Effect of viscosity on oropharyngeal and esophageal emptying in man

Chung H. Kim, Joseph J. Hsu, Michael K. O'Connor, Amy L. Weaver, Manuel L. Brown, Alan R. Zinsmeister

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


The effect of bolus viscosity on oropharyngeal and esophageal emptying is not known. We investigated this question in 38 healthy volunteers by measuring the transit of five semisolid boluses of varying viscosities across the oropharynx and the esophagus with the aid of scintigraphy. The studies were performed twice on consecutive days. The results show that oropharyngeal and esophageal emptying are reliably reproduced from day to day. Esophageal emptying was inversely related to bolus viscosity; however, oropharyngeal emptying was not influenced by bolus viscosity. We conclude that bolus viscosity has significant, but selective, effect on oropharyngoesophageal emptying.

Original languageEnglish (US)
Pages (from-to)189-192
Number of pages4
JournalDigestive diseases and sciences
Issue number1
StatePublished - Jan 1 1994


  • esophageal emptying
  • oropharyngeal emptying
  • viscosity

ASJC Scopus subject areas

  • Physiology
  • Gastroenterology


Dive into the research topics of 'Effect of viscosity on oropharyngeal and esophageal emptying in man'. Together they form a unique fingerprint.

Cite this