Esophageal sphincter


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Related to Esophageal sphincter: esophageal peristalsis

Esophageal sphincter

A circular band of muscle that closes the last few centimeters of the esophagus and prevents the backward flow of stomach contents.
Mentioned in: Achalasia
References in periodicals archive ?
If you have GERD, the lower esophageal sphincter sometimes remains open, allowing acid to go up into the esophagus.
In addition, Carlson and Hirano (12) examined the complex mechanisms of reflux during running by new technology simultaneous high-resolution manometry, and pH-impedance in 10 healthy subjects after a meal, including transient lower esophageal sphincter relaxation (transient lower esophageal sphincter relaxation, aka "belch reflex") and transient formation of a hiatal hernia.
Functional and molecular analysis of L-type calcium channels in human esophagus and lower esophageal sphincter smooth muscle.
Complete lower esophageal sphincter relaxation observed in some achalasia patients is functionally inadequate.
All patients Limited SSc Diffuse SSc Parameter r p value r p value r p value LESP -0.127 0.496 -0.050 0.823 -0.038 0.917 Relaxation % -0.331 0.070 -0.108 0.144 -0.172 0.408 Amplitude -0.117 0.531 0.014 0.951 -0.295 0.087 Duration -0.138 0.459 -0.042 0.856 -0.465 0.176 LESP = lower esophageal sphincter pressure, r = correlation coefficient, SSc = systemic sclerosis.
(Figures 1 and 2) The lower esophageal sphincter was lax as seen from the stomach.
Thick lower esophageal sphincter in younger patients is suggested as cause of this poor response17.
Caption: Heartburn results when the lower esophageal sphincter does not close properly, allowing stomach acid to flow back into the esophagus.
As showed, there were no significant differences (all p value > 0.05) in mean age, symptom duration, LESP (lower esophageal sphincter pressure), IRP (integrated relaxation pressure), length of LES (lower esophageal sphincter), and prior history of treatment between the two groups.
During an upper EUS examination, the thyroid gland is usually visualized close to the upper esophageal sphincter. However, EUS is limited in visualizing the upper portions of the thyroid glands [4, 5].
The therapy directly targets the patient's weak or dysfunctional lower esophageal sphincter muscle between the stomach and the esophagus, often the underlying cause of reflux.