Faculty Collaboration Database

Modulation of oesophago-UOS contractile reflex: effect of proximal and distal esophageal distention and swallowing. Neurogastroenterol Motil 2003 Jun;15(3):323-9

Date

06/06/2003

Pubmed ID

12787342

DOI

10.1046/j.1365-2982.2003.00415.x

Scopus ID

2-s2.0-0038772362 (requires institutional sign-in at Scopus site)   11 Citations

Abstract

Upper oesophageal sphincter (UOS) tone is influenced by intraoesophageal pressure events. Our aim was to test the hypothesis that UOS tone is responsive to simultaneous inhibitory and stimulatory signals originating from the oesophagus and compare effect of proximal and distal oesophageal air distention on oesophageal balloon-stimulated UOS contraction. We studied 16 healthy volunteers, ages 19-80 years in two stages. We induced UOS contraction by distending various size balloons intraoesophageally and studied response of contracted UOS to oesophageal air distentions and swallowing. Intraoesophageal injections of 60-ml room air resulted in UOS pressure augmentation (31%), relaxation (64%) and no effect in the remaining 5% of instances. The majority of air injections into the oesophageal segment proximal to the distended balloon were followed by relaxation of the contracted UOS, whereas, the majority of oesophageal air distentions distal to the balloon resulted in augmentation of UOS contraction (P < 0.01). Swallowing resulted in complete relaxation of the UOS. In conclusion, UOS contractile response to oesophageal balloon distention is overridden by further augmentation or relaxation as a result of oesophageal air distention and swallowing. Contractile and inhibitory responses of the contracted UOS to generalized oesophageal distention is region-specific.

Author List

Aslam M, Kern M, Shaker R

Author

Reza Shaker MD Assoc Provost, Sr Assoc Dean, Ctr Dir, Chief, Prof in the Medicine department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Adult
Deglutition
Esophagogastric Junction
Esophagus
Humans
Manometry
Middle Aged
Muscle Contraction
Muscle Relaxation
Muscle, Smooth
Physical Stimulation
Pressure
Reflex