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Lipid laden macrophage indices and reflux finding score in canine gastroesophageal reflux model
Author(s) -
Nino Gustavo,
Savchenko Oleg,
Vastola Paul,
Pagala Murali,
Dhadwal Ajay K.,
Vaynblat Mikhail,
Marcus Michael,
Kazachkov Mikhail
Publication year - 2007
Publication title -
pediatric pulmonology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.866
H-Index - 106
eISSN - 1099-0496
pISSN - 8755-6863
DOI - 10.1002/ppul.20715
Subject(s) - reflux , medicine , gastroenterology , esophagus , airway , esophageal disease , respiratory system , surgery , disease
Laryngeal exposure to acid and aspiration of gastric contents may lead to severe respiratory disorders. This study utilizes the canine model of Gastroesophageal reflux (GER) to identify whether lower esophageal dysfunction is associated with upper and lower airway pathology. Materials and Methods Five mongrel dogs underwent GER‐creating surgery (partial cardiomyectomy). Laryngeal reflux finding score (RFS), lipid‐laden macrophage index (LLMI) and BAL fluid cell differential were obtained before and after surgery. Results Partial cardiomyectomy in dogs significantly increased the Reflux index (RI) from 0.38 ± 0.21% to 7.56 ± 2.89% ( P = 0.048), the duration of the longest reflux episode (DLRE) from 1.22 ± 1.19 min to 66.2 ± 42.03 min postoperatively ( P = 0.049) and the total number of episodes in 24 hr from 2.06 ± 1.03 to a postoperative value of 19.24 ± 4.79. There was no statistically significant change in values for RFS, LLMI, and BAL fluid cell differential after the induction of GER. Conclusions Acid reflux to the proximal esophagus of this animal model did not cause laryngeal exposure to acid or aspiration of gastric content. The results of this study suggest that presence of GER, secondary to lower esophageal dysfunction is not necessarily associated with upper and lower airway pathology. Pediatr Pulmonol. 2007; 42:1181–1186. © 2007 Wiley‐Liss, Inc.