anal sphincter

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anal sphincter

[′ān·əl ′sfiŋk·tər]
(anatomy)
Either of two muscles, one voluntary and the other involuntary, controlling closing of the anus in vertebrates.
References in periodicals archive ?
The aim of the biofeedback was to eliminate inappropriate contraction of the external anal sphincter during defecation attempts.
41] Wasserman[42] described a condition that he termed puborectalis syndrome, consisting of "a type of stenosis of anorectum caused by a spasm of a component of the external anal sphincter muscle.
Use a 2-0 suture to repair the external anal sphincter.
There are 2 commonly used methods of external anal sphincter repair: one, the traditionally taught end-to-end approximation of the cut ends, and the other, overlapping the cut ends of the external sphincter and suturing through the overlapped portions (FIGURE 2).
1] Recently, the important contribution of the external anal sphincter for continence, particularly in the patients with anorectal anomalies has been stressed.
External anal sphincters (EAS), is 5mm thick and has of mixed echogenicity, with a white layer deficient anteriorly & superiorly.
For years, restoration meant end-to-end external anal sphincter repairs.
The internal anal sphincter should be closed with the same fine interrupted or running sutures, and the external anal sphincter should be closed using 2-0 prolonged delayed absorbable (PDS/Maxon) sutures with either an overlapping or end-to-end technique.
For the external anal sphincter, use 2-0 prolonged delayed sutures (such as PDS II or Maxon), she advised, noting that second-degree repair and perineorrhaphy may be necessary to reattach the rectovaginal septum to the perineal body, thus restoring normal anatomy.
The external anal sphincter and puborectalis muscles reveal their tone as the patient squeezes.
The external anal sphincter is then mobilized and an overlapping repair is done.
Movement of feces out of the rectum is prevented by the internal and external anal sphincters and the pelvic floor muscles, particularly the pubo-rectalis muscle.

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