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Influence of bronchoalveolar lavage volume on cytological profiles and subsequent diagnosis of inflammatory airway disease in horses

Abstract : The aim of the study was to determine whether instillation of either 250 mL or 500 mL of saline for bronchoalveolar lavage (BAL) would influence cytological confirmation of inflammatory airway disease (IAD). Thirty client-owned Standardbred racehorses were sampled via endoscopy with 250 mL of saline in one lung and 500 mL in the contralateral lung. The procedure was repeated 72 h later, reversing the volume per lung. The proportions of BAL fluid (BALF) recovered were significantly higher and neutrophil percentages significantly lower with the larger volume. A poor agreement was found between methodologies in terms of final diagnosis, when based on proportions of neutrophils (>10% from at least one lung). Within the recommended range (250–500 mL), the instilled volume significantly influenced cytological profiles. Establishing specific BALF reference values is warranted.
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Submitted on : Wednesday, January 2, 2019 - 2:53:29 PM
Last modification on : Wednesday, October 14, 2020 - 4:07:59 AM

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Marie Orard, Marianne Depecker, Erika Hue, Pierre-Hugues Pitel, Anne Couroucé-Malblanc, et al.. Influence of bronchoalveolar lavage volume on cytological profiles and subsequent diagnosis of inflammatory airway disease in horses. Veterinary Journal, Elsevier, 2016, 207, pp.193-195. ⟨10.1016/j.tvjl.2015.09.027⟩. ⟨hal-01968315⟩

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