Peer-reviewed veterinary case report
Swallow study signs of lower esophageal sphincter problems in dogs
By Grobman, Megan E et al.·Published in Journal of veterinary internal medicine·2019·Department of Veterinary Medicine and Surgery·View original on PubMed →
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Original publication title: Videofluoroscopic swallow study features of lower esophageal sphincter achalasia-like syndrome in dogs.
- Species:
- dog
Plain-English summary
A group of dogs with swallowing difficulties was studied to see if they had a condition called lower esophageal sphincter achalasia-like syndrome (LES-AS), which can cause megaesophagus (a condition where the esophagus is enlarged and doesn't work properly). Out of 130 dogs tested, 19 were found to have LES-AS, and many of them also had megaesophagus. The study showed that specific tests could help identify these dogs, which might benefit from targeted treatments. This is important because it could lead to better management options for dogs suffering from these swallowing issues.
People also search for: dog swallowing problems · megaesophagus in dogs · treatment for dog esophagus issues
Abstract
BACKGROUND: Megaesophagus (ME) carries a poor long-term prognosis in dogs. In people, lower esophageal sphincter (LES) disorders causing functional obstruction are rare causes of ME that may respond to targeted treatment. Functional LES disorders are reported rarely in dogs because of challenges in diagnostic methodologies. HYPOTHESIS/OBJECTIVES: To identify dogs with videofluoroscopic swallow study (VFSS) features of LES achalasia-like syndrome (LES-AS). We hypothesized that dogs with LES-AS could be distinguished from normal dogs using standardized VFSS criteria. ANIMALS: Dogs with LES-AS by VFSS (n = 19), healthy normal dogs (n = 20). METHODS: Retrospective study. One-hundred thirty dogs presented to the University of Missouri Veterinary Health Center (MU-VHC) between April 2015 and December 2017 for a free-feeding VFSS; 20 healthy dogs were included as controls. Swallow studies were evaluated for failure of the LES to relax during pharyngeal swallow (LES-AS). Affected dogs subsequently were evaluated using standardized criteria to identify metrics important for identifying and characterizing dogs with LES-AS. RESULTS: Nineteen dogs with LES-AS were identified out of 130 VFSS. Megaesophagus was present in 14 of 19 (73.7%) dogs with LES-AS. A baseline esophageal fluid-line and "bird beak" were present in 68.4% (95% confidence interval [CI], 47.5%-89.3%) and 63.2% (95% CI, 41.5%-84.8%) of affected dogs, respectively. The esophagus was graded as acontractile (8/19), hypomotile (8/19), or hypermotile (3/19). CONCLUSIONS AND CLINICAL IMPORTANCE: Dogs with LES-AS may successfully be identified by VFSS using a free-feeding protocol. These data are of critical clinical importance because a subpopulation of dogs with functional LES obstruction may be candidates for targeted intervention.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/31381208/