Feline Peritoneal Effusions—A Poor Prognosis?

Feline ascites has been reported to have a poor prognosis, with a median survival time of 21 days (considering all etiologies). However, previous studies included relatively small populations (<100 cases) and there is no literature evaluating the prognosis of all causes of feline ascites within the last 20 years. This study aimed to assess the survival times of a large population of cats presenting with ascites and assess the effect of the effusion cause, signalment, clinicopathological and imaging findings on survival. Data was acquired from the medical record system of a referral hospital (including both referrals and first-opinion emergency cases). Four hundred and ninety-eight cats met the inclusion criteria and 55% of all cases survived to discharge. Median survival time post-discharge was 30.5 days. The cause of the effusion was significantly associated with survival to discharge (<i>p</i> = 0.002). Common etiologies of ascites included neoplasia, septic peritonitis, sterile inflammatory disease, uroperitoneum, hemoperitoneum and cardiac disease. Uroperitoneum cases had the highest rate of survival to discharge (77%), while hemoperitoneum cases had the lowest percentage surviving to discharge (40%). Subjectively assessed effusion volume on imaging was significantly associated with survival to discharge (<i>p</i> = 0.012). Subjective assessment of the effusion volume and effusion assessment via abdominocentesis to help obtain a diagnosis can help guide prognosis and are diagnostics that do not require advanced techniques or specialist equipment, which can provide important prognostic information for cats presenting with ascites.