85 (2) pg 78

Title: 
Radiographic and ultrasonographic evaluation of the esophagus in the horse
Author(s): 
K. PALMERS, E. VAN DER VEKENS, E. PAULUSSEN, MT. PICAVET, B. PARDON, G. VAN LOON
Abstract: 

The purpose of this study was to describe the radiographic and ultrasonographic appearanceof the esophagus of ten healthy horses. Contrast radiography showed variations in the long-axisshape of the esophagus at the thoracic inlet. Administration of a large volume contrast mediumby intubation showed stasis of contrast material for several minutes in two of the ten horses. Thewall thickness of the non-distended esophagus on ultrasound was 2.6 ± 0.3 mm with significantdifferences depending on the location. Distention of the esophagus by intubation or by a bolusof water or concentrate resulted in a decrease in wall thickness and it facilitated measuring withless variation. Stasis at the thoracic inlet was seen in five of the ten horses, when a water boluswas administered. Ultrasonographic evaluation of 100g spontaneously swallowed commercialconcentrate was better than fluid (water bolus or 2.5mL/kg contrast medium) administration viaintubation to assess esophageal motility at the thoracic inlet. Stasis seen at the thoracic inlet afterbolus administration by intubation should not be regarded as an abnormal finding, and swallowing,with the subsequent peristaltic wave, has a positive influence on the bolus passage time.

Full text: 
pp 078-086
Original article(s)