Vesicoureteral Reflux In Children Research Articles

Prevalence of Urinary Tract Infection and Vesicoureteral Reflux in Children with Lower Urinary Tract Dysfunction

Lower urinary tract dysfunction is a common pediatric urological problem that is often associated with urinary tract infection. We determined the prevalence of a urinary tract infection history in children with lower urinary tract dysfunction and its association, if any, with gender, bowel dysfunction, vesicoureteral reflux and specific lower urinary tract conditions. We retrospectively reviewed the charts of children diagnosed with and treated for lower urinary tract dysfunction, noting a history of urinary tract infection with or without fever, gender, bowel dysfunction and vesicoureteral reflux in association with specific lower urinary tract conditions. Of the 257 boys and 366 girls with a mean age of 9.1 years 207 (33%) had a urinary tract infection history, including 88 with at least 1 febrile infection. A total of 64 patients underwent voiding cystourethrogram/videourodynamics, which revealed reflux in 44 (69%). In 119 of the 207 patients all infections were afebrile and 18 underwent voiding cystourethrogram/videourodynamics, which revealed reflux in 5 (28%). A urinary tract infection history was noted in 53% of girls but only 5% of boys (p <0.001). Patients with detrusor underutilization disorder were statistically more likely to present with an infection history than patients with idiopathic detrusor overactivity disorder or primary bladder neck dysfunction (each p <0.01). Females with lower urinary tract dysfunction have a much higher urinary tract infection incidence than males. This association was most often noted for lower urinary tract conditions in which urinary stasis occurs, including detrusor underutilization disorder and dysfunctional voiding. Reflux was found in most girls with a history of febrile infections. Since reflux was identified in more than a quarter of girls with only afebrile infections who were evaluated for reflux, it may be reasonable to perform voiding cystourethrogram or videourodynamics in some of them to identify reflux.

Incidence of Abnormal Imaging and Recurrent Pyelonephritis after First Febrile Urinary Tract Infection in Children 2 to 24 Months Old

The AAP (American Academy of Pediatrics) no longer recommends voiding cystourethrogram in children 2 to 24 months old who present with a first urinary tract infection if renal-bladder ultrasound is normal. We identified factors associated with abnormal imaging and recurrent pyelonephritis in this population. We retrospectively evaluated children diagnosed with a first episode of pyelonephritis at age 2 to 24 months using de-identified electronic medical record data from an institutional database. Data included age at first urinary tract infection, gender, race/ethnicity, need for hospitalization, intravenous antibiotic use, history of abnormal prenatal ultrasound, renal-bladder ultrasound and voiding cystourethrogram results, urinary tract infection recurrence and surgical intervention. Risk factors for abnormal imaging and urinary tract infection recurrence were analyzed by univariate logistic regression, the chi-square test and survival analysis. We identified 174 patients. Of the 154 renal-bladder ultrasounds performed 59 (38%) were abnormal. Abnormal prenatal ultrasound (p = 0.01) and the need for hospitalization (p = 0.02) predicted abnormal renal-bladder ultrasound. Of the 95 patients with normal renal-bladder ultrasound 84 underwent voiding cystourethrogram. Vesicoureteral reflux was more likely in patients who were white (p = 0.003), female (p = 0.02) and older (p = 0.04). Despite normal renal-bladder ultrasound, 23 of 84 patients (24%) had dilating vesicoureteral reflux. Of the 95 patients with normal renal-bladder ultrasound 14 (15%) had recurrent pyelonephritis and 7 (7%) went on to surgical intervention. Despite normal renal-bladder ultrasound after a first pyelonephritis episode, a child may still have vesicoureteral reflux, recurrent pyelonephritis and the need for surgical intervention. If voiding cystourethrogram is deferred, parents should be counseled on these risks.

Vesicoureteric reflux in children

Aim:This study aimed to identify the differences between primary and secondary vesicoureteric reflux (VUR) and the effect of associated bladder abnormalities on kidney function.Patients and Methods:We retrospectively reviewed the medical records of children with VUR who were followed up at King Abdulaziz University Hospital from January 2005 to December 2010. The review included results of radiological investigations and kidney function tests. We used Chi-square test for statistical analysis and paired t-test to compare group means for initial and last creatinine levels.Results:Ninety-nine children were included in this study. Twenty (20.2%) had primary VUR, 11 had high-grade VUR, while 9 had low-grade reflux. All children with low-grade VUR had normal dimercaptosuccinic acid (DMSA). Renal scars were present in 72% of the children with high-grade VUR. The mean creatinine levels (initial and last) for both groups were normal. Seventy-nine (79.8%) children had secondary VUR, which was due to posterior urethral valves (PUV) (46.8%), neurogenic bladder caused by meningomyelocele (25.3%), non-neurogenic neurogenic bladder (NNB) (21.5%), or neurogenic bladder associated with prune belly syndrome (6.3%). Children with NNB, meningomyelocele and PUV had high creatinine at presentation with no considerable worsening of their kidney functions during the last visit. Renal scars were present in 49.4% of the children with secondary VUR.Conclusion:Children with primary VUR and normal bladder had good-functioning kidneys, while those with secondary VUR associated with abnormal bladder caused by NNB, spina bifida or PUV had abnormal kidney functions. DMSA scans were useful in predicting higher grades of VUR in children with primary reflux.

Comparative Analysis between Top-Down and Down-Top Approach in Children with Febrile Urinary Tract Infection

Purpose We performed a comparative analysis of the usefulness of top-down and down-top approach in children with febrile urinary tract infection (UTI). Materials and Methods Among 79 children, 42 children had undergone voiding cystourethrography (VCUG) and dimercaptosuccinic acid (DMSA) scintigraphy. High grade vesicoureteral reflux (VUR) was defined as grade VI and V. We analyzed the detection rate of VUR between down-top (group I) and top-down approach (group II). Results The mean age of 42 children (Boys 25, girls 17) was 30.3±33.2 years. Among 42 children, 22 (52.4%) were diagnosed as VUR. Detection rate of VUR in groups I and II was 52.4% and 33.3%, respectively (p=0.078). Detection rate of VUR according to sex and age was 56.0% and 36.0% in boys (p=0.156), 47.1% and 29.4% in girls (p=0.290), and 38.9% and 16.7% in children younger than one year of age (p=0.041), and 62.5% and 45.8% in children older than one year of age (p=0.247), respectively. In high grade VUR, there was a similar detection rate of VUR, regardless of sex or age. Sensitivity, specificity, and positive prediction rate of DMSA scintigraphy in all patients and children with high grade VUR were 63.6%, 80.0%, 77.8%, and 84.6%, 80.0%, 73.3%, respectively. Conclusions In children with febrile UTI who were younger one year of age, down-top approach was more useful for diagnosis of VUR. Therefore, VCUG may initially be needed for diagnosis of VUR in children with febrile UTI who were younger than one year of age.

Value of Ultrasound in Children with Urinary Tract Infection and Vesicouretric Reflux

Objectives: the study aims to assess different urological abnormalities associated with UTI in children &amp; to determine the value of ultrasound in vesicoureteral reflux (VUR). Methodology: Retrospective study of the ultrasound and micturating cystourethrogram (MCUG) results of 80 children under 5 years of age with clinically labelled cases of first time urinary tract infection (UTI) over a 2 years period. Thirty cases had excretory urography tailored according to the case. The study assesses different renal, uretric and urinary bladder abnormalities associated with first time UTI in children. Ultrasound findings were also assess VUR and suggest its presence if dilatation of the pelvi-calyces, dilatation of the ureters, or dilatation of the collecting system of one or both kidneys was reported. Statistical analysis used include sensitivity, specificity, positive predictive value and negative predictive value. Results: A total of 80 patients (20 days-5 years) (median age 18 months), 42 (52% were female), 38 (48% were males). In analysis of US findings: hydronephrosis and urinary bladder mucosa thickenings (cystitis) each 28.7 % were the commonest, renal stones and congenital anomalies: 11.2 % and 10% respectively. The urinary bladder stones were 6.2%. The prevalence of VUR was 25%. Ultrasound findings were positive for VUR in 8 of 20 patients with confirmed VUR on MCUG, and positive in 15 of 60 patients without VUR on MCUG. of 12 patients who had a normal ultrasound but showed VUR on MCUG, 7 had grade II reflux, 3 grade III reflux, and two grade IV reflux. The sensitivity and specificity of ultrasound in suggesting VUR were 40% and 80%, respectively. The positive predictive value of ultrasound in suggesting VUR was 34%; the negative predictive value was 83%. Conclusions: Uultrasound useful to evaluate children with different urological abnormalities associated with UTI in children but its neither sensitive nor specific for VUR in children with UTI. Clinician should not depend on ultrasound only for diagnosis of VUR and must proceed to other like voiding colour Doppler US with echo enhancement or MCUG

Retrograde Approach to a Diverticular Kidney Stone through a Vesicoureteral Cohen's Reimplantation: A Novel Surgical Technique

Cohen's technique is the standard treatment of vesicoureteral reflux in children. Its disadvantage is still the classic difficulty in subsequent retrograde ureteral access, requiring the use of percutaneous techniques in the treatment of kidney stones. We describe a novel surgical technique for retrograde catheterization of an adult ureter by a flexible ureterorenoscope, thereby facilitating the treatment of a symptomatic diverticular kidney stone. We compare our technique to other methods described in the literature.

Value of sonography in the diagnosis of mild, moderate and severe vesicoureteral reflux in children

This study was conducted to determine the positive predictive value (PPV) of gray scale sonography in the diagnosis of mild, moderate and severe vesicoureteral reflux (VUR). This cross-sectional descriptive analytic study was conducted in the University Clinic of Isfahan University of Medical Sciences in 2008. The study was performed on children aged two to 12 years; female children with febrile urinary tract infection (UTI) and clinical suspicion of VUR and males with history of UTI and VUR who attended follow-up during the six months study period were selected. Non-cooperative patients were excluded from the study. A total of 90 patients were studied. The data gathering method was sequential. The following sonographic parameters were assessed in all the study patients: antero-posterior pelvic diameter, distal ureteric diameter and stasis of urinary system, which were measured at rest and during and after the Valsalva maneuver. Also, the vesicoureteral junction distance and distance of vesicoureteral junction to the midline were measured on both sides at rest. We then referred them for radionuclide cystography (RNC) and the results of the two methods were compared. Data were analyzed with SPSS program and t-test and chi square formulas were used. The sensitivity of ultrasound in the diagnosis of VUR was 70.9% and the specificity was 51.4%. Thus, the PPV was 69.64% and the negative predictive value was 52.94%. Although the most definite diagnosis of VUR is made with micrurating cystoureterography or RNC, sonography may be used as the first step in evaluation for VUR, especially in high-grade VUR.

Models of Care for Vesicoureteral Reflux With and Without an End Point of Reflux Resolution: A Computer Cost Analysis

Accepted for publication December 14, 2012. AS providers increasingly believe in a more benign natural history of childhood vesicoureteral reflux, many have adopted a noninterventional approach, reserving aggressive therapy for select patients. On the other hand, the availability of subureteral injection has caused many to question whether indications for correction of vesicoureteral reflux should be more liberal than in the past. Options for VUR correction include open reimplantation and laparoscopic or robotic operations that replicate open reimplantation. Unlike the other minimally invasive options, dextranomer/ hyaluronic acid injection is well established in the treatment of VUR, offering an outpatient and virtually pain-free alternative to open surgery. However, this approach is controversial, and reported early and long-term success rates vary widely. We previously used a population model based on a theoretical cohort of girls with VUR followed for 5 years to examine surgical timing, impact of bladder dysfunction on cost of treatment, and dextranomer/hyaluronic acid injection success rates necessary to achieve cost equivalence to open surgical and standard treatment paradigms. With time costs have changed, as have attitudes toward what constitutes standard management. In particular practitioners are increasingly inclined to observe VUR, or to

Diagnostic value of MCU to check screening for VUR in children

Objective To discuss the diagnostic value of micturition cystourethrography (MCU) to check screening for vesicoureteral reflux (VUR) in children.Methods 90 cases of urinary tract infection (UTI) children who received treatment in our hospital from July 2010 to December 2011 were selected and applied for examination using both uhrasonography (USG) and MCU methods.All patients received USG to examine upon arrival at the hospital,and were examined by MCU after one week' s control treatment of UTI.Then the detection rates of both methods were compared.Results There were 30 cases (33.33％) of VUR after examination by USG and there were 43 cases (47.78％) of VUR after examination by MCU.The detection rate of MCU was obviously higher than that of USG.The comparison was quite obvious (P＜ 0.05).Conclusion Using MCU to diagnose VUR in early period could lead to high detection rate,effectively avoiding renal scars and directly influencing the prognosis and outcome of patients diseases. Key words: Urinary tract infection (UTI); Micturition cystourethrography (MCU); Vesicoureteral reflux (VUR)

Febrile Urinary Tract Infections After Ureteroneocystostomy and Subureteral Injection of Dextranomer/Hyaluronic Acid for Vesicoureteral Reflux—Do Choice of Procedure and Success Matter?

Despite success rates favoring ureteroneocystostomy over subureteral injection of dextranomer/hyaluronic acid for correction of vesicoureteral reflux, the reported incidence of postoperative febrile urinary tract infection favors the latter. We evaluated contemporary treatment cohorts for an association between correction of vesicoureteral reflux and risk of postoperative febrile urinary tract infection. We retrospectively reviewed the records of 396 consecutive patients who underwent ureteroneocystostomy or subureteral injection of dextranomer/hyaluronic acid between 1994 and 2008. Time to event multivariate analyses included preoperative grade of vesicoureteral reflux and bladder/bowel dysfunction. Of 316 patients meeting study criteria 210 underwent ureteroneocystostomy (356 ureters) and 106 underwent subureteral injection of dextranomer/hyaluronic acid (167). Median patient age was 5.7 years (IQR 3.4 to 8.3). Median followup was 28 months (IQR 8 to 61). Ureteral success was significantly greater after ureteroneocystostomy (88%, 314 of 356 cases) vs subureteral injection of dextranomer/hyaluronic acid (74%, 124 of 167, p = 0.0001). When controlling for preoperative grade of vesicoureteral reflux and bladder/bowel dysfunction, the risk of persistent reflux was 2.8 times greater after subureteral injection of dextranomer/hyaluronic acid (95% CI 1.7-4.7, p <0.0001). The incidence of febrile urinary tract infection did not significantly differ between ureteroneocystostomy (8%, 16 of 210 cases) and subureteral injection of dextranomer/hyaluronic acid (4%, 4 of 106; HR 1.96, 95% CI 0.64-5.9, p = 0.24) even when controlling for preoperative grade of vesicoureteral reflux, a predictor of postoperative febrile urinary tract infection on multivariate analysis (HR 2.2 per increase in grade, 95% CI 1.3-3.6, p = 0.0022). Persistent reflux was not a predictor of postoperative febrile urinary tract infection (HR 0.81, 95% CI 0.22-2.9, p = 0.75 for ureteroneocystostomy vs HR 1.8, 95% CI 0.2-17.3, p = 0.6 for subureteral injection of dextranomer/hyaluronic acid and HR 1.8, 95% CI 0.3-3.3, p = 0.6 for both). The incidence of postoperative febrile urinary tract infection may be independent of radiographic procedural success.

Endoscopic treatment of vesicoureteral reflux in children with subureteral dextranomer/hyaluronic acid injection: a single-centre, 7-year experience

The goals of medical intervention in patients with vesicoureteral reflux are to allow normal renal growth, prevent infections and pyelonephritis, and prevent renal failure. We present our experience with endoscopic treatment of vesicoureteral reflux in children by subureteral dextranomer/hyaluronic acid copolymer injection. Under cystoscopic guidance, dextranomer/hyaluronic acid copolymer underneath the intravesical portion of the ureter in a subureteral or submucosal location was injected in patients undergoing endoscopic correction of vesicoureteral reflux. A total of 282 patients (120 boys and 162 girls) underwent the procedure. There were 396 refluxed ureters altogether. The mean age of patients was 4.9 years. The mean overall follow-up period was 44 months. Among the 396 ureters treated, 76% were cured with a single injection. A second and third injection raised the cure rate to 93% and 94%, respectively. Twenty-two (6%) ureters failed all 3 injections, and were converted to open surgery. Endoscopic treatment of vesicoureteral reflux can be recommended as a first-line therapy for most cases of vesicoureteral reflux, because of the short hospital stay, absence of complications and the high success rate.

Identifying Children with Vesicoureteral Reflux: A Comparison of 2 Approaches

Various screening approaches have been proposed to identify the subgroup of children with urinary tract infection who have vesicoureteral reflux. However, few studies have compared the sensitivity of screening approaches in a representative population of young children. We compared the sensitivities of the top-down ((99m)technetium dimercaptosuccinic acid renal scan to screen) and biomarker based (C-reactive protein level at presentation) approaches in identifying children with vesicoureteral reflux. We calculated the sensitivity of the 2 screening approaches in detecting vesicoureteral reflux and subsequently high grade (III or greater) vesicoureteral reflux in children. The top-down and C-reactive protein based approaches missed 33% and 29% of cases of high grade vesicoureteral reflux, respectively. The sensitivity of the top-down approach for detecting high grade vesicoureteral reflux was lower than previously reported. Further study of novel methods to identify children at risk for renal scarring is warranted.

The association of adult kidney size with childhood vesicoureteral reflux

We used ultrasound to measure kidney volumes in adults with a history of childhood vesicoureteral reflux (VUR) and assessed whether total renal volume, small kidney size or the thickness of the upper pole correlated with renal function or hypertension. The kidneys of 123 adults were studied by ultrasound, calculating their volumes using an ellipsoid formula normalised to body surface area (Vol(N)). The thickness of the upper pole parenchyma and the number of small kidneys (<80% of normal volume) were recorded. Blood pressure measurements and laboratory tests were also performed. Kidneys with a history of VUR were 12% smaller than those without known VUR (p < 0.05), and those with prior dilating VUR were 16% smaller than those with non-dilating VUR (p < 0.05). There was a moderate correlation (r = 0.42, p < 0.05) between total Vol(N) and GFR values in the total patient series. Thirteen percent of the patients had a moderate decrease in kidney function. The occurrence of hypertension and proteinuria was not affected by either kidney size or a thin upper pole. Total Vol(N) in ultrasound in early adulthood could probably predict possible renal deterioration in later life. The occurrence of one small kidney was a common finding and seemed not to affect the prevalence of proteinuria or hypertension.

Use of Validated Bladder/Bowel Dysfunction Questionnaire in the Clinical Pediatric Urology Setting

Questionnaires to quantify pediatric bladder/bowel dysfunction have recently been developed as research instruments. We evaluated our use of a bladder/bowel dysfunction questionnaire in a busy clinical setting. We distributed a validated bladder/bowel dysfunction questionnaire to all new pediatric urology outpatients older than age 4 years from May 1 to July 31, 2010. We instructed families to complete the questionnaire without assistance. Physicians were blinded to responses during the study period. We compared total scores between groups of patients with bladder/bowel dysfunction related and bladder/bowel dysfunction unrelated primary diagnoses. We also compared individual item scores pertaining to urinary incontinence, dysuria, nocturnal enuresis and constipation in patients with those specific primary ICD-9 diagnosis codes to those of other bladder/bowel dysfunction related diagnoses. Of 358 questionnaires reviewed 91 (25%) could not be adequately scored. Of the remaining 267 patients 134 had bladder/bowel dysfunction related diagnoses and 133 had bladder/bowel dysfunction unrelated diagnoses. The patients with bladder/bowel dysfunction related diagnoses had a higher score on the validated questionnaire (p <0.001). Patients with primary ICD-9 diagnoses for urinary incontinence (p = 0.0026, p = 0.0164), dysuria (p = 0.008) and nocturnal enuresis (p <0.0001) had higher scores on corresponding items of the questionnaire than those with other bladder/bowel dysfunction related diagnoses. The ICD-9 diagnosis of constipation was not associated with higher scores for constipation related items. A validated bladder/bowel dysfunction questionnaire is a useful tool in the pediatric urology clinical setting that correlates well with physician assessment. The questionnaire can help patients and their families better define their bladder/bowel symptoms before their visit. Some families will not be able to fill out the questionnaire appropriately.

The RIVUR Voiding Cystourethrogram Pilot Study: Experience with Radiologic Reading Concordance

Two reference radiologists independently review voiding cystourethrograms for the National Institutes of Health sponsored RIVUR (Randomized Intervention for Children with Vesicoureteral Reflux) trial for children with vesicoureteral reflux. A pilot study was required from all clinical centers before enrolling patients. Digital images were reviewed. Responses were compared and discrepancies adjudicated by teleconference to a final assessment. A total of 75 studies from 19 sites were reviewed. Discrepancies in vesicoureteral reflux grade level were noted on the left and right side in 11 (15%, kappa 0.85) and 12 (16%, kappa 0.83) ureters, respectively. Other areas of disagreement were the presence of paraureteral diverticulum (left 11%, kappa 0.31; right 9%, kappa 0.34), urethral anatomy (15%, kappa 0.33), whether the child voided (8%, kappa 0.21), the presence of ureteral duplication (left 7%, kappa 0.64; right 3%, kappa 0.78) and the presence of bladder trabeculation (5%, kappa 0.32). Of 83 ureters in which reflux was seen there was grade disagreement about 23 (28%). Of 61 ureters initially assessed as grade II or III reflux by both readers, there was disagreement on 9 (15%). Of these 9 discrepancies 7 (78%) were adjudicated to the higher grade (grade III). Discrepancies in the assessment of intermediate grade vesicoureteral reflux were noteworthy. Recommendations for patients with grade II or III reflux advanced by studies which rely on a single reading, which categorize only grade III or higher reflux as significant, may not be valid.

Single Center Experience with Endoscopic Subureteral Dextranomer/Hyaluronic Acid Injection as First Line Treatment in 1,551 Children with Intermediate and High Grade Vesicoureteral Reflux

In recent years the endoscopic injection of dextranomer/hyaluronic acid has become an established alternative to long-term antibiotic prophylaxis and the surgical management of vesicoureteral reflux. We determined the safety and effectiveness of the endoscopic injection of dextranomer/hyaluronic acid as first line treatment for high grade vesicoureteral reflux. Between 2001 and 2010, 1,551 children (496 male, 1,055 female, median age 1.6 years) underwent endoscopic correction of intermediate and high grade vesicoureteral reflux using dextranomer/hyaluronic acid soon after the diagnosis of vesicoureteral reflux on initial voiding cystourethrogram. Vesicoureteral reflux was unilateral in 761 children and bilateral in 790. Renal scarring was detected in 369 (26.7%) of the 1,384 patients who underwent dimercapto-succinic acid imaging. Reflux grade in the 2,341 ureters was II in 98 (4.2%), III in 1,340 (57.3%), IV in 818 (34.9%) and V in 85 (3.6%). Followup ultrasound and voiding cystourethrogram were performed 3 months after the outpatient procedure, and renal ultrasound was performed annually thereafter. Patients were followed for 3 months to 10 years (median 5.6 years). Vesicoureteral reflux resolved after the first, second and third endoscopic injection of dextranomer/hyaluronic acid in 2,039 (87.1%), 264 (11.3%) and 38 (1.6%) ureters, respectively. Febrile urinary tract infections developed during followup in 69 (4.6%) patients. None of the patients in the series needed reimplantation of ureters or experienced any significant complications. Our results confirm the safety and efficacy of the endoscopic injection of dextranomer/hyaluronic acid in the eradication of high grade vesicoureteral reflux. We recommend this 15-minute outpatient procedure as the first line of treatment for high grade vesicoureteral reflux.

Modified STING procedure for high-grade vesicoureteral reflux in children: intraureteral injection with ureteral orifice reposition technique

We describe a modified endoscopic injection technique for the treatment of vesicoureteral reflux (VUR). Our modification combines the STING and proximal HIT injection techniques and results in higher success rates in the resolution in VUR.

Usefulness of Concomitant Autologous Blood and Dextranomer/Hyaluronic Acid Copolymer Injection to Correct Vesicoureteral Reflux

We present the long-term results of a new modification of endoscopic treatment of vesicoureteral reflux involving concomitant injection of autologous blood following the standard hydrodistention injection technique to prevent bulking agent leakage immediately after the procedure. A total of 341 children underwent endoscopic implantation of dextranomer/hyaluronic acid for vesicoureteral reflux. A subset of 171 patients underwent hydrodistention autologous blood injection, while 170 underwent classic hydrodistention injection. Frequency of symptomatic urinary tract infection after endoscopic treatment was recorded. Success was defined as absence of vesicoureteral reflux on postoperative voiding cystourethrography. A total of 523 ureters in 214 girls and 127 boys were treated. In patients undergoing hydrodistention autologous blood injection mean age was 39.48 months, mean maximal reflux grade was 3.02 and success rate was 93.6% after the first injection (98.0% in patients with grade II, 92.1% with grade III, 93.3% with grade IV and 85.7% with grade V reflux). In patients who underwent classic hydrodistention injection mean age was 36.12 months, mean maximal reflux grade 3.05 and success rate was 81.8% after the first injection (91.5% in patients with grade II, 89.4% with grade III, 74.4% with grade IV and 44.4% with grade V reflux). The success rate was significantly higher (p = 0.001) in patients undergoing hydrodistention autologous blood injection vs classic hydrodistention injection. Of the patients 1.7% in the hydrodistention autologous blood injection group and 2.9% in the classic hydrodistention injection group reported symptomatic urinary tract infection during followup. Immediate injection of autologous blood following dextranomer/hyaluronic acid injection to create a blood clot and barricade against bulking agent leakage is more effective than pure dextranomer/hyaluronic acid implantation. This novel modification stabilizes the subureteral implant mount and may affect the antireflux outcome.

Ureteral Advancement in Patients Undergoing Laparoscopic Extravesical Ureteral Reimplantation for Treatment of Vesicoureteral Reflux

Laparoscopic extravesical ureteral reimplantation for vesicoureteral reflux has gained acceptance as a feasible treatment associated with minimal morbidity. However, ureteral advancement with this technique has not been attempted. We examined the usefulness of ureteral advancement via laparoscopy. A total of 30 patients with 51 refluxing ureters underwent laparoscopic extravesical ureteral reimplantation for treatment of vesicoureteral reflux between August 2009 and September 2011. Mean ± SD patient age was 60.8 ± 48.6 months. During the procedure 15 patients underwent ureteral advancement (advancement group), while 15 did not (nonadvancement group). We compared operative times and postoperative rates of urinary tract infections and persistent reflux between the groups. There was no significant difference in operative times in unilateral (mean ± SD 110 ± 25 vs 125 ± 42 minutes) and bilateral cases (mean ± SD 214 ± 52 vs 203 ± 40 minutes) between the nonadvancement vs advancement groups. All patients underwent voiding cystourethrography 3 to 4 months postoperatively. Reflux resolution rate for ureters was significantly higher in the advancement group (100%) than in the nonadvancement group (85%, p <0.05). No patient in the advancement group had postoperative urinary tract infection. Fixation of the ureter with the bladder muscularis at the proximal limit of the detrusor defect and/or a percutaneous hitch stitch placed in the ventral side of the proximal limit of the detrusor defect facilitated ureteral advancement. Ureteral advancement is a simple and feasible procedure in laparoscopic ureteral extravesical reimplantation and may improve the resolution rate of vesicoureteral reflux.

Urosonografía miccional seriada: una técnica segura para el estudio de toda la vía urinaria en pediatría

For more than a decade, serial voiding urosonography has been one of the imaging modalities used to detect vesicoureteral reflux in children and it is now also used to study the urethra. The main advantage of this technique is it does not irradiate.Given the important recognition of serial voiding urosonography by the European Society of Pediatric Radiology at the last congress in May 2011, we think it is useful to describe how to carry out this technique successfully.In this update on serial voiding urosonography, we describe the indications, the entire procedure, and the different characteristics of this technique, which we understand will soon become the technique of choice for screening for vesicoureteral reflux as well as for urethral pathology in children