Transcutaneous electrical nerve stimulation in children with overactive bladder: a randomized clinical trial

PURPOSE

We evaluated the effectiveness of parasacral transcutaneous electrical nerve stimulation to treat overactive bladder in children. We designed a prospective randomized trial with sham control for this evaluation.

MATERIALS AND METHODS

We prospectively randomized 25 girls and 12 boys with an average age of 7.6 years (range 4 to 12) into the test (active treatment) or sham (superficial scapular electrical stimulation) group. A total of 20 sessions, 20 minutes each (10 Hz) were performed 3 times weekly. The criteria used to evaluate the rate of success were 1) self-reported cure, or significant, mild or no improvement; 2) visual analogue scale (level of success 0 to 10); 3) percent improvement; 4) modified Toronto score; and 5) maximum voided volume, average voided volume and number of voids daily based on bladder diary entries. After completion of the 20 sessions controls who were not cured underwent active treatment.

RESULTS

A total of 21 patients in the test group and 16 in the sham group underwent treatment. Among the active treatment group 61.9% of parents reported cure. In the sham group no parent reported cure (p <0.001). Regarding visual analogue scale a score of 10 was indicated by 13 parents in the test group, while 1 parent in the sham group indicated a score of 9 (p = 0.002). Additionally 100% improvement was reported by 12 parents in the test group and no parent in the sham group. Toronto score improved significantly in the test group (p <0.001) and sham group (p = 0.008). However, the score was reduced more significantly in the test group compared to the sham group (p = 0.011). In the test group average and maximum voided volumes showed a statistically significant increase and the number of voids daily decreased. After superficial scapular electrical stimulation 13 of the 16 patients who underwent parasacral transcutaneous electrical nerve stimulation were cured.

CONCLUSIONS

This is the first known randomized clinical trial to demonstrate that parasacral transcutaneous electrical nerve stimulation is effective in the treatment of children with overactive bladder.

Cross-cultural adaptation of the dysfunctional voiding score symptom (DVSS) questionnaire for Brazilian children

PURPOSE

To translate and culturally adapt the Dysfunctional Voiding Symptom Score (DVSS), questionnaire into Brazilian Portuguese.

MATERIALS AND METHODS

The 10-item Dysfunctional Voiding Symptom Score (DVSS) was translated into Brazilian Portuguese according to a standard methodology: translation, synthesis, back-translation, Expert Committee, and pre-testing. After the translation process the final version was pre-tested and patient responses were analyzed to identify necessary modifications. Reliability was evaluated using the test-retest method, and internal consistency was assessed using Cronbach's alpha.

RESULTS

The Cronbach's alpha coefficient was calculated in the test and retest phases. Internal consistency was found to be satisfactory, as confirmed by a Cronbach's alpha coefficient of 0.76 for the test and 0.77 for the retest. A high degree of stability was found in the test/retest, with an intraclass correlation coefficient (ICC) of 0.960 (p < 0.001; 95% CI: 0.943-0.972).

CONCLUSIONS

The cross-cultural adaptation process of the Dysfunctional Voiding Symptom Score questionnaire to be used on Brazilian children was successfully completed following internationally accepted methodologies.

Nonpharmacological treatment of lower urinary tract dysfunction using biofeedback and transcutaneous electrical stimulation: a pilot study

OBJECTIVE

To report a series of children with lower urinary tract dysfunction (LUTD) whose urge syndrome was treated by electrical stimulation, and their voiding dysfunction by biofeedback; none of the children were using anticholinergic drugs during treatment.

PATIENTS AND METHODS

In all, 36 children who presented with symptoms of urinary urgency and/or daily incontinence completed the treatment and were prospectively evaluated. The mean (range) follow-up was 13.8 (4-24) months, and their mean age 7 (3-14) years, 17 children were aged <5 years. The children were divided into two groups: group 1, with urge syndrome treated with superficial parasacral electrical stimulation, and group 2, with voiding dysfunction, treated with biofeedback.

RESULTS

In group 1, the mean (range) number of electrical stimulation sessions was 13.1 (4-20). Of the 19 children treated, 12 had a complete clinical improvement, six a significant improvement, and one a mild improvement. In group 2, the mean (range) number of biofeedback sessions was 6 (4-14). Of the 17 children treated, there was complete improvement of symptoms in 10, significant improvement in two and mild improvement in five. Six children who had no resolution of symptoms after biofeedback had salvage therapy with electrical stimulation, after which four had complete improvement of symptoms, and two a 90% and 40% improvement, respectively. Taking the two groups together, after treatment, four children developed isolated episodes of urinary tract infection. Of 21 children with nocturnal enuresis, bed-wetting continued in 13 (62%) after treatment.

CONCLUSION

In this short-term follow-up, the nonpharmacological treatment of voiding dysfunction using biofeedback, and of urge syndrome by electrical stimulation, was effective for treating LUTD in children.

Bladder calculi in children who perform clean intermittent catheterization

OBJECTIVE

To examine the role of clean intermittent catheterization (CIC) as a possible predisposing risk factor for bladder calculi, assessing risk factors in patients with and without bladder augmentation, and to evaluate management options for bladder calculi in these patients.

PATIENTS AND METHODS

The records of 403 patients who were using a regimen of CIC between January 1981 and March 1998 were reviewed to identify those forming bladder calculi; stones were diagnosed in 28 patients. The patients were categorized as: group 1, patients with no bladder augmentation who catheterized urethrally (227, group 1a) or via a Mitrofanoff conduit (18, group 1b); group 2, patients with augmented bladders who catheterized urethrally (100, group 2a) or via a Mitrofanoff conduit (58, group 2b). The incidence of bladder calculi in each group was determined and compared statistically where applicable. The success of the treatment options for stone management was reviewed.

RESULTS

Bladder calculi developed in 5% of patients in group 1a, 8% in group 2a, 11% in group 1b, and 10% in group 2b; the incidence of calculi was not significantly different among the groups. Of these patients, 18 (64%) were asymptomatic at the time of diagnosis and significant bacteriuria was found in 23 (88%). Difficulty in catheterizing either the Mitrofanoff conduit or the native urethra was reported in 14 (50%) of these patients. Calculi were more often solitary (71%) and typically composed of struvite or apatite. Calculi were managed by open cystolithotomy in 15 patients (54%) and endoscopically in 13 (46%). Stones recurred in nine patients (32%) after treatment, comprising four of six patients treated endoscopically with electrohydraulic lithotripsy and in five of 15 after open cystolithotomy. The mean interval to recurrence was 22.8 months.

CONCLUSION

These results suggest that patients on a regimen of CIC are at risk of developing bladder calculi but the incidence of calculi is not influenced by bladder augmentation. The presence of a Mitrofanoff conduit was associated with a slightly increased incidence of calculus formation. Open cystolithotomy was associated with a lower stone recurrence rate but there were too few patients to draw definitive conclusions.

Constipation and Lower Urinary Tract Dysfunction in Children and Adolescents: A Population-Based Study

OBJECTIVE

To evaluate the correlation between constipation and lower urinary tract dysfunction (LUTD) and nocturnal enuresis in a population-based study.

MATERIAL AND METHODS

This is a cross-sectional study. The criteria for inclusion were children and adolescents of between 5 and 17 years and who agreed to sign the informed consent form. The study excluded students with neurological problems or who had documented abnormalities of the urinary tract. To identify the presence and severity of LUTD, we used the Voiding Dysfunction Symptom Score (DVSS). To evaluate the presence of constipation, Rome III questionnaire was used.

RESULTS

We interviewed 829 children and adolescents, of which 416 (50.18%) were male. The mean (SD) age was 9.1 (±2.9) years. The overall prevalence of LUTD was 9.1%, predominantly in girls (15 versus 3.1%, p < 0.001). Constipation was found in 9.4% of boys and 12.4% of girls (p = 0.169). Constipated children were 6.8 times more likely to have LUTD than those not constipated (p < 0.001, coefficient and correlation of 0.411). Constipation was found in 8.2% of children without LUTD and in 35.2% of children with LUTD. We performed multivariate analysis to identify urinary symptoms that are independent predictors of the presence of constipation. The presence of infrequent urination (p = 0.004) and holding maneuvers (p < 0.001) were independent predictors. It was noted also noted that constipated children, according to the Rome III criteria, possess a worse DVSS (p < 0.001). Regarding the presence of nocturnal enuresis, 12.6% of children and adolescents had constipation in association with this symptom. However, this relationship was not statistically significant (p = 0.483).

CONCLUSION

Constipated children were 6.8 times more likely to have LUTD than those not constipated. Among the urinary symptoms, infrequent voiding and holding maneuvers are independent factors of urinary expressions in constipated children. Children with more severe constipation have more prominent urinary symptoms. The presence of enuresis was not associated with constipation.

Electrical stimulation for lower urinary tract dysfunction in children: a systematic review of the literature

AIMS

To review studies using electrical neural stimulation (ENS), to treat children with non-neurogenic lower urinary tract dysfunctions (LUTD), and to establish the efficacy of this treatment.

METHODS

This review was based on an electronic search of the MEDLINE database and the Cochrane Central Search library, from January 1990 to March 2010.

INCLUSION CRITERIA

(1) participants aged 0-17 years, (2) participants with a diagnosis of LUTD not related to congenital abnormalities or neurological disease, (3) English language, and (4) treatment by ENS.

RESULTS

Seventeen papers were evaluated. Type of ENS varied among studies: sacral transcutaneous ENS in seven, sacral implanted device in four, posterior tibial percutaneous in three, and anogenital, endoanal, and intravesical in one each. There were two randomized clinical trials. Clarity regarding the LUTD being treated was variable. The populations studied were not homogeneous. The duration of treatment and the number of sessions a week were variable among the studies. Electrical parameters used also varied. A range of subjective and objective measures was used to measure treatment success. Rates of complete resolution of the symptoms of OAB, urgency, and daytime incontinence ranged from 31% to 86% [Trsinar and Kraij, Neurourol Urodyn 15: 133-42, 1996; Hagstroem et al., J Urol 182: 2072-8, 2009], 25% to 84% [Hoebeke et al., J Urol 168: 2605-8, 2002; Lordêlo et al., J Urol 182: 2900-4, 2009], 13% to 84% [Malm-Buatsi et al., Urology 70: 980-3, 2007; Lordêlo et al., J Urol 184: 683-9, 2010], respectively. For sacral transcutaneous ENS recurrence ranged from 10% to 25%. Apart from the sacral implantation studies, any reported side effects were mild and transitory.

CONCLUSIONS

The literature in the area of interest is sparse. Parasacral TENS has been shown to be more effective than sham in randomized trials in treating OAB. This deserves further research to elucidate the optimal parameters and the children for whom it is most useful.

Prospective study of transcutaneous parasacral electrical stimulation for overactive bladder in children: long-term results

PURPOSE

We evaluated the long-term success of transcutaneous parasacral electrical stimulation for overactive bladder in children.

MATERIALS AND METHODS

We prospectively evaluated children who underwent transcutaneous parasacral electrical stimulation for overactive bladder. All patients had symptoms of overactive bladder, bell curve in uroflowmetry and low post-void residual urine. The procedure was performed using a frequency of 10 Hz for 20-minute sessions 3 times weekly for a maximum of 20 sessions. Initial and long-term (more than 6 months) success rates were evaluated.

RESULTS

Transcutaneous parasacral electrical stimulation was performed in 36 girls and 13 boys with a mean age of 10.2 years (range 5 to 17). Mean followup was 35.3 months (range 6 to 80). Before treatment urgency, daytime incontinence and urinary tract infection were seen in 100%, 88% and 71% of cases, respectively. Initial success (full response) was demonstrated in 79% of patients for urgency, 76% for incontinence and 77% for all symptoms. Continued success was seen in 84% of patients for urgency, 74% for daytime incontinence and 78% for all symptoms. If the 30 patients with at least 2 years of followup were considered, treatment was successful in 73%. Recurrence of symptoms after a full response was seen in 10% of cases. Two of 33 patients (6%) with urinary tract infection before the procedure still had infection after treatment.

CONCLUSIONS

Transcutaneous parasacral electrical stimulation is well tolerated, and demonstrates short and long-term effectiveness in treating overactive bladder in children. Symptoms eventually will recur in 10% of patients.

What are the most powerful determinants of endoscopic vesicoureteral reflux correction? Multivariate analysis of a single institution experience during 6 years

PURPOSE

As the indications for endoscopic correction of vesicoureteral reflux continue to expand, the emergence of potential predictive variables has been noted. We used univariate and multivariate statistical analyses to find the most significant predictors of correction to improve patient selection.

MATERIALS AND METHODS

A consecutive series of patients treated at a single institution was reviewed. Between August 1998 and August 2004, 232 children endoscopically injected with polydimethylsiloxane were identified, representing 351 refluxing units. A total of 23 variables were subjected to statistical analysis to detect predictors of reflux correction after injection. All identified patients with complete data and followup evaluations were included irrespective of anatomical variations, previous interventions or comorbidities.

RESULTS

The overall success rate by patient and renal unit was 65% and 72%, respectively. In patients with a single system low grade (1-3) vesicoureteral reflux who did not previously undergo injection this success rate increased to 80%. Univariate analysis demonstrated that higher physician experience, low preoperative vesicoureteral reflux grade, absent renal scars and no previous injections were statistically significant predictors of vesicoureteral reflux correction (p <0.05). A history of febrile urinary tract infections and a duplex system did not attain significance (p = 0.069 and 0.076, respectively). On multivariate statistical evaluation only physician experience, preoperative vesicoureteral reflux grade and the number of previous injections remained significant.

CONCLUSIONS

Multivariate analysis of our data showed the most important determinants of vesicoureteral reflux correction after endoscopic injection. Prospective validation will allow us to generate nomograms to better select and counsel patients who would benefit from vesicoureteral reflux treatment.

Posterior tibial nerve stimulation vs parasacral transcutaneous neuromodulation for overactive bladder in children

PURPOSE

Parasacral transcutaneous electrical nerve stimulation and posterior tibial nerve stimulation have emerged as effective methods to treat overactive bladder in children. However, to our knowledge no study has compared the 2 methods. We evaluated the results of parasacral transcutaneous electrical nerve stimulation and posterior tibial nerve stimulation in children with overactive bladder.

MATERIALS AND METHODS

We prospectively studied children with overactive bladder without dysfunctional voiding. Success of treatment was evaluated by visual analogue scale and dysfunctional voiding symptom score, and by level of improvement of each specific symptom. Parasacral transcutaneous electrical nerve stimulation was performed 3 times weekly and posterior tibial nerve stimulation was performed once weekly.

RESULTS

A total of 22 consecutive patients were treated with posterior tibial nerve stimulation and 37 with parasacral transcutaneous electrical nerve stimulation. There was no difference between the 2 groups regarding demographic characteristics or types of symptoms. Concerning the evaluation by visual analogue scale, complete resolution of symptoms was seen in 70% of the group undergoing parasacral transcutaneous electrical nerve stimulation and in 9% of the group undergoing posterior tibial nerve stimulation (p = 0.02). When the groups were compared, there was no statistically significant difference (p = 0.55). The frequency of persistence of urgency and diurnal urinary incontinence was nearly double in the group undergoing posterior tibial nerve stimulation. However, this difference was not statistically significant.

CONCLUSIONS

We found that parasacral transcutaneous electrical nerve stimulation is more effective in resolving overactive bladder symptoms, which matches parental perception. However, there were no statistically significant differences in the evaluation by dysfunctional voiding symptom score, or in complete resolution of urgency or diurnal incontinence.

Hormone therapy in hypospadias surgery: a systematic review

Surgical correction of hypospadias is proposed to improve the aesthetic and functional quality of the penis. Hormone therapy preceding surgical correction is indicated to obtain better surgical conditions. However, there is divergence in the literature regarding the hormone therapy of choice, time of its use before surgery, appropriate dose, and route of application. To try to elucidate this matter, an electronic survey of the databases PubMed and Cochrane Central Library was conducted, limited to articles in English published since 1980. Search strategy identified 14 clinical trials that matched the inclusion criteria. Analysis was made in terms of study design, classification of hypospadias, association with chordee and cryptorchidism, type of hormone, route of application, dose and duration of treatment, penile length before and after hormone therapy, glans circumference before and after hormone therapy, adverse effects, and surgical complications. From the trials evaluated it was not possible to determine the ideal neoadjuvant treatment. A preference for use of testosterone was observed. Intramuscular administration seems to have fewer adverse effects than topical treatment. Side effects were seldom described, and treated patients were not followed on a long-term basis. The scarcity of randomized and controlled clinical trials regarding the topic impairs the establishment of a protocol. In conclusion, although preoperative hormone therapy is currently used before hypospadias surgery, its real benefit in terms of improvement of the penis and surgical results has not been defined.

Quality of life in patients undergoing salvage procedures for locally recurrent prostate cancer

BACKGROUND AND OBJECTIVES

As patients are being treated for prostate cancer at a younger age, a significant number of them will ultimately fail the primary treatment and will be candidates for potentially curative salvage therapy. The purpose of this study was to evaluate the impact of salvage therapy for locally recurrent prostate cancer upon the patients' quality of life.

METHODS

A cohort of 68 men with locally recurrent prostate cancer undergoing salvage treatment was included in this analysis. Data were collected for the study by mailing the subjects a self-administered questionnaire that included a General Functional Assessment of Cancer Therapy (FACT-G) and a Prostate Cancer Treatment Outcome Questionnaire (FACT-P). Group comparisons were conducted using one-way analysis of variance (ANOVA).

RESULTS

Overall, 50% and 88.6% of patients were free of biochemical recurrence in the salvage surgery (SS) and salvage radiotherapy (SRt) group, respectively (P=0.4). The physical well-being (PWB) subscale of FACT-G was significantly higher for the SRt patients (P=0.008). Using the Trial Outcome Index Prostate subscale, the Trial Outcome Index Incontinence Urinary scores, and the Functional Assessment of Incontinence Therapy-Urinary score group comparisons, patients in the SRt group had a higher quality of life than patients in the SS group (P=0.038, P=0.001, and P=0.001, respectively).

CONCLUSIONS

In the current study, patients with clinically localized prostate cancer who are at high risk for local disease recurrence may have a trend toward better disease-free survival and a better urinary continence rates if the primary treatment is radical prostatectomy rather than radiation therapy.

Management of neurogenic bladder dysfunction in children update and recommendations on medical treatment

INTRODUCTION

Defective closure of the neural tube affects different systems and generates sequelae, such as neurogenic bladder (NB). Myelomeningocele (MMC) represents the most frequent and most severe cause of NB in children. Damage of the renal parenchyma in children with NB acquired in postnatal stages is preventable given adequate evaluation, follow-up and proactive management. The aim of this document is to update issues on medical management of neurogenic bladder in children.

MATERIALS AND METHODS

Five Pediatric Urologists joined a group of experts and reviewed all important issues on "Spina Bifida, Neurogenic Bladder in Children" and elaborated a draft of the document. All the members of the group focused on the same system of classification of the levels of evidence (GRADE system) in order to assess the literature and the recommendations. During the year 2020 the panel of experts has met virtually to review, discuss and write a consensus document.

RESULTS AND DISCUSSION

The panel addressed recommendations on up to date choice of diagnosis evaluation and therapies. Clean intermittent catheterization (CIC) should be implemented during the first days of life, and antimuscarinic drugs should be indicated upon results of urodynamic studies. When the patient becomes refractory to first-line therapy, receptor-selective pharmacotherapy is available nowadays, which leads to a reduction in reconstructive procedures, such as augmentation cystoplasty.

Diagnosis and Management of Bladder Dysfunction in Neurologically Normal Children

Normal bladder and urethral sphincter development as well as neural/volitional control over bladder-sphincter function are essential steps for regular lower urinary tract function. These maturational sequences are clinically evident by the age of 5 years. However, in 17-22% of children, symptoms persist beyond that age, characterizing lower urinary tract dysfunction (LUTD). The clinical spectrum is wide and includes overactive bladder, voiding postponement, underactive bladder, infrequent voiding, extraordinary daytime only urinary frequency, vaginal reflux, bladder neck dysfunction, and giggle incontinence. LUTD may lead to vesicoureteral reflux and recurrent urinary tract infections, increasing the likelihood of renal scarring. LUTD is often associated with constipation and emotional/behavioral disorders such as anxiety, depression, aggressiveness, and social isolation, making diagnosis, and treatment imperative. Diagnosis of LUTD is essentially based on clinical history, investigation of bladder storage, voiding symptoms (urinary frequency, daytime incontinence, enuresis, urgency) and constipation. Dysfunctional Voiding Score System (DVSS) is a helpful tool. Physical examination focuses on the abdomen to investigate a distended bladder or palpable fecal mass, the lumbosacral spine, and reflex testing. Bladder diaries are important for recording urinary frequency and water balance, while uroflowmetry is used to assess voided volume, maximum flow, and curve patterns. Bladder ultrasonography to measure post-void residual urine volume and urodynamics are used as supplemental tests. Current first line treatment is urotherapy, a combination of behavioral measures to avoid postponing micturition, and a restricted diet for at least 2 months. Anticholinergics, β3 agonists and neuromodulation are alternative therapies to manage refractory overactive bladder. Cure rates, at around 40%, are considered satisfactory, with daytime symptoms improving in 32% of cases. Furthermore, children who are also constipated need treatment, preferentially with polyethylene glycol at doses of 1-1.5 g/kg in the 1st 3 days and 0.25-0.5 g/kg thereafter until the 2-month period of behavioral therapy is complete. If urotherapy fails in cases of dysfunctional voiding, the next step is biofeedback to teach the child how to relax the external urethral sphincter during micturition. Success rate is around 80%. Children with underactive bladder usually need a combination of clean intermittent catheterization, alpha-blockers, biofeedback and neuromodulation; however, cure rates are uncertain.

THE MACEDO-MALONE ANTEGRADE CONTINENCE ENEMA PROCEDURE: EARLY EXPERIENCE

PURPOSE

The successful treatment of fecal incontinence can dramatically improve the quality of life of affected children. The introduction of the Malone antegrade continence enema provides the opportunity to manage previously resistant cases. However, using the to create this catheterizable channel is not always possible, and the duration of these antegrade enemas is a source of concern for the patients. We describe a new approach to create left continent colonic access to shorten the duration of these enemas, and report the experience gained from the first 9 cases managed at our institution.

MATERIALS AND METHODS

During a 5-year period 9 patients underwent a Macedo-Malone antegrade continence enema at our institution. Incontinence was associated with myelomeningocele in 7 patients and anorectal malformation in 2. The antegrade continence enema procedure is begun by isolating a 2 cm flap in a tenia on the left colon (spleen flexure). A 12Fr silicone Foley catheter is placed on the mucosal surface of the flap to allow tubularization of the plate with interrupted polyglycolic acid 3-zero transverse sutures, creating an efferent tubular conduit. Antegrade colonic washouts were started 2 weeks after surgery with saline solution or tap water in all patients.

RESULTS

Followup of our 9 cases ranged from 8 to 33 months (average 20.7). Enema volume varied from 250 to 800 ml, with administration taking from 45 to 60 minutes, and colonic evacuation occurred within 30 to 60 minutes of enema administration. Of the 9 patients 8 were completely continent and 1 was partially continent. Four patients experienced difficulty with catheterization initially because of stenosis of the stomal track. The affected stomas were dilated, which was successful in 1 case. Three patients subsequently required stomal revision.

CONCLUSIONS

The Macedo-Malone procedure is a relatively straightforward operative approach providing an effective washout technique that is acceptable to parents and children.

Evaluation of constipation after parasacral transcutaneous electrical nerve stimulation in children with lower urinary tract dysfunction--a pilot study

OBJECTIVE

To evaluate the efficacy of parasacral transcutaneous electrical nerve stimulation (TENS) for the treatment of constipation in children with lower urinary tract dysfunction (LUTD).

MATERIALS AND METHODS

We treated 9 boys and 5 girls with a mean age of 8.07 ± 2.72 years. 10 (71.4%) had overactive bladder and 4 (28.6%) had voiding dysfunction. A total of 20 parasacral TENS sessions, 20 min each (10 Hz), were performed 3 times per week. The criteria used to assess constipation were the Rome III criteria for children, the Bristol Stool Chart, and a visual analog scale (pain from 0 to 10). The children were reassessed immediately after treatment. No specific treatment of constipation was performed.

RESULTS

After treatment, 85.7% (p < 0.001) of the children's constipation symptoms had improved following the Rome III criteria. Parasacral TENS significantly impacted the following symptoms: "the presence of at least one episode of fecal incontinence per week", "history of stool retention", and "the presence of a large fecal mass in the rectum." There was no significant change in the Bristol Stool Chart evaluation (p < 0.25), but there was a significant improving trend in level of pain before and after treatment (p < 0.063). All urinary symptoms evaluated showed improvement after TENS treatment. There was a decrease in post-void residual urine.

CONCLUSION

In this first study to evaluate the results of parasacral TENS on constipation in children with LUTD, satisfactory results were obtained for both complaints.

Effects of urinary tract infection in patients with bladder augmentation and kidney transplantation

PURPOSE

We evaluated the rate of function decline of the renal allograft in patients with augmented bladder. We also evaluated the prevalence of asymptomatic bacteriuria and urinary tract infection in these patients, and to demonstrate if these findings are predictors of allograft function decline, comparing children who underwent bladder augmentation with a control group.

MATERIALS AND METHODS

Among 170 children and adolescents undergoing renal transplantation at our institution 23 (14%) had previously undergone bladder augmentation. These patients were retrospectively compared (1:2 ratio) to 42 controls matched for gender, age, race, donor type, weight and immunosuppression protocol. The type of donor (living or cadaver), rate of acute tubular necrosis and cold ischemia time during transplantation were also similar between groups.

RESULTS

Mean followup was 18.0 +/- 13.9 months and 25.2 +/- 14.1 months for the augmented and nonaugmented bladder groups, respectively (p >0.05). The incidence of acute rejection within the first 12 months of kidney transplantation was 9% in the bladder augmentation group and 26% in controls (p >0.05). The rate of urinary tract infection or asymptomatic bacteriuria in the first 12 months after kidney transplantation was higher in the bladder augmentation group (19 patients, 83%) compared to controls (7 patients, 17%, p <0.001). Patients with augmented bladder had a higher number of hospital admissions (14 patients, 61%) compared to the control group (12 patients, 29%, p = 0.004). Despite the higher incidence of urinary tract infection in the augmented bladder group, there was no statistically significant difference in graft function between the groups at 6 months (1.1 +/- 0.3 mg/dl vs 1.0 +/- 0.3 mg/dl) or 12 months (1.0 +/- 0.2 mg/dl vs 1.2 +/- 0.7 mg/dl) after transplantation.

CONCLUSIONS

Our study demonstrated that patients with transplanted kidney and augmented bladder had more asymptomatic bacteriuria and urinary tract infections than those without bladder augmentation. However, the rate of graft survival was similar between the groups.

Etiology of urinary tract infection in scholar children

OBJECTIVE

To prospectively assess the prevalence of vesicourethral dysfunction in children over 3 years old, comparing it with the occurrence rate for other potential factors that cause urinary infection in this age range.

MATERIALS AND METHODS

36 girls and 9 boys were assessed, with mean age of 6.4 years, ranging from 3 to 13.9 years. These children were prospectively assessed regarding the presence of symptoms of lower urinary tract dysfunction. These data were compared with the retrospective assessment of other potential risk factors for urinary infection. Ultrasonography was performed in 28 children and voiding cystourethrogram was performed in 26 patients.

RESULTS

Vesicourethral dysfunction was diagnosed in 39 (87%) of the 45 children with urinary infection. Among these 39 patients, all had voiding urgency, 30 (77%) had urinary incontinence, 12 (31%) pollakiuria and 3 (8%) presented infrequent voiding. Vaginal discharge was evidenced in 8 (22%) girls and phimosis in 2 (22%) boys. Obstipation was diagnosed in 10 (22%) cases. Significant post-voiding residue was detected in 4 (13%) of the 28 cases assessed. Vesicoureteral reflux was evidenced in 5 (19%) of the 26 patients who underwent voiding cystourethrogram. In only 2 (4%) cases there was not an apparent cause for the infection.

CONCLUSION

Vesicourethral dysfunction is a major cause of urinary infection in children with ages above 3 years old. In cases where voiding dysfunction in not present, other predisposing factors must be assessed. However, only 4% of the patients did not present an apparent urologic cause for the infection.

Treatment of non-monosymptomatic nocturnal enuresis by transcutaneous parasacral electrical nerve stimulation

OBJECTIVE

To evaluate the effectiveness of transcutaneous parasacral electrical stimulation (TCPSE) in the treatment of non-monosymptomatic nocturnal enuresis (NMNE). Also, we evaluated possible pretreatment predictors of TCPSE failure.

MATERIALS AND METHODS

Nineteen children diagnosed with NMNE who underwent TCPSE were studied prospectively. There were 6 boys and 13 girls with a mean age of 9.05 ± 3.153 years (range 5-17 years). The sessions were performed three times per week for a maximum of 20 sessions, for 20 min each and at a frequency of 10 Hz.

RESULTS

For eight children (42%) the nocturnal enuresis resolved, four (21%) presented a reduction in nocturnal episodes to less than one a week, six (32%) presented no change and one (5%) had increased frequency of NMNE. Symptoms present before treatment, such as daytime incontinence, frequency, constipation and occurrence of urinary tract infection, were not predictors of failure after TCPSE.

CONCLUSION

TCPSE can be an effective treatment for NMNE, but about a third of patients will need another kind of treatment. No pretreatment factor was determined that predicted TCPSE failure.

Predictors of outcome in children and adolescents with overactive bladder treated with parasacral transcutaneous electrical nerve stimulation

BACKGROUND

Parasacral transcutaneous electrical nerve stimulation (TENS) has emerged as an effective treatment for overactive bladder (OAB) in view of its high success rates in improving lower urinary tract symptoms and constipation, with no direct side effects. However, the clinical characteristics associated with the outcomes remain to be established.

OBJECTIVE

The aim of this study was to evaluate potential predictors of outcome in children with OAB treated using parasacral TENS.

STUDY DESIGN

This was a prospective study of children with symptoms of isolated OAB, enrolled consecutively to the study and treated with parasacral TENS (figure). Isolated OAB was defined as the presence of urinary urgency with no signs of dysfunctional voiding. The symptoms were considered completely resolved when a patient's parents/guardians or the patients themselves reported a 100% improvement. Parasacral TENS was performed twice weekly for a total of 20 sessions of 20 min each at 10 Hz. The potential predictive factors evaluated were: sex, age, daytime incontinence, nocturia, a prior history of urinary tract infection, the presence of nocturnal enuresis, constipation and holding maneuvers.

RESULTS

Eighty-three patients with a mean age of 7.8 ± 2.8 years were included in the study. Complete resolution of symptoms was achieved in 47 (56.6%). Following parasacral TENS treatment, a significant response was reported in 96.4% of cases. Of the 55 patients with nocturnal enuresis, partial resolution was achieved in 30 cases (54.5%), with a statistically significant association between nocturnal enuresis and the patient's response to treatment (p < 0.004; OR = 4.4, 95% CI 1.5-12.5). No other factor was associated with response to treatment.

DISCUSSION

To the best of our knowledge, this association between nocturnal enuresis and failure to respond to parasacral TENS treatment for lower urinary tract dysfunction has not previously been reported. The identification of factors capable of predicting therapeutic failure may allow professionals to select those specific patients who would benefit from a multimodal approach in the treatment of this pathology, which has such a significant impact on the quality of life of affected patients.

CONCLUSIONS

Nocturnal enuresis was the only symptom associated with a poor outcome following parasacral TENS treatment in children with OAB.

Emotional and behavioral problems in children and adolescents with lower urinary tract dysfunction: a population-based study

BACKGROUND

An association has been found between lower urinary tract dysfunction (LUTD) and emotional and behavioral problems, particularly in cases of urinary incontinence. Other associated symptoms and the coexistence of functional constipation require further investigation.

OBJECTIVE

To assess whether emotional and behavioral problems are more common in children and adolescents with LUTD.

STUDY DESIGN

A multicenter, cross-sectional, population-based study conducted in public places. Parents answered questions on urinary and psychological symptoms in their children aged 5-14 years. Children/adolescents with neurological problems or anatomical urinary tract abnormalities were excluded. The Dysfunctional Voiding Scoring System was used for assessing urinary symptoms, the Rome III Diagnostic Criteria for evaluating bowel symptoms, and the Strengths and Difficulties Questionnaire (SDQ) for evaluating emotional and behavioral problems.

RESULTS

Of the 806 children/adolescents included, 53% were female. The mean age was 9.1 ± 2.7 years. The prevalence of LUTD was 16.4%. Overall, 26.2% had abnormal scores in the overall SDQ scale, 29.2% in the emotional problems subscale, and 30% in the conduct problems subscale. Of the children with LUTD, 40.5% screened positive for emotional/behavioral problems, with a significant association being found for the overall SDQ scale (P < 0.001) and for the emotional problems (P < 0.001), conduct problems (P < 0.001), and hyperactivity (P = 0.037) subscales. Urinary urgency, urinary incontinence, and voiding postponement were significantly associated with a greater prevalence of abnormalities in the overall SDQ score (P = 0.05; P = 0.004, and P = 0.012, respectively). Bladder and bowel dysfunction was an aggravator of emotional and behavioral problems, with more intense symptoms, both in the overall SDQ scale and in the subscales. In the multivariate analysis, the factors independently associated with the presence of emotional and behavioral problems were LUTD (odds ratio [OR] = 1.91), constipation (OR = 1.7), studying in a government-funded school (OR = 2.2), and poor education of the head of the family (OR = 1.9).

CONCLUSIONS

Children and adolescents with LUTD have more emotional and behavioral problems, with bladder and bowel dysfunction being an aggravating factor for this association.

Constipation in children with isolated overactive bladders

OBJECTIVE

To evaluate the prevalence of constipation in children with isolated overactive bladder (IOAB) and no micturition complaints.

MATERIALS AND METHODS

A questionnaire was used to evaluate constipation in 51 children with IOAB, as well as in a control group of 74 children between the ages of 4 and 14 years. The Rome III criteria for children were used to assess constipation. IOAB was defined as the presence of symptoms such as urgency with or without daytime incontinence or frequency, a bell-shaped uroflow, and no post-residual urine.

RESULTS

Mean patient ages were 7.94 (±2.8) and 8.28 (±3.4) years in the OAB and control group, respectively (p = 0.54). Twenty-eight (54.9%) of the OAB group were girls, and 34 (45.9%) were girls in the control group (p = 0.32). More of the children with IOAB had constipation than those without urinary symptoms (54.9% vs. 29.7%, p = 0.005; or 2.87, 95% CI: 1.3-6.0). The results were statistically significant regarding the following Rome III criteria: "history of stool retention", "presence of painful or hard bowel movements", "the presence of a large fecal mass in the rectum" and "large diameter stools which may obstruct the toilet". Within the group with OAB, constipation was more common among males (p = 0.05). There was no association between the type of OAB symptoms and constipation. The average dysfunctional voiding symptom score was 9.76 (±4.1). Eleven children (21.6%) presented alterations on ultrasound. Girls with OAB presented more frequently with UTI than boys (18 vs. 10, p = 0.13).

CONCLUSION

This was the first comparative study with respect to constipation in children with IOAB and without urinary symptoms. Children with IOAB have a greater risk of having constipation compared to those with no urinary symptoms.

Population-based study of pelvic lymph node positivity in clinically localized prostate cancer: a study comparing African Americans and whites

OBJECTIVES

To evaluate the correlation between race and lymph node metastasis for prostate cancer by analyzing which preoperative parameters may predict lymph node status in both races.

METHODS

We analyzed a group of patients (552 American white men [AWM] and 423 African-American men [AAM]) who underwent radical prostatectomy plus modified pelvic lymphadenectomy between January 1991 and June 1997. Patients who received neoadjuvant radiation or hormone therapy were excluded. Univariate and multivariate analyses were performed to determine the influence of race on lymph node positivity, as well as to correlate the preoperative parameters (serum prostate-specific antigen [PSA], biopsy Gleason score, and clinical stage) with lymph node metastasis for each race separately.

RESULTS

The AAM presented with significantly higher preoperative Gleason scores and PSA levels than AWM. However, comparing lymph node status by race, the difference of positivity (41 AWM [7.4% and 22 AAM [5.2%]) was not statistically significant (P = 0.16). The percentage of positive nodes was similar in both races for each subset of PSA, Gleason score, and clinical stage. Despite the statistical significance of the three preoperative parameters in univariate analysis, in multivariate analysis only PSA and Gleason score were independent predictors of positive lymph nodes.

CONCLUSIONS

There is no influence of race on lymph node metastasis, despite AAM presenting with higher preoperative Gleason scores and PSA levels. In multivariate analysis, preoperative Gleason score and PSA were independent factors for positive nodes regardless of race.

Prevalence of enuresis and daytime urinary incontinence in children and adolescents with sickle cell disease

PURPOSE

There is a known association between sickle cell disease and enuresis. However, the cause of this association is unclear. We tested the hypothesis that children with sickle cell disease would have more symptoms of overactive bladder than a control group.

MATERIALS AND METHODS

Questionnaires were distributed to 155 legal guardians of children and adolescents 5 to 17 years old with sickle cell disease and to 100 legal guardians of a control group of children.

RESULTS

Individuals with and without sickle cell disease were distributed uniformly regarding gender and age. A total of 50 patients (32.3%) in the sickle cell disease group had enuresis vs 5 (5%) in the control group (p = 0.000). Daytime urinary incontinence was observed in 36 individuals with (23.2%) and 11 (11.0%) without sickle cell disease (p = 0.014). A total of 52 patients with sickle cell disease (33.5%) complained of urgency, compared to 10 controls (10%, p = 0.000). A total of 49 patients with sickle cell disease (31.6%) had frequency, compared to 6 controls (6%, p = 0.000). Of all patients who reported enuresis or daytime incontinence only 1 with enuresis had received specific treatment.

CONCLUSIONS

There is a significant association between sickle cell disease and enuresis and overactive bladder symptoms such as daytime incontinence, urgency and frequency. Thus, all children and adolescents with sickle cell disease should be questioned regarding the presence of these symptoms to facilitate treatment for these conditions.