ArticleMiller RE, Chernish SM, Brunelle RL.
Gastrointest Radiol. 1977 Oct 25;2(2):163-8.
To demonstrate esophageal varices barium sulfate suspensions must coat the lower esophagus for as long as 5 to 10 minutes. This study compared the ability of five barium sulfate preparations to resist disappearance by inadvertent swallowing. Three of the special preparations for esophageal examination, Esophatrast, Barosperse Esophageal Paste, and HD-5000 performed satisfactorily. Examiner skill, persistence, and careful technique are the most important factors in examining the lower esophagus. The authors' procedure for examination of the esophagus for varices is described. It takes into account position, time, phase of respiration, occasional use of drugs, and procedures to insure good coating and relaxation of the lower esophagus.