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  1. Article ; Online: Does negative retroperitoneal CT in adolescents with paratesticular rhabdomyosarcoma preclude the need of retroperitoneal lymph node dissection?

    Eulalio Damazio / Eliana Caran / Valdemar Ortiz / Antonio Macedo Junior

    Einstein (São Paulo), Vol 9, Iss 4, Pp 527-

    2011  Volume 529

    Abstract: We report on a 16-year-old male with paratesticular rhabdomyosarcoma who underwent retroperitoneal lymph node dissection due to a stage I tumor (normal retroperitoneal computed tomoghaphy). The surgical finding was three enlarged nodes, positive for ... ...

    Abstract We report on a 16-year-old male with paratesticular rhabdomyosarcoma who underwent retroperitoneal lymph node dissection due to a stage I tumor (normal retroperitoneal computed tomoghaphy). The surgical finding was three enlarged nodes, positive for metastatic disease. Patient was referred to adjuvant chemotherapy. This case suggests that the Intergroup Rhabdomyosarcoma Study Group IV protocol is subject to questions regarding adolescents with paratesticular rhabdomyosarcoma, and that negative retroperitoneal CT does not preclude the need of lymph node dissection.
    Keywords Rhabdomyosarcoma ; Testicular neoplasms ; Lymphadenectomy/methods ; Tomography ; x-ray computed ; Case reports ; Medicine ; R
    Language English
    Publishing date 2011-12-01T00:00:00Z
    Publisher Instituto Israelita de Ensino e Pesquisa Albert Einstein
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Impact of castration with or without alpha-tocopherol supplementation on the urethral sphincter of rats

    Mirian Kracochansky / Leonardo Oliveira Reis / Fabio Lorenzetti / Valdemar Ortiz / Miriam Dambros

    International Brazilian Journal of Urology, Vol 38, Iss 2, Pp 277-

    2012  Volume 283

    Abstract: OBJECTIVE: To analyze the impact of low levels of testosterone induced by orchiectomy and the effect of alpha-tocopherol supplementation on oxidative stress in the urethral sphincter. MATERIALS AND METHODS: Forty male Wistar rats weighing 250-300g were ... ...

    Abstract OBJECTIVE: To analyze the impact of low levels of testosterone induced by orchiectomy and the effect of alpha-tocopherol supplementation on oxidative stress in the urethral sphincter. MATERIALS AND METHODS: Forty male Wistar rats weighing 250-300g were divided into four groups with 10 each: Sham group; Orchiectomy group: bilateral orchiectomy; Orchiectomy-pre-Tocopherol group: bilateral orchiectomy preceded by alpha-tocopherol supplementation for four weeks; Orchiectomy-full-Tocopherol group: bilateral orchiectomy with alpha-tocopherol supplementation for four weeks preceding the procedure and for eight weeks afterwards. At the protocol end, animals were euthanized and had the sphincter analyzed stereologically focusing on collagen and muscle fibers percentage. Oxidative stress levels were determined using 8-epi-PGF2. RESULTS: The 8-epi-PGF2 levels were statistically higher (p < 0.0003) in the Orchiectomy group compared to others groups while Sham and Orchiectomy-full-Tocopherol groups presented statistically similar values (p = 0.52). Collagen volumetric densities were significantly lower in Sham and Orchiectomy-full-Tocopherol groups (p < 0.022). Sham group presented statistically greater muscle fiber percent. CONCLUSION: Castration caused oxidative stress in the urethral sphincter complex, with increased collagen deposition. Alpha-tocopherol had a protective effect and its supplementation for twelve weeks provided the greatest protection.
    Keywords apoptosis ; alpha-tocopherol ; oxidative stress ; antioxidants ; castration ; Diseases of the genitourinary system. Urology ; RC870-923 ; Specialties of internal medicine ; RC581-951 ; Internal medicine ; RC31-1245 ; Medicine ; R ; DOAJ:Urology ; DOAJ:Medicine (General) ; DOAJ:Health Sciences
    Subject code 610
    Language English
    Publishing date 2012-04-01T00:00:00Z
    Publisher Sociedade Brasileira de Urologia
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Influence of oxidative stress on inducing micturition dysfunction following chronic infravesical obstruction and the protective role of an antioxidant diet - association of in vivo and in vitro studies in rats

    Sérgio Bisogni / Fabio Thadeu Ferreira / Arnaldo Amstalden Neto / Leandro Oliveira Chiarelli / Valdemar Ortiz

    International Brazilian Journal of Urology, Vol 38, Iss 4, Pp 552-

    2012  Volume 560

    Abstract: OBJECTIVE: This study was developed to determine whether the generation of free radicals, induced by ischemia followed by reperfusion in a model of chronic intravesical obstruction in rats, would lead to damage in the detrusor. It also investigates the ... ...

    Abstract OBJECTIVE: This study was developed to determine whether the generation of free radicals, induced by ischemia followed by reperfusion in a model of chronic intravesical obstruction in rats, would lead to damage in the detrusor. It also investigates the possible protective action of the flavonoid galangin on the tissue lesion induced by lipid peroxidation. MATERIALS AND METHODS: Twenty-one male rats were divided into three groups of seven animals each. Group A was subjected to a sham procedure; group B to partial obstruction of the bladder neck; and group C to partial obstruction of the bladder neck, but also received a diet rich in the flavonoid galangin. All the animals were subjected to urodynamic evaluation and then sacrificed. The bladders were sent for enzymatic tests. RESULTS: The urodynamic showed that group B developed significantly greater numbers of involuntary contractions of the detrusor, greater post-micturition residue and lower compliance. The group A presented TEAC levels greater than to the group B. Comparative analysis of group A, B and C demonstrated significantly greater malondialdehyde levels in group B in relation to groups A and C. The group B presented smaller contraction amplitudes than did groups A and C, in electrically stimulated contractions. CONCLUSIONS: That oxidative stress is implicated in the damage to the detrusor musculature following a period of chronic intravesical obstruction. We show, for the first time, that administration of an antioxidant prior to and following the start of chronic obstruction makes it possible to avoid the cellular lesions that cause detrusor dysfunction.
    Keywords Urinary Bladder ; Oxidative stress ; Muscle Contraction ; Flavonoids ; Diseases of the genitourinary system. Urology ; RC870-923 ; Specialties of internal medicine ; RC581-951 ; Internal medicine ; RC31-1245 ; Medicine ; R ; DOAJ:Urology ; DOAJ:Medicine (General) ; DOAJ:Health Sciences
    Subject code 630
    Language English
    Publishing date 2012-08-01T00:00:00Z
    Publisher Sociedade Brasileira de Urologia
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Antioxidant supplementation decreases the cell death rate in the prostatic stromal tissue of long-term castrated rats

    Guilherme Fartes / Fábio Lorenzetti / Larissa Beloti Salvador / Valdemar Ortiz / Miriam Dambros

    International Brazilian Journal of Urology, Vol 38, Iss 3, Pp 419-

    2012  Volume 425

    Abstract: OBJECTIVE: The purpose of this study was to compare the effects of castration on cell death rate of the adult rat prostates and to evaluate the benefic action of alpha tocopherol supplementation to avoid apoptosis post-orchiectomy. MATERIAL AND METHODS: ... ...

    Abstract OBJECTIVE: The purpose of this study was to compare the effects of castration on cell death rate of the adult rat prostates and to evaluate the benefic action of alpha tocopherol supplementation to avoid apoptosis post-orchiectomy. MATERIAL AND METHODS: Thirty male Wistar rats weighing 250-300g were divided into three groups: group I - they were subjected to bilateral orchiectomy and sacrificed eight weeks after the procedure; group II - subjected to bilateral orchiectomy and alpha-tocopherol supplementation for four weeks preceding the procedure; and group III - subjected to bilateral orchiectomy and alpha-tocopherol supplementation for four weeks preceding the procedure and for eight weeks afterwards. At the end of the experiment, the prostatectomy was performed in all rats. The presence of oxidative stress was determined by assaying the blood level of 8-isoprostane and the occurrence of apoptosis was evaluated by identification of active caspase-3 through immunohistochemical analysis. RESULTS: The statistic analysis of active caspase-3 showed that in the long-term castrated group the detection was higher than in groups were the alpha-tocopherol was supplemented (p=0.007). Analysis of 8-isoprostane levels showed higher concentrations of reactive oxygen species in group I compared to other groups (p<0.05). Groups II and III presented active caspase-3 lower than in group I (p<0.05). CONCLUSION: Our exploratory analyses demonstrate a method to study the aging process and its influence on oxidative stress of prostatic tissue and cells death rate. Based on our results we can suggest that alpha tocopherol supplementation can decrease the apoptotic process as well as the oxidative stress levels induced by androgen deprivation of the prostate gland.
    Keywords Prostate ; Testosterone ; Oxidative Stress ; alpha-Tocopherol ; Apoptosis ; Diseases of the genitourinary system. Urology ; RC870-923 ; Specialties of internal medicine ; RC581-951 ; Internal medicine ; RC31-1245 ; Medicine ; R ; DOAJ:Urology ; DOAJ:Medicine (General) ; DOAJ:Health Sciences
    Subject code 610
    Language English
    Publishing date 2012-06-01T00:00:00Z
    Publisher Sociedade Brasileira de Urologia
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Human penile ossification

    Homero Oliveira de Arruda / Hudson de Lima / Valdemar Ortiz

    São Paulo Medical Journal, Vol 125, Iss 2, Pp 124-

    case report

    2007  Volume 125

    Abstract: CONTEXT: Ossification in the human penis is such a rare condition that only 34 histologically evident cases have previously been reported. Among several conditions that have been correlated with this problem the most frequent is Peyronie disease. In all ... ...

    Abstract CONTEXT: Ossification in the human penis is such a rare condition that only 34 histologically evident cases have previously been reported. Among several conditions that have been correlated with this problem the most frequent is Peyronie disease. In all these conditions, human penile ossification appears to be a metaplastic bone formation process. CASE REPORT: A 59-year-old white man presented with a one-year history of slight pain upon erection and during intercourse. He also complained of hard plaque near the base of the penis. One year earlier, he had sustained blunt trauma during intercourse. Examination of the penis revealed a fixed firm mass extending over the proximal third of the penile shaft, measuring 3.0 x 3.0 x 2.0 cm and involving the corporal sponge, without surface extension. There was no impotence or other relevant clinical finding. Radiography on the penis revealed irregular calcification in the same position as the palpable mass and in the septum of the proximal inner third of the penis. The importance of this report lies in the extent of the human penile ossification, as demonstrated by the radiological and histological confirmation.
    Keywords Penile induration ; Calcinosis ; Heterotopic ossification ; Penile diseases ; Penis ; Medicine ; R
    Language English
    Publishing date 2007-03-01T00:00:00Z
    Publisher Associação Paulista de Medicina
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: To circ or not to circ

    Yuri D. Nobre / Ricardo G. Freitas / Maria J. Felizardo / Valdemar Ortiz / Antonio Macedo Jr.

    International Brazilian Journal of Urology, Vol 36, Iss 1, Pp 75-

    clinical and pharmacoeconomic outcomes of a prospective trial of topical steroid versus primary circumcision

    2010  Volume 85

    Abstract: PURPOSE: To compare the efficacy and costs of circumcision versus topical treatment using a prospective pharmacoeconomic protocol. MATERIALS AND METHODS: We treated 59 patients (3-10 years of age) randomized into two groups: 29 underwent an 8-week course ...

    Abstract PURPOSE: To compare the efficacy and costs of circumcision versus topical treatment using a prospective pharmacoeconomic protocol. MATERIALS AND METHODS: We treated 59 patients (3-10 years of age) randomized into two groups: 29 underwent an 8-week course of topical treatment with 0.2% betamethasone-hyaluronidase cream twice a day; and 30 underwent circumcision. Topical treatment success was defined as complete exposure of the glans. In cases of treatment failure, circumcision was performed and its cost imputed to that of the initial treatment. The pharmacoeconomic aspects were defined according to the Brazilian National Public Health System database and the Brazilian Community Pharmacies Index. RESULTS: The two groups were statistically similar for all clinical parameters evaluated. Topical treatment resulted in complete exposure of the glans in 52% of the patients. Topical treatment was associated with preputial pain and hyperemia. However, treatment suspension was unnecessary. Minor complications were observed in 16.6% of the surgical group patients. The mean cost per patient was US$ 53.70 and US$ 125.20, respectively, for topical steroid treatment (including the costs related to treatment failure) and circumcision. The total costs were US$ 2,825.32 and US$ 3,885.73 for topical treatment and circumcision, respectively. CONCLUSIONS: Topical treatment of phimosis can reduce costs by 27.3% in comparison with circumcision. Therefore, topical treatment of phimosis should be considered prior to the decision to perform surgery.
    Keywords phimosis ; circumcision ; male ; steroids ; pharmacoeconomics ; Diseases of the genitourinary system. Urology ; RC870-923 ; Specialties of internal medicine ; RC581-951 ; Internal medicine ; RC31-1245 ; Medicine ; R ; DOAJ:Urology ; DOAJ:Medicine (General) ; DOAJ:Health Sciences
    Subject code 616
    Language English
    Publishing date 2010-02-01T00:00:00Z
    Publisher Sociedade Brasileira de Urologia
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Cloacal Exstrophy

    Antonio Macedo Jr / Atila Rondon / Ricardo Frank / Herick Bacelar / Bruno Leslie / Sergio Ottoni / Gilmar Garrone / Riberto Liguori / Valdemar Ortiz

    International Brazilian Journal of Urology, Vol 39, Iss 6, Pp 897-

    a complex disease

    2013  Volume 898

    Abstract: Introduction Cloacal exstrophy is a rare occurrence with an incidence of 1:200,000 to 1:400,000 live births. It represents one of the most challenging reconstructive endeavors faced by pediatric surgeons and urologists. Aside from the genitourinary ... ...

    Abstract Introduction Cloacal exstrophy is a rare occurrence with an incidence of 1:200,000 to 1:400,000 live births. It represents one of the most challenging reconstructive endeavors faced by pediatric surgeons and urologists. Aside from the genitourinary defects, there are other associated anomalies of the gastrointestinal, musculoskeletal and neurological systems that require a multidisciplinary approach when counseling anxious parents. Material and Methods We present a video of a patient with cloacal exstrophy treated with 21 days of life. Surgery consisted of separation and tubularization of the cecal plate from the exstrophied bladder halves and colostomy construction. The bladder was closed primarily and umbilical scar reconstructed and used for ureteral and cistostomy drainage. A urethral catheter was used to guide bladder neck tubularization. A final epispadic penis was obtained and planned for further repair in a second step. Results The patient had an initial uneventful postoperative course and immediate outcome was excellent. The bladder healed nicely but patient presented with abdominal distension in the 5th day of postoperative setting requiring parenteral nutrition. The distal colon persisted with lower diameter although non obstructive, but causing difficulty for fecal progression. Continuous colostomy dilatation and irrigation were required. Conclusions Approximating the bladder halves in the midline at birth and primary bladder closure is a viable option, intestinal transit may be a issue of concern in the early postoperative follow-up.
    Keywords Diseases of the genitourinary system. Urology ; RC870-923 ; Specialties of internal medicine ; RC581-951 ; Internal medicine ; RC31-1245 ; Medicine ; R
    Subject code 616
    Language English
    Publishing date 2013-12-01T00:00:00Z
    Publisher Sociedade Brasileira de Urologia
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Keratinized versus non-keratinized preputial flap onlay urethroplasty

    Marnio Costa / Bruno Leslie / Atila Rondon / Herick Bacelar / Ricardo Mattos / Bruno Barbosa / Rosana Delcelo / Valdemar Ortiz / Antonio Macedo Jr

    International Brazilian Journal of Urology, Vol 39, Iss 6, Pp 884-

    does it make any difference in the histological analysis? An experimental study in rabbits

    2013  Volume 892

    Abstract: Purpose To compare the histological characteristics of keratinized versus non-keratinized onlay island flaps in an experimental rabbit model. Materials and Methods Sixteen male rabbits were randomly allocated into two experimental groups: keratinized and ...

    Abstract Purpose To compare the histological characteristics of keratinized versus non-keratinized onlay island flaps in an experimental rabbit model. Materials and Methods Sixteen male rabbits were randomly allocated into two experimental groups: keratinized and non-keratinized onlay island flaps. A defect was created in the ventral aspect of the penile urethra. In the keratinized group, a longitudinal island flap was harvested from the external prepuce and rotated to cover the urethral defect. In the non-keratinized group a transverse island flap was harvested from the inner prepuce. The animals were sacrificed after 2, 4, 8 and 12 weeks. Results The flaps were viable in all animals, and no deaths were associated with the procedure. Two urethrocutaneous fistulas were identified, one in each experimental group. A similar pattern of fibrosis was identified in both groups. The keratinized epithelium of the external prepuce kept its histological aspect and keratin production. Both keratinized and non-keratinized groups presented a slight decrease on the epithelial thickness, however without a statistically significant difference between groups. Conclusions In this short-term rabbit model, we observed that the stratified squamous keratinized epithelium from the external prepuce kept its keratin production. There was no statistical influence of the flap type on the mean epithelial thickness.
    Keywords Hypospadias ; Surgical Flaps ; Foreskin ; Keratins ; Urethra ; Diseases of the genitourinary system. Urology ; RC870-923 ; Specialties of internal medicine ; RC581-951 ; Internal medicine ; RC31-1245 ; Medicine ; R
    Subject code 630
    Language English
    Publishing date 2013-12-01T00:00:00Z
    Publisher Sociedade Brasileira de Urologia
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Effects of repeated extracorporeal shock wave in urinary biochemical markers of rats Avaliação dos fatores bioquímicos urinários de risco para nefrolitíase em ratos submetidos à aplicação repetida de ondas de choque eletro-hidráulicas

    Márcio Carvalho / Luiz Gonzaga de Freitas Filho / Maurício Carvalho / Djalma José Fagundes / Valdemar Ortiz

    Acta Cirurgica Brasileira, Vol 24, Iss 6, Pp 496-

    2009  Volume 501

    Abstract: PURPOSE: To access the effect of repeated extracorporeal shock wave (ESW) on urinary biochemical markers METHODS: 20 rats were assigned for ESW (Direx Tripter X1® - 14 KV) to one of two groups: G1 (n=10) one ESW; G2 (n=10) two ESWs within a 14-day ... ...

    Abstract PURPOSE: To access the effect of repeated extracorporeal shock wave (ESW) on urinary biochemical markers METHODS: 20 rats were assigned for ESW (Direx Tripter X1® - 14 KV) to one of two groups: G1 (n=10) one ESW; G2 (n=10) two ESWs within a 14-day interval. Within the twenty-four hour period before and after the application of shock waves, the animals were placed in metabolic cages for 24 hour urine collection. The ph, creatinine, sodium, potassium, chlorides, calcium, magnesium, phosphorus, oxalates, alkaline phosphatase and citrates were measured. Twenty-four hours after the material was collected for urinary determination, the animals underwent nephrectomy of the kidney submitted to the ESW applications and were, then, sacrificed. The kidneys were processed for hispatological examination. RESULTS: Small variations in the biochemical markers were found in both groups, with no significant differences between the values obtained either prior to or following the ESW applications, except for citrate and alkaline phosphatase. Citraturia decreased significantly in group 2, following the second ESWL application (24.8 ± 3.0 mg/day after the first ESWL vs. 15.3 ± 2.2 mg/day after the second ESWL; p < 0.05). Alkaline phosphatase increased significantly following ESWL in group I (0.57 ± 0.02 vs. 0.79 ± 0.04 µmol/mg creatinine; p < 0.01) and also in group 2 (0.69 ± 0.05 vs. 0.83 ± 0.03 µmol/mg creatinine; p < 0.05). Glomerular, interstitial and sub-capsular hemorrhage with perivascular edema was found in the animals in both groups studied. CONCLUSIONS: A significant increase in urinary alkaline phosphatase was found in both groups studied, suggesting a proximal tubule lesion. In the group of rats undergoing more than one ESWL application, a smaller urinary citrate excretion was noticed, which may be a factor contributing for the formation of new calculi. OBJETIVO: Avaliar os efeitos renais das ondas de choque eletro-hidráulicas (OCEH), utilizando como parâmetros marcadores bioquímicos urinários. MÉTODOS: Foram utilizados 20 ratos machos, EPM - Wistar, distribuídos aleatoriamente em dois grupos: G1 (n=10) Animais submetidos a uma sessão de OCEH. G2 (n=10) Animais submetidos a duas sessões de OCEH separadas por um intervalo de 14 dias. Para coleta da urina os animais foram mantidos em gaiolas metabólicas 24 horas antes e depois da aplicação das OCEH. Foram medidos o pH, a creatinina, sódio, potássio, cloretos, cálcio, magnésio, fósforo, oxalato, fosfatase alcalina e citrato. Vinte e quatro horas após a coleta da urina os animais foram submetidos à nefrectomia do rim envolvido no experimento e, em seguida, sacrificados. Os rins foram então submetidos aos procedimentos de fixação e coloração histológica com hematoxilina e eosina. RESULTADOS: Pequenas variações nos marcadores bioquímicos foram detectadas nos dois grupos, sem diferenças significantes nos valores obtidos antes e após a aplicação das OCEH, exceto para os valores urinários de citrato e fosfatase alcalina. A citratúria diminuiu significantemente nos animais do Grupo 2 após a segunda aplicação das OCEH( 24,8 ± 3,0 mg/dia após a primeira sessão de OCEH e 15,3 ± 2,2 mg/dia após a segunda sessão de OCEH; p < 0.05). A fosfatase alcalina urinária aumentou de forma significante no grupo 1 após a sessão de OCEH (0,57 ± 0,02 vs. 0,79 ± 0,04 µmol/mg de creatinina; p < 0,01) e também no grupo 2 (0,69 ± 0,05 vs. 0,83 ± 0,03 µmol/mg de creatinina; p < 0,05). Os achados histológicos observados nos animais dos dois grupos foram: hemorragia glomerular, intersticial e subcapsular, acompanhada de edema perivascular. CONCLUSÕES: Observou-se um aumento significante da fosfatase alcalina urinária nos dois grupos estudados, sugerindo uma lesão dos túbulos proximais causada pelas ondas de choque eletro-hidráulicas. Nos animais submetidos a mais de uma sessão de OCEH observou-se um discreto aumento na excreção urinária de citrato, o que pode ser um fator que pode contribuir para a formação de novos cálculos.
    Keywords Doenças Urológicas ; Litíase ; Litotripsia ; Marcadores Bioquímicos ; Ratos ; Urologic Diseases ; Lithiasis ; Lithotripsy ; Biological Markers ; Rats ; Surgery ; RD1-811 ; Medicine ; R ; DOAJ:Surgery ; DOAJ:Medicine (General) ; DOAJ:Health Sciences
    Language English
    Publishing date 2009-12-01T00:00:00Z
    Publisher Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: A new extra-abdominal channel alternative to the mitrofanoff principle

    Antonio Macedo Jr. / Tiago Rosito / Jesus A. S. Pires / Riberto Liguori / Valdemar Ortiz

    International Brazilian Journal of Urology, Vol 35, Iss 2, Pp 205-

    experimental and preliminary clinical experience

    2009  Volume 216

    Abstract: INTRODUCTION: The appendix is the gold-standard channel for the Mitrofanoff principle in pediatric urology, but the search for alternatives is justified considering it may not be available or preferably used for colonic stomas (Malone antegrade ... ...

    Abstract INTRODUCTION: The appendix is the gold-standard channel for the Mitrofanoff principle in pediatric urology, but the search for alternatives is justified considering it may not be available or preferably used for colonic stomas (Malone antegrade continence enema). The aim of this study is to report on technical feasibility of a new approach for creating catheterizable channels in a rabbit model and to present our preliminary clinical experience. MATERIAL AND METHODS: We configured a tube from two rectangular skin flaps 1x4 cm opposite each other in the middle line of the lower inferior abdomen. The channel was anastomosed to the bladder dome with embedding sutures to create a valvular mechanism. The experimental study consisted of 12 rabbits, divided in 4 groups according to the sacrifice schedule at 2, 4, 8 and 12 weeks. At 30th postoperative day, an urodynamic evaluation was performed to record continence of the stoma. A histological analysis of the specimens stained with hematoxylin-eosin, Masson trichrome and Picrosirius red was also done in group 2 (sacrifice at 4 weeks postoperatively). We used this method in 3 patients with congenital non-neurogenic bladder disease presenting with massive residual volumes without compliance deficits. RESULT: The technique proved feasible in all animals, 9 of 12 could be easily catheterized and underwent urodynamic study. No stoma leakage was observed in 7 animals at high bladder pressures (> 50 cm H20) and only 2 animals had some leakage at 40 cm H20. Urodynamics performed through the stoma showed urethral leakage at 20 cm H20, therefore demonstrating the efficacy of the valvular mechanism. Histological analysis confirmed good integration between the tube and the bladder. Mean follow-up of the clinical series (3 patients) was 7.2 months. Two patients remained continent up to 4 hours, whereas 1 patient had some leakage after 2 hours. CONCLUSION: We were able to confirm feasibility of a new extra-abdominal channel based on the Mitrofanoff principle and successfully reproduced the method in a clinical setting. Follow-up was short and long term results are required before any conclusive judgment can be made.
    Keywords bladder ; children ; urinary diversion ; Mitrofanoff principle ; surgery ; Diseases of the genitourinary system. Urology ; RC870-923 ; Specialties of internal medicine ; RC581-951 ; Internal medicine ; RC31-1245 ; Medicine ; R ; DOAJ:Urology ; DOAJ:Medicine (General) ; DOAJ:Health Sciences
    Subject code 630
    Language English
    Publishing date 2009-04-01T00:00:00Z
    Publisher Sociedade Brasileira de Urologia
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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