sphincter


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Related to sphincter: sphincter muscle, Sphincter of Oddi, sphincterotomy, sphincter spasm, Esophageal sphincter

sphincter

Anatomy a ring of muscle surrounding the opening of a hollow organ or body and contracting to close it

Sphincter

 

a ringlike muscle that constricts to close a natural orifice such as the oral or anal opening, or to narrow the passage from one part of a hollow tubular organ to another, for example, from the stomach and bile duct to the duodenum and from the bladder to the urethra. The sphincter is always in a tonic state. The orbicular muscle of the iris is a sphincter. Some sphincters consist of striated muscle and others of smooth muscle innervated by the autonomic nervous system.

sphincter

[′sfiŋk·tər]
(anatomy)
A muscle that surrounds and functions to close an orifice.
References in periodicals archive ?
Paul, Minnesota that develops and markets products designed to treat sphincter disorders utilizing its technology platform, Magnetic Sphincter Augmentation (MSA).
This investigation concluded that non-ablative radiofrequency application appeared to induce profound morphological changes in the sphincter muscle that lead to an anatomical state reminiscent of the baseline sphincter structure.
13 years of experience with artificial urinary sphincter implantation at Baylor College of Medicine.
If, in fact, a workable and sustainable bioengineered replacement sphincter could be perfected, how would it stack up for a Nobel Prize?
Sphincter laceration was defined as a clinically recognizable third or fourth degree laceration.
Synergy between detrusor contraction simultaneously with smooth and striated sphincter relaxation is extremely important for a balanced LUT.
This takes us one step closer to realizing the goal of using a patient's own cells to engineer a replacement sphincter in the lab," stated Bitar.
Dysfunction of the upper oesophageal sphincter is another proposed hypothesis (10,11).
These new cells regenerate the sphincter and combat atrophy of the urethral submucosa, allowing the normal mechanisms of continence to be restored.
An anal sphincter tear was also more likely to occur in women who had an episiotomy or a forceps assisted birth than women who did not receive these procedures.
Patients with hypertensive LES pressure (group A) had higher esophageal tone (43 versus 19 mm Hg) and less relaxation of the sphincter (50% versus 67%) than did patients with normal/hypotensive LES pressure (group B).
Sphincter of oddi dysfunction (SOD) is one of the causes for this entity.