科研之友
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摘要
The vesicourethral junction comprising the vesical trigone, is relevant in setting and positioning of the urinary bladder, along with the vesical neck, fixed by lateral ligaments of the bladder and tendinous arch of the pelvis fascia. Namely,the puboprostatic ligament (men) and the pubovesical (women). The circular set elastic fibers in this junction are important and valuable in the elasticity and plasticity of the area, allowing quick expansion and withdrawal with the flow of urine, and associated to smooth muscle tissue and nerve control form an important collective to maintain urinary continence. The objective of the present study is to describe the elastic system in the vesicouretral junction in relation to aging and its involvement in the states of urinary continence and incontinence, as well as the study of the vesicouretral junction in various age groups while evaluating with electron transmission microscopy. To carry out the study, 12 Wistar rats were used, divided into groups: neonate (4 animals), adult group (4 animals) and aged group (4 animals). Electron transmission microscopy with use of tanic acid technique associated to glutaraldehyde fixation, satisfactorily showed the extreme structural differences between mature elaunin and oxytalan fibers present between intercelular spaces and bundles of collagen fibers. The phases of elastogenesis in neonate animals and degradation of the elastic system of older animals were also evaluated. La uni車n vesico-uretral, componente del tr赤gono vesical, posee una relevante importancia en la fijaci車n y posicionamiento de la vejiga urinaria conjuntamente con el cuello vesical, fijado por los ligamentos laterales de la vejiga y arco tendinoso de la fascia de la pelvis. Principalmente, sus componentes anteriores son: el ligamento puboprost芍tico en los hombres y el ligamento pubovesical en las mujeres. Las fibras el芍sticas dispuestas circularmente en esta uni車n, son de valiosa importancia en la elasticidad y plasticidad de la regi車n, permitiendo expansi車n y retiro r芍pido con el flujo de la orina, y asociado a musculatura lisa y control nervioso forman un conjunto importante para el mantenimiento de la continencia urinaria. Debido a existencia de puntos no esclarecidos en esta regi車n en relaci車n al sistema el芍stico y su participaci車n en los estados de continencia/incontinencia urinaria, el presente trabajo tiene por objetivo el estudio de la uni車n vesico-uretral evalu芍ndola en diferentes grupos etarios, a trav谷s de la microscop赤a electr車nica de transmisi車n. Fueron utilizados 12 ratones Wistar, divididos en gru
