What is a imperforate anus

In spite of the fact, that imperforate anus with perineal or vestibular fistula is considered to be a low anorectal anomaly, the majority of surgeons use posterior sagittal anorectoplasty Pena and de Vries for its correction, i. It was shown that patients with these anomalies have normally formed anal canal. However, the opening of the fistula, which is usually narrower than fecal mass, is formed in the rectum with forward displacement from the proper location of the anal orifice. The process of persistent straining of the puborectal muscle gradually results in the shortening of the anal canal. The caudal part of the anal canal does not fully open to the normal width due to muscle rigidity of the perineum. The operative procedure must be carried out before this pathologic alteration occurs.
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imperforate Anus.pptx

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imperforate 247000.ru | Medical Specialties | Clinical Medicine

Откройте для себя все, что может предложить Scribd, включая книги и аудиокниги от крупных издательств. Formation of cloaca at 3rd week: The hindgut forms the posterior portion of the cloaca the future anorectal canal the allantois forms the anterior portion the future urogenital sinus. Development of urogenital sinus and rectum at 7th week: Cloaca division into rectum and urogenital tract is initiated by the caudal movement of the urorectal septum. During the ninth week, this region recanalizes. This defect occurs because of a lack of recanalization of the lower portion of the anal canal.
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Imperforate anus pull-through procedure

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