Presented in part at the European College of Veterinary Internal Medicine-Companion Animal Congress, Sevilla, Spain, September 2011.
Interpretation of Multisegment Bronchoalveolar Lavage in Cats (1/2001–1/2011)
Article first published online: 28 OCT 2012
Copyright © 2012 by the American College of Veterinary Internal Medicine
Journal of Veterinary Internal Medicine
Volume 26, Issue 6, pages 1281–1287, November/December 2012
How to Cite
Ybarra, W.L., Johnson, L.R., Drazenovich, T.L., Johnson, E.G. and Vernau, W. (2012), Interpretation of Multisegment Bronchoalveolar Lavage in Cats (1/2001–1/2011). Journal of Veterinary Internal Medicine, 26: 1281–1287. doi: 10.1111/j.1939-1676.2012.01016.x
- Issue published online: 20 NOV 2012
- Article first published online: 28 OCT 2012
- Manuscript Accepted: 5 SEP 2012
- Manuscript Revised: 20 AUG 2012
- Manuscript Received: 18 APR 2012
- Respiratory endoscopy;
- Thoracic radiology
Cytologic results from bronchoscopic BAL in cats with naturally occurring respiratory disease have not been reported, and the clinical utility of multisegment lavage has not been evaluated.
BAL cytology from 2 separate lung segments in cats will have similar cell counts, cytologic interpretation, or both.
Eighty-seven cases in 85 cats (2 examined twice) with naturally occurring lower respiratory disease.
A combined prospective/retrospective evaluation of all cats with multisegment BAL was performed. BAL fluid was evaluated for total nucleated cell counts, differential cell counts, and cytologic characteristics at each lavage site. BAL fluid was categorized as eosinophilic, neutrophilic, lymphocytic, hypercellular, or mixed. Radiographs were assessed for diffuse or focal disease.
Clinical diagnoses included inflammatory airway disease (n = 63), pneumonia (n = 15), neoplasia (n = 6), and undetermined (n = 3). Total nucleated cell counts varied between sites regardless of radiographic evidence of focal or diffuse radiographic disease. In 28/87 cases (32%), cell counts differed between lavage sites by 2.2–40 fold. BAL yielded similar cytologic interpretation of inflammation in 45/87 (52%) cases. In 8/14 cases that had BAL performed at the site of a focal radiographic infiltrate, as well as at a site of diffuse infiltrates, the same inflammatory interpretation was made at each site.
Conclusions and clinical importance
Total and differential cell counts in BAL fluid often differ between lung segments in cats with lower respiratory disease, and caution is warranted when using a single BAL cytology to define the inflammatory response in cats with spontaneously occurring lower respiratory tract disease.