symptomatic failure, radiographic failure, or both. Results: Between 2008-2017, 34 patients (median age 38 years, 50% men) met study criteria. UPJO management was primary pyeloplasty/secondary endopyelotomy for 21/34 (62%), primary pyeloplasty/secondary pyeloplasty for 6/34 (18%), and primary endopyelotomy/secondary pyeloplasty for 7/34 (21%). Median follow-up was 3.3 years following secondary intervention. Patients undergoing primary pyeloplasty/secondary endopyelotomy had significantly higher overall failure than those undergoing primary pyeloplasty/secondary pyeloplasty (16/21 [76%] vs. 1/6 [17%], p=0.015). Among patients undergoing secondary endopyelotomy, presence of a stricture on retrograde pyelogram, stricture length, and SKF were not associated with symptomatic, radiographic, or overall failure. Serial renography was performed for 28/34 (82%) patients and 2/28 (7%) had a significant decline in SKF. Conclusions: Following failed primary pyeloplasty, secondary endopyelotomy had a greater overall failure rate than secondary pyeloplasty. No radiographic features assessed were associated with secondary endopyelotomy failure. Secondary intervention overall failure rates were higher than reported in the literature. Unique to this study, serial renography demonstrated that significant functional loss was overall infrequent.

How I do it open distal ureteroureterostomy for ectopic ureters in infants with duplex systems and no vesicoureteral reflux under 6 months of age

ABSTRACT We describe a step by step technique for open distal ureteroureterostomy (UU) in infants less than 6 months presenting with duplex collecting system and upper pole ectopic ureter in the absence of vesicoureteral reflux (VUR).

Villous adenoma of the renal pelvis: a common entity at an uncommon location

Villous adenoma is uncommonly seen in the urogenital tract and is even more rarely seen in the upper urinary tract and renal pelvis. Like colorectal adenomas, these neoplasms can transform into adenocarcinoma. The preoperative diagnosis is challenging due to their frequent association with hydronephrosis. Herein, we present the case of a villous adenoma of the renal pelvis in a 62-year-old man presenting with recurrent urinary tract infection. The computed tomography scan showed marked hydronephrosis but no suspicious mass in the right kidney. A laparoscopic right nephrectomy was performed. Gross examination revealed a dilated renal pelvis with an irregular exophytic lesion in the renal pelvis's upper surface. The histopathological examination showed slender, elongated villi with thin fibrovascular cores, consistent with villous adenoma morphology. Isolated villous adenomas have a favorable prognosis. However, the pathologist should undertake a search for an invasive component.

The outcomes of mini-laparoscopic pyeloplasty in children - brazilian experience

ABSTRACT Objetive Pelvicureteric junction (PUJ) obstruction is the main cause of hydronephrosis in childhood. Open pyeloplasty has been the gold standard treatment of this condition with success rate above 90%. The role of laparoscopic pyeloplasty (LP) in children is less well defined and has slowly emerged as an alternative procedure. We report outcomes of our initial experience with LP in 38 children from 2 months of age. Materials and Methods From June 2015 to December 2017 38 children aged 2-60 months (mean age 1.7 years) underwent LP for correction of PUJ obstruction. The mean pre operative anteroposterior diameter of the renal pelvis (APD) was 43,5mm and all patients had hydronephrosis (APD 21.4-76 mm) and obstructed curve on diuretic renogram. Anderson-Hynes pyeloplasty was the performed technique. Results are reported. Results Mean operative time was 107 minutes (70-180) with no conversion to open procedure. Pain control was needed mainly in the first 12hs. Mean hospitalization was 2 days (1-5). There were complications in 5 children not affecting the final outcome. Two patients had a re-obstruction requiring a second procedure with good result. The mean follow up was 18 months (13-36). The mean reduction on the postoperative APD was 41% - p<0,001 (end APD 5 to 41mm). Overall success rate was 94,7%. All children had good cosmetic results. Conclusions This is a small series limited by short follow up, however its data suggest that LP has good functional and cosmetic results, not compromising the success of the open procedure, regardless patient age.

Advance in re-do pyeloplasty for the management of recurrent ureteropelvic junction obstruction after surgery / 北京大学学报(医学版)

Ureteropelvic junction obstruction (UPJO) is characterized by decreased flow of urine down the ureter and increased fluid pressure inside the kidney. Open pyeloplasty had been regarded as the standard management of UPJO for a long time. Laparoscopic pyeloplasty reports high success rates, for both retroperitoneal and transperitoneal approaches, which are comparable to those of open pyeloplasty. However, open and laparoscopic pyeloplasty have yielded disappointing failure rates of 2.5%-10%. The main causes for recurrent UPJO are severe peripelvic and periureteric fibrosis due to urinary extravasation, ureteral ischemia, and inadequate hemostasis. In addition, failing to diagnose lower pole crossing vessels before or during the primary procedure is also responsible for recurrent UPJO. In addition, poor preoperative split renal function, hydronephrosis, presence of renal stones, patient age, diabetes, prior endopyelotomy history, and retrograde pyelography history were considered as predictors of pyeloplasty failure. The failure is usually defined by persistent pain, persistent radiographic obstruction (infection or stones), continued decline in split renal function, or a combination of the above. And the failure of pye-loplasty often occurs in the first 2 years after the surgery. The available options for managing recurrent UPJO with a salvageable renal unit include endopyelotomy, re-do pyeloplasty, stent implantation, percutaneous nephrostomy, ureterocalicostomy, and nephrectomy. Re-do pyeloplasty has such merits as high successful rates and rare complications, compared with endopyelotomy or ureterocalicostomy. And some investigators think that re-do pyeloplasty should be regarded as the gold standard for secondary therapy if feasible. Open pyeloplasty can enlarge the operating field, facilitate the exposure of the ureteropelvic junction, reduce the difficulty of operation, and thus reduce the occurrence of complications. There are no significant differences among the success rates of re-do pyeloplasty under open approach, traditional laparoscopy and robot-assisted laparoscopy, according to previous reports. However, traditional laparoscopic and robot-assisted pyeloplasty give advantages of cosmetology, small trauma, less postoperative pain, speedy recovery and shorter hospitalization, fewer complications and lower recurrent rates. If the primary pyeloplasty is an open operation in retroperitoneal approach, the traditional laparoscopic and robotic operation with retroperitoneal approach should be considered for secondary repair. The cause of recurrent UPJO should be evaluated before surgery and identified intraoperatively to minimize the possibility of recurrence.

Application of preoperative three-dimensional image reconstruction in the treatment of ureteropelvic junction obstruction / 北京大学学报(医学版)

OBJECTIVE@#To investigate the value of preoperative three-dimensional image reconstruction in the treatment of ureteropelvic junction obstruction (UPJO).@*METHODS@#We reviewed data on 40 patients (22 male cases, and 18 female cases) diagnosed with UPJO in Peking University First Hospital from May 2017 to April 2019. The median age was 26.5 years (IQR 23.25-38.75) years. There were 11 patients complicated with ectopic vessels, 14 patients with kidney stones, 3 patients with horseshoe kidney, and 6 patients with obstruction after pyeloplasty. All the patients underwent preoperative enhanced CT scan, and the CT data were reconstructed into three-dimensional image models. The obstruction position of ureteropelvic junction and the relationship between ureteropelvic junction and blood vessels and organs were observed by three-dimensional models to assist planning surgery. Thirty-seven patients underwent laparoscopic pyeloplasty (including 3 cases combined with pyelolithotomy with flexible cystoscope, 1 case combined with pyelolithotomy by sun-style cystoscope, 1 case with laparoscopic ureter resection and anastomosis, 3 cases of laparoscopic pyeloplasty of horseshoe kidney), 2 patients underwent laparoscopic ventral onlay lingual mucosal graft ureteroplasty, and 1 patient underwent robot-assisted laparoscopic pyeloplasty.@*RESULTS@#Three-dimensional CT image clearly showed the relationship between the obstruction of ureteropelvic junction and blood vessels and organs after three-dimensional reconstruction. The type, diameter, position and direction of the ectopic vessels could be observed clearly before operation according to the three-dimensional reconstruction model, and the number, size, location and shape of renal calculi or other masses, the number of involved renal calyces and the anatomical distribution in the renal pelvis and calyces could be also evaluated preoperatively. After comprehensive analysis of the above information, individualized operation plans were performed on the patients, all the 40 cases were successfully completed with the surgery without any transfer to open surgery. The average operative time was (129.91±37.90) min (range: 75 to 273), the average blood loss was (48.1±78.0) mL (range: 10 to 400), the average hospitality was (5.04±1.99) d (range: 2 to 10), and the average postoperative drainage time was (3.8±1.4) d (range: 2 to 8).@*CONCLUSION@#The preoperative three-dimensional image reconstruction has a high clinical value in the treatment of ureteropelvic junction obstruction, and it is of great help to assist surgery planning and is worthy of further clinical promotion and application.

Simulated training model of ureteropyelic anastomosis in laparoscopic pyeloplasty

Abstract Purpose: To develop a model for simulated training of ureteropyelic anastomosis in laparoscopicpyeloplasty. Methods: Longitudinal and experimental study, with 16 participants. A synthetic instrument was produced to simulate the renal pelvis and the proximal portion of the ureter positioned on a platform within laparoscopic simulators, thereby resulting in the realistic simulation of the ureteropelvic anastomosis. A step-by-step guide was also developed for the accomplishment of the ureteropelvic anastomosis training model. Results: In the evaluation of all participants' suture training, a decrease was found in the time needed to perform the anastomosis, with a median of 17.83 min in the 1st step and 14.21 min in the last one (p = 0.01). Regarding the knots, in the 1st step, 5% of them were considered firm, with an evolution to 30% in the last step (p = 0.011). Conclusion: We noticed improvement in the ability to perform the ureteropelvic anastomosis by participants with no experience with it. Therefore, even unexperienced participants can improve their skills with this training. Moreover, we observed the effectiveness of the model use, confirmed by the participants' opinion and its validation by expert surgeons.

Comparison of the outcomes of laparoscopic pyeloplasty with and without concomitant pyelolithotomy

ABSTRACT Objective We aimed to evaluate the results of laparoscopic pyeloplasty with concomitant pyelolithotomy and compare results with a cohort of patients undergoing laparoscopic pyeloplasty without pyelolithotomy. Materials and Methods We retrospectively reviewed records of 43 patients undergoing transperitoneal laparoscopic Anderson-Hynes dismembered pyeloplasty between December 2012 and July 2018 at our department. Eighteen patients (42%) underwent laparoscopic pyeloplasty with concomitant pyelolithotomy. The results of patients with renal stones were compared with 25 matched patients undergoing laparoscopic pyeloplasty without concomitant renal stones. Demographic data, operative and stone parameters were compared between the groups. Results The groups were similar regarding to demographic characteristics. All operations were completed laparoscopically with no conversions to open surgery. In 3 cases without renal stones and 15 cases with renal stones, transposition of the ureter due to crossing vessels was performed. The mean stone size was 13±5.24 mm, and the median number of stones was 1 (1-18). The success of laparoscopic pyeloplasty with and without pyelolithotomy was 93.3% and 92.9%, respectively, as confirmed by negative diuretic renogram at postoperative 3rd months. Overall stone-free rate after laparoscopic pyelolithotomy was 93.3%. Mean operative time was 222.6765.71 minutes vs. 219.11±75.63 minutes for the pyeloplasty with concomitant pyelolithotomy vs. pyeloplasty, respectively (p=0.88). Conclusions Laparoscopic pyeloplasty with concomitant pyelolithotomy is a safe and effective intervention with associated good cosmetic results and high stone-free rates without significant increase in operative time or complications.

Comparison of supine and prone miniaturized percutaneous nephrolithotomy in the treatment of lower pole, middle pole and renal pelvic stones: A matched pair analysis

ABSTRACT Purpose We aimed to compare the outcomes of supine and prone miniaturized percutaneous nephrolithotomy (m-PNL) in the treatment of lower pole, middle pole and renal pelvic stones. Materials and Methods 54 patients who performed supine m-PNL between January 2017 and March 2018 and 498 patients who performed prone m-PNL between April 2015 and January 2018 were included in the study. Of the 498 patients, 108 matching 1: 2 in terms of age, gender, body mass index, American Association of Anesthesiology score, stone size, stone localization and hydronephrosis according to the supine m-PNL group were selected as prone m-PNL group. The patients with solitary kidney, upper pole stone, urinary system anomaly or skeletal malformation and pediatric patients (<18 years old) were excluded from the study. The success was defined as 'complete stone clearance' and was determined according to the 1st month computed tomography. Results The operation time and fluoroscopy time in supine m-PNL was significantly shorter than prone m-PNL group (58.1±45.9 vs. 80.1±40.0 min and 3.0±1.7 min vs. 4.9±4.5 min, p=0.025 and p=0.01, respectively). When post-operative complications were compared according to the modified Clavien-Dindo classification, overall and subgroup complication rates were comparable between groups. There was no significant difference between the groups in terms of the success rates (supine m-PNL; 72.2%, prone m-PNL; 71.3%, p=0.902). Conclusions Supine m-PNL procedure is more advantageous in terms of operation time and fluoroscopy time in the treatment of lower pole, middle pole and renal pelvic stones.

Balloon dilation for failed pyeloplasty in children?

ABSTRACT Objective: Pyeloplasty is considered the gold standard treatment for ureteropelvic junction obstruction (UPJO). However, the failure rate of pyeloplasty is as high as 10% and repeat pyeloplasty is more difficult. This study aimed to evaluate the efficacy of balloon dilatation for failed pyeloplasty in children. Materials and Methods: Between 2011 and 2017, 15 patients, aged 6 months to 14 years, were treated with balloon dilation for restenosis of UPJO after a failed pyeloplasty. Ultrasound and intravenous urography were used to evaluate the primary outcome. Success was defined as the relief of symptoms and improvement of hydronephrosis, which was identified by ultrasound at the last follow-up. Results: All patients successfully completed the operation, 13 patients by retrograde approach and 2 patients by antegrade approach. Thirteen patients were followed for a median of 15 (4 to 57) months and 2 patients were lost to follow-up. Resolution of the hydronephrosis was observed in 5 cases. The anteroposterior diameter (APD) of the pelvis decreased by an average of 12.4 ± 14.4mm. Eight patients needed another surgery. The average postoperative hospital stay was 1.78 ± 1.4 days. Two patients experienced fever after balloon dilation. No other complications were found. Conclusions: Balloon dilatation surgery is safe for children, but it is not recommended for failed pyeloplasty in that group of patients, owing to the low success rate.

Treatment of crossing vessels in laparoscopic pyeloplasty / 北京大学学报(医学版)

OBJECTIVE@#To investigate the management of crossing vessels compression in laparoscopic pyeloplasty.@*METHODS@#From January 2016 to June 2018, a total of 21 patients who were admitted to Peking University People's Hospital with ureteropelvic junction obstruction (UPJO) associated with crossing vascular compression were reviewed. There were 15 males and 6 females who formed this group, with a mean age of (33.9±15.0) years. There were 4 cases of mild hydronephrosis, 12 cases of moderate hydronephrosis and 5 cases of severe hydronephrosis before operation. All the patients underwent laparoscopic pyeloplasty in our hospital, including 13 on the left and 8 on the right. Laparoscopic pyeloplasty (Anderson-Hynes) were performed in all the patients. Hem-o-lok suspension (14 cases in the suspension group) or translocation of the crossing vessels (7 cases in the translocation group) were used for the intraoperative management of the crossing vessels. Double J tubes were removed 8 weeks postoperatively. The patient demographic data were collected (including operation time, treatment time of crossing vessels, intraoperative blood loss, time of drainage tube removal after operation, and average length of hospital stay), postoperative outcomes were evaluated and the patients were followed up regularly.@*RESULTS@#In all the patients, the crossing vessels were successfully reserved, and none of them were ligated intra-operatively. Mean operative times were (202.2±57.0) min. The duration of intraoperative treatment of crossing vessels was (10.5±3.2) min, (6.1±2.0) min in the suspension group, and (13.7±5.2) min in the translocation group, respectively. Intraoperative blood loss was (47.8±25.6) mL, postoperative drainage time was (4.8±2.6) d, and length of hospital stay was (11.5±3.3) d. Postoperative slight urinary leakage occurred in 1 case. Preoperative pyelectasis of the affected side of all the patients was (3.4±1.7) cm, compared with postoperative pyelectasis of (1.9±1.3) cm. The difference was statistically significant (P<0.05). Postoperative follow-up of all the patients was carried out until December 2018. There was no significant difference in kidney size in all the patients before or after the operations, and hydronephrosis was alleviated compared with that before surgery.@*CONCLUSION@#For UPJO patients with crossing vascular compression, according to the location of the crossing vessels, Hem-o-lok suspension or vessel transposition can be adopted to relieve the crossing vascular compression and improve the success rate of the surgery.

Fetal anteroposterior renal pelvic diameter for predicting antenatal hydronephrosis requiring postnatal surgery / 浙江大学学报·医学版

OBJECTIVE@#To assess the value of fetal anteroposterior renal pelvic diameter (APD) in predicting antenatal hydronephrosis requiring surgical treatment after birth.@*METHODS@#A total of 525 cases of antenatal hydronephrosis detected by prenatal ultrasonography (ultrasound index APD ≥ 4 mm in the second trimester and APD ≥ 7 mm in the third trimester) in Zhejiang Prenatal Diagnosis Center from June 2007 to June 2018 were retrospectively analyzed. ROC curve was used to analyze the relationship between these ultrasound indicators and the requirement for surgical treatment after birth.@*RESULTS@#There were 162 cases (30.9%) diagnosed in the second trimester and 363 cases (69.1%) diagnosed in the third trimester; 131 cases were diagnosed pathologically after birth, of which 121 finally underwent surgical treatment. The area under ROC curve (AUC) of APD in middle pregnancy for prediction of requiring surgery 1-12 years after birth was 0.910; the cut-off value of APD was 8.45 mm with a sensitivity of 97.1%, specificity of 70.9%, positive predictive value (PPV) of 47.9%, and negative predictive value (NPV) of 98.9%. The AUC of APD in late pregnancy for prediction of requiring surgery 1-12 years after birth was 0.800; the cut-off value of APD was 12.25 mm with a sensitivity of 66.7%, specificity of 81.2%, PPV of 51.7%, and NPV of 89.1%.@*CONCLUSIONS@#APD in pregnancy can be used to predict whether the fetus with hydronephrosis needs surgical treatment after birth, and the prediction value of APD in the middle pregnancy is better.

Learning robotic pyeloplasty without simulators: an assessment of the learning curve in the early robotic era

OBJECTIVE: To analyze our experience and learning curve for robotic pyeloplasty during this robotic procedure. METHODS: Ninety-nine patients underwent 100 consecutive procedures. Cases were divided into 4 groups of 25 consecutive procedures to analyze the learning curve. RESULTS: The median anastomosis times were 50.0, 36.8, 34.2 and 29.0 minutes (p=0.137) in the sequential groups, respectively. The median operative times were 144.6, 119.2, 114.5 and 94.6 minutes, with a significant difference between groups 1 and 2 (p=0.015), 1 and 3 (p=0.002), 1 and 4 (p<0.001) and 2 and 4 (p=0.022). The mean hospital stay was 7.08, 4.76, 4.88 and 4.20 days, with a difference between groups 1 and 2 (p<0.001), 1 and 3 (p<0.001) and 1 and 4 (p<0.001). Clinical and radiological improvements were observed in 98.9% of patients. One patient presented with recurrent obstruction. CONCLUSIONS: Our results demonstrate a high success rate with low complication rates. A significant decrease in hospital stay and surgical time was evident after 25 cases.

Is vaginal reflux associated with urinary tract infection in female children under the age of 36 months? / 소아과

PURPOSE: To determine the relationship between vaginal reflux (VR) and urinary tract infection (UTI) in female children aged < 36 months. METHODS: A single center retrospective study was performed for 191 girls aged < 36 months, with a diagnosis of febrile UTI, who underwent a voiding cystourethrography (VCUG) for assessment of vesicoureteral reflux (VUR) at Sanggye Paik Hospital. Fifty-one girls, who underwent VCUG for assessment of congenital hydronephrosis or renal pelvis dilatation, without a UTI, formed the control group. The correlation between the presence and grade of VR and UTI was evaluated. RESULTS: The prevalence rate of VR was higher in the UTI (42.9%) than control (13.7%) group (P < 0.05), with a higher VR severity grade in the UTI (mean, 0.64) than control (mean, 0.18) group (P < 0.05). On subanalysis with age-matching (UTI group: n=126, age, 5.28±2.13 months; control group: n=22, age, 4.79±2.40 months; P=0.33), both VR prevalence (43.65% vs. 18.18%, P < 0.05) and grade (0.65 vs. 0.22, P < 0.05) remained higher in the UTI than control group. Presence and higher grade of VR were associated with UTI recurrence (P < 0.05). VR was correlated to urosepsis (P < 0.05). The renal defect rate of patients with VR (VR [+]/VUR [+]) was not different from that of patients without VR (74% vs. 52%, P=0.143) in the VUR group; however, it was higher than that of VR (+)/VUR (−) patients (74% vs. 32%, P=0.001). If a child with VR (+)/VUR (+) is exposed to a UTI, the risk of renal defect increases. CONCLUSION: Occurrence of VR is associated with UTI recurrence and urosepsis in pediatric female patients.

Sondagem da pelve renal guiada por cistoscopia em éguas / Catheterization of the renal pelvis guided by cistoscopy in mare

O objetivo deste trabalho foi padronizar a técnica de acesso à pelve renal por meio de sondagem ureteral guiada por cistoscopia em éguas. Foram utilizados oito animais, de raças variadas, com peso médio de 439kg. As éguas foram sedadas e mantidas em tronco de contenção para a realização da cistoscopia com endoscópio flexível. Após identificação do óstio ureteral esquerdo, uma sonda de polietileno foi introduzida em seu lume, até a pelve renal. A localização da sonda no rim foi confirmada por meio de ultrassonografia transcutânea. Foram coletados 3mL de urina, de forma asséptica, para citologia e cultura bacteriana. Todas as amostras obtiveram resultados negativos na cultura e análise do sedimento urinário. Nenhum dos animais apresentou quaisquer complicações após a sondagem. Este estudo demonstrou que a coleta de urina diretamente da pelve renal em éguas, com auxílio da cistoscopia na realização da sondagem ureteral, consiste em um procedimento viável e seguro.(AU)

The objective of this study was to standardize the technique of access to the renal pelvis by means of ureteral catheterization guided by cystoscopy in mares. Eight animals of different races were used, with an average weight of 439kg. The mares were sedated and contained in containment trunk for the accomplishment of cystoscopy with flexible endoscope. After the identification of the left ureteral ostium, from where inside a catheter was introduced, which went through the entire extension of the ureter up to the renal pelvis. After identification of the left ureteral ostium, from where inside a catheter was introduced, into its lumen until reaching the renal pelvis. The location of the probe in the kidney was confirmed by transcutaneous ultrasonography. Three ml of urine was aspirated aseptically for cytology and microbiological culture. All the samples obtained negative results in the culture and sedimentation. None of the animals had any complications after catheterization. This study demonstrated that the collection of urine directly from the renal pelvis in mares, with the assistance of cystoscopy in the realization of the ureteral catheter, consists of a viable and safe procedure.(AU)