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1.
J Pediatr Urol ; 19(4): 467.e1-467.e7, 2023 08.
Artículo en Inglés | MEDLINE | ID: mdl-37012105

RESUMEN

INTRODUCTION: The ureteral diameter ratio (UDR) is reported to be effective in predicting the outcomes of vesicoureteral reflux (VUR) in several studies. OBJECTIVE: The objective of the current study was to compare the risk of scarring in patients with VUR relative to UDR and the VUR grade. We also aimed to demonstrate other associated risk factors in scarring and investigate the long-term complications of VUR and their relationship with UDR. STUDY DESIGN: Patients diagnosed with primary VUR were retrospectively enrolled in the study. UDR was calculated by dividing the largest ureteral diameter (UD) by the distance between L1-L3 vertebral bodies. Demographic and clinical data, laterality, VUR grade, UDR, delayed upper tract drainage on voiding cystourethrogram, recurrent urinary tract infections (UTI), and long-term complications of VUR were compared between the patients with and without renal scars. RESULTS: A total of 127 patients and 177 renal units were included in the study. There was a significant difference between the patients with and without renal scars according to age at diagnosis, bilaterality, reflux grade, UDR, recurrent UTI, bladder bowel dysfunction, hypertension, decreased estimated glomerular filtration rate, and proteinuria. The logistic regression analysis revealed that UDR had the highest odds ratio among the factors affecting scarring in VUR. DISCUSSION: VUR grading based on the evaluation of the upper urinary tract is one of the most important predictors for treatment options and prognosis. However, it is more likely to reflect ureterovesical junctional anatomy and function, which play a crucial role in the pathogenesis of VUR. CONCLUSION: UDR measurement seems to be an objective method that can help clinicians predict renal scarring in patients with primary VUR.


Asunto(s)
Uréter , Infecciones Urinarias , Reflujo Vesicoureteral , Humanos , Lactante , Reflujo Vesicoureteral/diagnóstico , Cicatriz/etiología , Estudios Retrospectivos , Uréter/patología , Ureteroscopía/métodos , Infecciones Urinarias/diagnóstico
2.
Pediatr Int ; 65(1): e15488, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36705322

RESUMEN

BACKGROUND: Solitary kidney (SK) affects 1/1000 people worldwide, and there are controversies concerning renal outcomes in these patients. This study aimed to investigate clinical findings and renal outcomes in children with SK and to compare the results for congenital (CSK) and acquired SK (ASK) groups. METHODS: The study included patients that presented to our pediatric nephrology department with SK between January 2010 and January 2021. Demographic and clinical data were recorded retrospectively. RESULTS: Of the 101 patients with SK, 71 had CSK (55 had unilateral renal agenesis and 16 had a multicystic dysplastic kidney) and 30 had ASK (17 had previously undergone unilateral nephrectomy due to a renal tumor and 13 had urological structural anomalies). There were nine patients (9%) with renal injury. The serum uric acid level was significantly higher and the estimated glomerular filtration rate was significantly lower in the patients with ASK compared with those with CSK (p = 0.005 and p < 0.001, respectively). There was a positive correlation between renal injury and the uric acid level (p < 0.001, r = 0.45). CONCLUSION: In addition to the management of blood pressure and proteinuria, it is important to control uric acid levels in patients with SK, especially those with ASK, to prevent renal injury. The ASK group has a greater risk of renal injury than the CSK group. There is a need for new markers to predict early stage renal damage in SK.


Asunto(s)
Riñón Único , Niño , Humanos , Riñón Único/complicaciones , Riñón Único/congénito , Ácido Úrico , Estudios de Seguimiento , Estudios Retrospectivos , Riñón/anomalías
3.
Urology ; 148: 243-249, 2021 02.
Artículo en Inglés | MEDLINE | ID: mdl-33080256

RESUMEN

OBJECTIVE: To report current results of a new surgical technique, tubularized reconstructed plate urethroplasty (TRPU) in distal hypospadias repair which allows the tubularization of urethral plate without incision or grafting. METHODS: This study is a prospective single surgeon series. Between January 2019 and March 2020, total of 158 patients underwent hypospadias repair, and 29 selected patients had TRPU procedure. Demographic data, duration of follow-up, complications were recorded. A vertical incision is made starting from halfway up the glans. This incision creates a diamond like defect which enables wedge removal of a segment of spongiosum tissue from the base of urethral plate extending to the hypospadiac meatus. Vertical incision is closed horizontally. The urethral plate is stretched and loosened from the base and re-secured into its bed using quilting stitches. Reconstructed urethral plate ensures the required width to allow the formation of neourethra of adequate circumference, followed by a formal glansplasty. RESULTS: Preoperative glans width was 13.4 ± 0.9 mm, urethral plate width was 6.1 ± 0.9 mm. Mean postoperative follow-up period was 13.6 months. All patients had successful functional outcome and cosmetically satisfying appearance. None of the patients required meatal calibration. The total complication rate was 3.4%. CONCLUSION: Native urethral plate itself is used as a natural flap to increase the surface area of the urethral plate in this new perspective of urethroplasty method. We believe that TRPU procedure provides an alternative approach for the formation of neourethra and it is a successful and relatively simple procedure with low complication rates, good cosmetic results and promising successful functional short-term outcome.


Asunto(s)
Hipospadias/cirugía , Uretra/cirugía , Niño , Preescolar , Humanos , Hipospadias/patología , Lactante , Masculino , Estudios Prospectivos , Resultado del Tratamiento , Procedimientos Quirúrgicos Urológicos Masculinos/métodos
4.
Urology ; 149: 268-269, 2021 03.
Artículo en Inglés | MEDLINE | ID: mdl-33347903
5.
Turk J Pediatr ; 62(4): 690-693, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32779427

RESUMEN

BACKGROUND: Xanthogranulomatous pyelonephritis is characterized by the inflammatory destruction of the renal parenchyma and intensive renal fibrosis. It is named because of its pathological appearance; that of its granulomatous inflammatory process with lipid-laden macrophages, which appear yellow, hence `xantho` which is Greek for yellow. Xanthogranulomatous pyelonephritis is predominantly a disease of adults. In children it is diagnosed sporadically and is extremely rare in infants. The age of onset varies (21 days to 16 years), although 60-75% of cases have been diagnosed before 5 years of age. Recurrent urinary tract infections, obstructive nephropathy caused by renal calculus, malnutrition, abnormal lipid metabolism, altered immunologic response, lymphatic blockage, congenital urinary anomalies have been implicated in the etiology of xanthogranulomatous pyelonephritis in children. CASE: We report an unusual case of xanthogranulomatous pyelonephritis in a 5-year-old girl and discuss its clinical features, histopathological findings and treatment. In this article, we also emphasized the importance of diagnostic imaging in urinary tract infections which enabled us not to miss the underlying kidney stone disease. CONCLUSION: Nephrolithiasis may lead to very serious conditions such as xanthogranulomatous pyelonephritis. This condition can be easily diagnosed by ultrasound, but if not detected, it can lead to complete loss of renal function as in the case.


Asunto(s)
Cálculos , Pielonefritis Xantogranulomatosa , Adulto , Niño , Preescolar , Femenino , Humanos , Lactante , Riñón , Pielonefritis Xantogranulomatosa/complicaciones , Pielonefritis Xantogranulomatosa/diagnóstico , Tomografía Computarizada por Rayos X , Ultrasonografía
6.
J Pediatr Genet ; 9(2): 114-116, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32341815

RESUMEN

Xanthogranulomatous pyelonephritis (XGP) is characterized by destruction of the renal parenchyma and granulomatous inflammation with lipid-laden foamy macrophages as well as inflammatory infiltration and intensive renal fibrosis. It generally occurs in adults, especially those in the fifth and sixth decades of life, but is occasionally seen in children as well. Brachydactyly mental retardation (BDMR) syndrome (OMIM 600430) is caused by a small deletion of chromosome 2q37 and is a rare condition, with roughly 100 cases reported worldwide. Here, we describe the case of a patient with deletion of chromosome 2q37, which is known as the BDMR syndrome, and XGP.

7.
Saudi Med J ; 37(7): 737-43, 2016 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-27381532

RESUMEN

OBJECTIVES: To compare pathological samples obtained from cases that underwent surgery for ureteropelvic junction (UPJ) obstruction with samples obtained during autopsies of subjects.  METHODS: Retrospectively, 42 patients who had undergone surgery due to UPJ obstruction (group 1) were included in the study. Histopathological and immunohistochemical features for sonic hedgehog (SHH), TBX18, and TSHZ3 of UPJ were evaluated and findings were compared with 20 autopsy cases (group 2).  RESULTS: In group 1, the scores were statistically significantly higher in terms of cytoplasmic SHH, nuclear TBX18, cytoplasmic and nuclear TSHZ3 staining. Statistically, no correlation was found between age and the staining scores belonging to these 3 antibodies in group 1 and group 2. Intense inflammation was found to be related with nuclear staining for TBX18.  CONCLUSION: Gene product expressions of SHH, TBX18 and TSHZ3 are statistically higher in patients with UPJ obstruction, when compared with control group. The explanation may be the reactivation of the processes, which had shown their effects in the embryological period, due to the chronic inflammation and long-term micro-trauma created by the disease.


Asunto(s)
Proteínas Hedgehog/metabolismo , Proteínas de Homeodominio/metabolismo , Proteínas de Dominio T Box/metabolismo , Obstrucción Ureteral/metabolismo , Humanos , Inmunohistoquímica
8.
Int J Surg ; 13: 137-141, 2015 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-25498492

RESUMEN

OBJECTIVE: The aim of the present study is to investigate the effect of Nissen fundoplication to the pacemaker cells of an intestinal system and the serotonin receptors on an ICC membrane. METHODS: Sixteen adult male rats were taken into study. Rats were divided in to the following two groups. Nissen fundoplication was performed to study group (Group 1) and no surgical procedures were applied to control group (group 2). The rats who were subjected to surgery and the rats without surgery were sacrificed on to postoperative 14 days. Specimens for the pathologic analysis were obtained from upper esophagus (group A) and esophagogastric junction (EGJ) (group B). Distribution of ICC and 5HT-3A were evaluated separately. RESULTS: There was a significant difference (p=0.01, p=0.02, respectively) regarding number of cells stained with CD117 between the group 1B-2B and group 2A-2B. Also there was a significant difference between (p=0.01, p=0.01 respectively) number of cells stained with 5HT-3A in groups 1A-1B and 2A-2B. However, no correlation was detected between group 1B-2B for 5HT-3A. CONCLUSION: A reduction in the number of ICC was observed in esophagogastric junctions of the fundoplication group but 5HT-3A distribution did not show a significant difference. A decrease in the number of ICC may be effective at postfundoplication dysphagia.


Asunto(s)
Trastornos de Deglución/etiología , Unión Esofagogástrica/patología , Fundoplicación/efectos adversos , Células Intersticiales de Cajal/fisiología , Proteínas Proto-Oncogénicas c-kit/metabolismo , Receptores de Serotonina 5-HT3/metabolismo , Animales , Trastornos de Deglución/prevención & control , Unión Esofagogástrica/metabolismo , Masculino , Ratas , Ratas Wistar
9.
European J Pediatr Surg Rep ; 2(1): 54-7, 2014 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-25755972

RESUMEN

Inflammatory myfibroblastic tumor (IMT), also known as inflammatory pseudotumor is unusual, benign solid tumor. This tumor is commonly reported in the lungs but can be present in extrapulmonary sites as well. We present the case of a 7-year-old girl with IMT in an unusual location. The patient was admitted with abdominal pain, and ultrasound showed a solid mass in the abdomen. She was operated and colocolic intussusception secondary to a mass was found. Histologic evaluation of mass revealed IMT.

10.
Clin Biochem ; 43(15): 1236-40, 2010 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-20713036

RESUMEN

OBJECTIVES: The aim of the present study is to investigate the effect of obesity on testicular function by evaluating reproductive hormones, inhibinB, insulin-like 3(INSL3), and leptin, in obese and non-obese adolescents according to pubertal Tanner stages. DESIGN AND METHODS: Eighty adolescent boys were grouped (n=20) as; Group1: obese-Tanner2, Group2: non-obese-Tanner2, Group3: obese-Tanner4, Group4: non-obese-Tanner4. Serum INSL3, luteinizing hormone, follicle-stimulating hormone, total testosterone, free testosterone, estradiol, sex hormone binding globulin, inhibin B and leptin levels were assessed in all groups. RESULTS: INSL3 levels were significantly lower in obese adolescents compared to non-obese boys (p=0.003, Tanner2) and (p=0.031, Tanner4). There was a negative correlation between INSL3 and leptin (r=-0.468, p=0.001). The negative correlation between INSL3 and BMISDS indicates that pubertal obesity leads to Leydig cell impairment. CONCLUSIONS: This study demonstrated for the first time in the literature that obesity effects testicular Leydig cell function starting from Tanner stage 2.


Asunto(s)
Inhibinas/sangre , Insulina/sangre , Leptina/sangre , Obesidad/sangre , Obesidad/fisiopatología , Pubertad/sangre , Testículo/fisiopatología , Adolescente , Índice de Masa Corporal , Estudios de Casos y Controles , Niño , Humanos , Hormona Luteinizante/sangre , Masculino , Proteínas , Testosterona/sangre
11.
Can Urol Assoc J ; 3(5): E69-73, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19829724

RESUMEN

INTRODUCTION: In this study, we define the characteristics of perfusion computed tomography (CT) in an experimental model of testicular torsion. METHODS: Twenty male Sprague-Dawley rats were included for the study. Torsion was applied to 10 rats and perfusion CT was performed in the first hour to evaluate the following perfusion parameters: blood flow (BF), blood volume (BV) and time to peak (TTP) values. Detorsion was done for the same rats, and perfusion CT was repeated 2 hours later to evaluate reperfusion. Ten rats were left as part of the control group. RESULTS: There is significant statistical correlation between the BF and BV values in the torsion and control groups (p=0.001 and p=0.001, respectively). There is no statistical correlation of the TTP parameters between the groups. No correlation was found between torsion and detorsion perfusion parameters. CONCLUSION: Perfusion CT can demonstrate the testicular perfusion insult in an experimental model of torsion. Perfusion CT may be an alternative method for diagnosis of torsion in indeterminate cases. Following detorsion an interval of 2 hours is not sufficient for demonstrating luxury perfusion of the testis.

12.
Can Urol Assoc J ; 3(5): 383-6, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19829731

RESUMEN

INTRODUCTION: In this study, we define the characteristics of perfusion computed tomography (CT) in an experimental model of testicular torsion. METHODS: Twenty male Sprague-Dawley rats were included for the study. Torsion was applied to 10 rats and perfusion CT was performed in the first hour to evaluate the following perfusion parameters: blood flow (BF), blood volume (BV) and time to peak (TTP) values. Detorsion was done for the same rats, and perfusion CT was repeated 2 hours later to evaluate reperfusion. Ten rats were left as part of the control group. RESULTS: There is significant statistical correlation between the BF and BV values in the torsion and control groups (p = 0.001 and p = 0.001, respectively). There is no statistical correlation of the TTP parameters between the groups. No correlation was found between torsion and detorsion perfusion parameters. CONCLUSION: Perfusion CT can demonstrate the testicular perfusion insult in an experimental model of torsion. Perfusion CT may be an alternative method for diagnosis of torsion in indeterminate cases. Following detorsion an interval of 2 hours is not sufficient for demonstrating luxury perfusion of the testis.

13.
J Pediatr Surg ; 44(10): 1977-83, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19853758

RESUMEN

BACKGROUND/PURPOSE: Perfusion imaging redefines computed tomography (CT) as a technique that can now depict vascular physiology in addition to detailed anatomy. The major clinical applications of perfusion CT are in acute stroke and oncology. Currently, there are very limited data on the application of perfusion CT in urology. The aim of the present study is to investigate the potential value of perfusion CT in anatomic and functional evaluation of obstruction in a single session on experimental hydronephrosis model in rats. Thus, we evaluate the perfusion CT in a new clinical application. METHODS: Twenty-eight rats were randomly allocated into 4 groups each consisting of 7 rats. At the third week of experimental intervention, postoperative renogram curves and perfusion parameters of the right kidneys' cortex and pelvis were assessed by CT. The right ureter was sutured as proximal complete obstruction in group 1, as distal complete obstruction in group 2, and as proximal partial obstruction in group 3. Group 4 served as the sham control group. Computed tomography was performed with single-slice tomography. Dynamic examination was performed with the help of perfusion software through contrast-enhanced tomography examination. RESULTS: In all study groups, the aorta time/density curves showed a rapid increase after a rapid decrease, and the duration to reach peak concentration in the normal kidney cortex was observed to be later than the aorta as expected. In groups 1, 2, and 3, the duration to reach peak concentration lengthened and the peak concentration values decreased. The time/density curves gradually increased as a result of the accumulation of the contrast agent in the pelvis, and a peak was observed at the end of the procedure in all study groups. In groups 1, 2, and 3, a statistically significant decrease (P = .01, P = .01, and P = .01, respectively) was observed in the peak concentration values of the contrast agent in comparison to group 4. The flow and blood volume values gradually decreased as the grade of the obstruction increased and the localization of the obstruction or grade of obstruction moved closer to the kidney. CONCLUSION: In conclusion, perfusion CT technique, performed in a single session, is a useful method for anatomic visualization, together with functional evaluation, in the diagnosis of ureteric obstructive pathology of experimental hydronephrosis model.


Asunto(s)
Riñón/diagnóstico por imagen , Riñón/patología , Imagen de Perfusión/métodos , Tomografía Computarizada por Rayos X/métodos , Obstrucción Ureteral/diagnóstico , Obstrucción Ureteral/patología , Animales , Medios de Contraste , Modelos Animales de Enfermedad , Hidronefrosis/diagnóstico por imagen , Hidronefrosis/patología , Aumento de la Imagen , Procesamiento de Imagen Asistido por Computador/métodos , Imagenología Tridimensional , Riñón/irrigación sanguínea , Corteza Renal/diagnóstico por imagen , Pelvis Renal/diagnóstico por imagen , Renografía por Radioisótopo/métodos , Distribución Aleatoria , Ratas , Ratas Wistar , Circulación Renal/fisiología , Uréter/diagnóstico por imagen , Uréter/patología , Obstrucción Ureteral/diagnóstico por imagen
14.
Turk J Pediatr ; 50(5): 509-11, 2008.
Artículo en Inglés | MEDLINE | ID: mdl-19102062

RESUMEN

TAR syndrome is a congenital malformation syndrome characterized by bilateral absence of the radius and thrombocytopenia. The known urinary anomalies are duplex ureter, dilatation of renal pelvis, horseshoe kidney and functional problems like vesicoureteral reflux and pyelonephritis. In this report of a case with TAR syndrome, a kidney stone and bladder telangiectasia were found coincidentally during the investigation of hematuria. TAR syndrome is discussed in the light of the medical literature. To our knowledge, no case has been reported demonstrating nephrolithiasis and bladder telangiectasia in TAR patients.


Asunto(s)
Cálculos Renales/etiología , Radio (Anatomía)/anomalías , Telangiectasia/etiología , Trombocitopenia/complicaciones , Enfermedades de la Vejiga Urinaria/etiología , Niño , Cistoscopía , Diagnóstico Diferencial , Humanos , Cálculos Renales/diagnóstico , Masculino , Síndrome , Telangiectasia/diagnóstico , Trombocitopenia/congénito , Trombocitopenia/diagnóstico , Enfermedades de la Vejiga Urinaria/diagnóstico
15.
Int J Pediatr Otorhinolaryngol ; 71(3): 409-14, 2007 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-17161874

RESUMEN

OBJECTIVE: During childhood, recent repeated operations for esophagus are normally conducted if long gap esophageal atresia exists. During multistaged extrathoracic esophageal elongation procedure, the dissection of the esophagus poses severe problems due to adhesion. However, Gore-Tex membrane may simplify esophagus dissection. The most popular adhesion barriers used today are sodium hyaluronate (Seprafilm; Genzyme Corp., Cambridge, MA) and oxidized regenerated cellulose (Interceed; Johnson&Johnson Medical Inc., New Brunswick, NJ). The purpose of this study is to investigate the efficacy of adhesion barriers on esophagus dissection. METHODS: In the study, 21 Wistar albino adult male rats were worked on. The rats were randomly divided into three groups, each including seven rats. About 1cm-segment of the esophagus, located just behind the trachea, was dissected from the surrounding tissues through blunt dissection. Rats in group 1 were wrapped with Seprafilm, and in group 2 with Interceed. But the rats in group 3 underwent only esophagus dissection. Three weeks later, during esophagus dissection, adhesion scoring was performed and esophagus was divided into two parts: one for the assessment of hydroxyproline level, and the other for histological examination. RESULTS: When the adhesion scores of the three groups were compared, there was not a significant difference between the groups (p=0.75). In terms of tissue hydroxyproline levels, mean scores of hydroxyproline revealed no significant difference between the three groups (p=0.19). When the histopathological results were examined, esophagus looked normal and no connective tissues were seen around esophagus. CONCLUSION: Seprafilm and Interceed had no effect on esophagus dissection. Although Seprafilm had the best mean score, this was statistically insignificant. Gore-Tex might play a better role than Interceed in preventing adhesion formation; however, it is still not certain whether adhesion barrier should be used in such organs as esophagus having no serosa.


Asunto(s)
Implantes Absorbibles , Atresia Esofágica/cirugía , Ácido Hialurónico , Animales , Atresia Esofágica/patología , Masculino , Distribución Aleatoria , Ratas , Ratas Wistar , Adherencias Tisulares/patología , Adherencias Tisulares/prevención & control
16.
Scand J Urol Nephrol ; 40(1): 12-6, 2006.
Artículo en Inglés | MEDLINE | ID: mdl-16452049

RESUMEN

OBJECTIVE: To investigate long-term testicular function in pentoxifylline- and NG-nitro-L-arginine methyl ester (L-NAME)-treated rats prior to spermatic artery ligation by assessing serum inhibin B concentration, a reliable endocrine marker of spermatogenesis. MATERIAL AND METHODS: Forty prepubertal rats were randomly divided into four equal groups. Right orchiectomy was performed in all rats. Intraperitoneal pentoxifylline and L-NAME were administered to Groups 1 and 2, respectively. Rats in Group 3 did not receive any medication. The spermatic arteries of the left testes were ligated in all groups with the exception of the sham controls (Group 4). One month postoperatively, a histopathologic evaluation was performed and serum inhibin B concentrations were assessed in all groups. RESULTS: There were no statistically significant differences in testis size or serum inhibin B concentration between Groups 1, 2 and 3. However, the testes were significantly smaller (p(1)=0.01, p(2)=0.01, p(3)=0.01) and serum inhibin B levels were significantly decreased (p(1)=0.01, p(2)=0.01, p(3)=0.01) when Groups 1-3 were compared with Group 4. Histopathological evaluations revealed necrosis and calcification in all specimens with the exception of the sham-operated group. CONCLUSIONS: The long-term outcomes of spermatic artery ligation were poor and testicular atrophy developed in rat testes in all study groups. Testicular atrophy could not be reversed by preoperative administration of pentoxifylline and L-NAME.


Asunto(s)
NG-Nitroarginina Metil Éster/farmacología , Pentoxifilina/farmacología , Espermatogénesis/efectos de los fármacos , Testículo/efectos de los fármacos , Animales , Biopsia con Aguja , Modelos Animales de Enfermedad , Inmunohistoquímica , Ligadura , Masculino , Orquiectomía , Probabilidad , Distribución Aleatoria , Ratas , Ratas Wistar , Valores de Referencia , Factores de Riesgo , Sensibilidad y Especificidad , Cordón Espermático/irrigación sanguínea , Estadísticas no Paramétricas , Testículo/fisiología
17.
Urol Int ; 75(1): 70-4, 2005.
Artículo en Inglés | MEDLINE | ID: mdl-16037712

RESUMEN

INTRODUCTION: The Fowler-Stephens maneuver, a mode of spermatic vessel ligation, is a method of choice in the management of high testes. The aim of the present study is to investigate the effects of pre-ischemic administration of N(G)-nitro-L-arginine methyl ester (L-NAME), a nitric oxide (NO) synthase (NOS) inhibitor, in preventing testicular ischemic damage and germ cell-specific apoptosis in rats. MATERIALS AND METHODS: 30 min before ligation of the spermatic vessels, L-NAME was administered intraperitoneally to a group of rats and saline was given to another group of rats (controls). Biochemical assessments of NO and germ cell-specific apoptosis were performed. RESULTS: Testicular NO levels in the L-NAME group showed significant decreases in the ipsilateral (p = 0.004) and contralateral (p = 0.015) testes in relation to those of the control group. The apoptotic indices were found in 2.3% of the L-NAME group and 3.1% of the control group. CONCLUSION: Pre-ischemic administrations of the NOS inhibitor, L-NAME, effectively decreased NO production and to some degree caused a reduction in germ cell apoptosis in the rat testes after spermatic vessel ligation. Further studies are mandatory to confirm our preliminary results and to address the potential introduction of NOS inhibitors into clinical practice.


Asunto(s)
Apoptosis/efectos de los fármacos , Inhibidores Enzimáticos/administración & dosificación , Isquemia/prevención & control , NG-Nitroarginina Metil Éster/administración & dosificación , Óxido Nítrico Sintasa/antagonistas & inhibidores , Espermatozoides/patología , Testículo/irrigación sanguínea , Animales , Criptorquidismo/patología , Criptorquidismo/cirugía , Modelos Animales de Enfermedad , Etiquetado Corte-Fin in Situ , Isquemia/enzimología , Isquemia/patología , Ligadura , Masculino , Distribución Aleatoria , Ratas , Ratas Wistar , Cordón Espermático/irrigación sanguínea , Cordón Espermático/cirugía , Espermatozoides/efectos de los fármacos , Testículo/enzimología , Testículo/patología
18.
Acta Histochem ; 106(6): 459-66, 2005.
Artículo en Inglés | MEDLINE | ID: mdl-15707655

RESUMEN

Management of high testis may vary but the most popular method in surgical treatment is the Fowler-Stephens maneuver. The aim of the present study was to investigate the effects of spermatic vessel ligation on testicular nitric oxide (NO) levels, expression of inducible nitric oxide synthase (iNOS), and endothelial nitric oxide synthase (eNOS) and germ cell-specific apoptosis in both ipsilateral and contralateral testes in rats. Twenty-eight animals were randomly allocated into four groups (n=7 each). The spermatic vessels were ligated as a simulation of the Fowler-Stephens maneuver. The groups of animals were sacrificed at 2 h (group 1), 4 h (group 2) and 24 h (group 3) after ligation, respectively. Sham-operated animals served as controls (group 4). Biochemical assessment of testicular NO levels was performed by the Griess method. iNOS and eNOS expression and apoptosis were studied in ipsilateral and contralateral testes. Testicular NO levels at 24 h after the simulated Fowler-Stephens maneuver were found to be significantly increased in both ipsilateral and contralateral testes when compared with the sham-operated group. eNOS expression was clearly increased in ipsilateral testes, whereas moderate expression was detected in the contralateral seminiferous tubules at 24 h after ligation. Mild focal iNOS immunostaining was also observed in seminiferous tubules of the ipsilateral testis at 24 h after the simulated Fowler-Stephens maneuver. Apoptosis was dramatically increased in ipsilateral testes; however, it was only detected in single cells in the contralateral side at 24 h after ligation. In conclusion, the simulated Fowler-Stephens maneuver induces testicular nitric oxide synthesis and germ cell-specific apoptosis in the ipsilateral testis. These results suggest that high levels of NO induce apoptosis and may impair spermatogenesis thus explaining the unsuccessful outcome of the Fowler-Stephens maneuver.


Asunto(s)
Apoptosis , Óxido Nítrico/metabolismo , Cordón Espermático/fisiología , Espermatozoides/citología , Espermatozoides/metabolismo , Testículo/metabolismo , Animales , Masculino , Óxido Nítrico Sintasa/metabolismo , Óxido Nítrico Sintasa de Tipo II , Óxido Nítrico Sintasa de Tipo III , Ratas , Ratas Wistar , Cordón Espermático/cirugía
19.
Scand J Urol Nephrol ; 38(3): 207-10, 2004.
Artículo en Inglés | MEDLINE | ID: mdl-15204372

RESUMEN

OBJECTIVE: Despite a great number of studies, very little is known about the mechanism of action of enuresis alarm systems. Nevertheless, as a result of this treatment many children are able firstly to wake up before urination occurs and then, in time, to sleep through the night without voiding. The aim of this study was to investigate the effect of enuresis alarms on bladder storage capacities. MATERIAL AND METHODS: A total of 28 children aged >7 years who were not polyuric but who voided once every night, slept alone in their own bedroom and who were willing, along with their family members, to cooperate were recruited. Patients were asked to record their urine output using a frequency/volume chart for two consecutive days. After these records and the results of physical and laboratory examinations were taken into consideration, treatment was instituted with the bell-and-pad (alarm) system for a period of 12 weeks. At the end of this period, patients were asked to complete another frequency/volume chart. RESULTS: The pre- and post-treatment maximum functional bladder capacity was 178.35 +/- 87.86 ml and 243.03 +/- 102.84 ml, respectively and the pre- and post-treatment mean day-time bladder capacity was 111.11 +/- 45.87 and 148.445 +/- 7.68 ml. Both of these differences were statistically significant (p < 0.0001 and <0.0001, respectively). The maximum nocturnal bladder capacity was found to be increased from 177.85 +/- 84.95 to 255.25 +/- 124.52 ml after treatment (p < 0.0001). CONCLUSION: Treatment with the alarm system for a period of 12 weeks was seen to be associated with a significant increase in bladder storage capacities (maximum nocturnal bladder capacity, maximum functional bladder capacity and mean day-time bladder capacity).


Asunto(s)
Terapia Conductista/instrumentación , Enuresis/terapia , Vejiga Urinaria/fisiopatología , Adolescente , Nivel de Alerta , Niño , Ritmo Circadiano , Condicionamiento Clásico , Enuresis/fisiopatología , Femenino , Humanos , Masculino , Orina
20.
Scand J Urol Nephrol ; 38(2): 122-4, 2004.
Artículo en Inglés | MEDLINE | ID: mdl-15204393

RESUMEN

OBJECTIVE: The meatal advancement and glanuloplasty (MAGPI) technique is still successfully used for the repair of distal hypospadias. The technique has been modified considerably since it was first described in 1981. The primary drawbacks of the procedure are the complications of meatal regression and meatal stenosis. The aim of this study was to present a modification of MAGPI for correction of distal hypospadias. MATERIAL AND METHODS: Ten cases with distal hypospadias were operated on using our modified MAGPI procedure. The modification involves excision of a pull-out, tag-shaped piece of glanular tissue through the vertical incision in the meatoplasty section of the original operation. By means of this excision, burying of the meatus into the glans was eased without inducing extra mobilization of the glans wings. As less glans tissue was left at the dorsal urethra the urethral meatus could be replaced in the center of the glans and better anatomic reconstruction could be attained. RESULTS: After 1-3 years of follow-up, all the operated cases showed functionally and cosmetically satisfactory results. The cosmetic appearance achieved with our modified technique was better than that obtained with the classical MAGPI procedure. CONCLUSIONS: Using our MAGPI modification, the urethra was localized deeper in the glans and an elliptical (slit-like), wide meatus was obtained, the cosmetic appearance of which was more acceptable than that achieved with classical MAGPI.


Asunto(s)
Hipospadias/cirugía , Pene/cirugía , Procedimientos Quirúrgicos Urológicos Masculinos/métodos , Adolescente , Niño , Preescolar , Estudios de Seguimiento , Humanos , Masculino , Resultado del Tratamiento
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