A Review of the Pathophysiology, Classification, and Analysis of Canine and Feline Cavitary Effusions

Suzanne M. Dempsey, DVM, Patty J. Ewing, DVM, MS, Diplomate ACVP
Am Anim Hosp Assoc 201147:1–11. DOI 10.5326/JAAHA-MS-5558.

Effusion is the abnormal accumulation of fluid within a body cavity that can result from a variety of disease processes. This article reviews the normal production and resorption of body cavity fluid and the pathophysiology of abnormal fluid accumulation. In addition, classification schemes, differential diagnoses, and currently available diagnostic tests for evaluation of effusions are reviewed.