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Internal anal sphincter image

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Endoanal ultrasound is now regarded as the gold standard for evaluating anal sphincter pathology in the investigation of anal incontinence. The advent of three-dimensional ultrasound has further improved our understanding of the two-dimensional technique. Endoanal ultrasound requires specialised equipment and its relative invasiveness has prompted clinicians to explore alternative imaging techniques. Transvaginal and transperineal ultrasound have been recently evaluated as alternative imaging modalities.
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Vaginal endosonography. New approach to image the undisturbed anal sphincter

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Vaginal endosonography. New approach to image the undisturbed anal sphincter

Purpose: Although anal endosonography provides clear images of anal sphincters, the probe in the anal canal may distort epithelial structures and sphincter muscles may be compressed, producing inaccurate muscle thickness measurements. The aim of this study is to describe a new approach using vaginal endosonography to image the anal canal undistorted. Methods: Twenty females 10 healthy volunteers and 10 with fecal incontinence had both anal and vaginal endosonography performed. Results: The undisturbed anorectum, submucosa, anal cushions, and anal sphincter muscles were clearly visualized by vaginal endosonography, and anatomy was described.
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Ultrasound imaging of the anal sphincter complex: a review

Sign up. Illustrated anatomical parts with images from e-Anatomy and descriptions of anatomical structures. Description: The Sphincter ani internus Internal sphincter ani is a muscular ring which surrounds about 2. It is about 5 mm.
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The internal anal sphincter , IAS , or sphincter ani internus is a ring of smooth muscle that surrounds about 2. It is myogenic in nature and playing phasic and tonic state for relaxation and contraction. Its action is entirely involuntary , and it is in a state of continuous maximal contraction.
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    Doutaur1 year ago

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