O'Beirne sphincter

O'Beirne sphincter
rectosigmoid s.

Medical dictionary. 2011.

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Look at other dictionaries:

  • O'Beirne sphincter — (o birnґ) [James O Beirne, Irish surgeon, 1786–1862] rectosigmoid sphincter …   Medical dictionary

  • sphincter — A muscle that encircles a duct, tube, or orifice in such a way that its contraction constricts the lumen or orifice. SYN: musculus s. [TA], s. muscle [TA]. [G. sphinkter, a band or lace] s. of ampulla s. of hepatopancreatic ampulla. anatomic s.… …   Medical dictionary

  • O'Beirne — James, Irish surgeon, 1786–1862. See O. sphincter …   Medical dictionary

  • rectosigmoid sphincter — circular muscle fibers in the wall of the large intestine at the junction of the sigmoid colon and rectum; called also O Beirne s …   Medical dictionary

  • O'Beirne valve — rectosigmoid sphincter …   Medical dictionary

  • О’Бе́йрнова мы́шца — (musculus O’Beirnei; J.O’Beirne, 1786 1862, ирланд. хирург) см. Sphincter ani tertius …   Медицинская энциклопедия

  • valve — 1. A fold of the lining membrane of a canal or other hollow organ serving to retard or prevent a reflux of fluid. 2. Any formation or reduplication of tissue, or flaplike structure …   Medical dictionary

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