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Fluid in the Lungs in Cats

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Pulmonary Edema in Cats


Pulmonary edema refers to fluid buildup in the lungs and is often associated with pneumonia, although there are many other possible causes. Normal lungs have fluid that is moved from the lungs into the internal space of the body, an on-going process for normal healthy function. If there is added pressure in the lungs or other underlying conditions, this mechanism can become damaged and fluid can begin to build in the lungs.


If this excess fluid is not removed, edema forms. Damage can occur if this condition is left untreated, but when treated appropriately, the outcome is positive.


Animals of all ages, genders, and breeds can be diagnosed with pulmonary edema. If you would like to learn more about how this disease affects dogs, please visit this page in the PetMD health library.


Symptoms and Types


Some of the most common symptoms of pulmonary edema are:


  • Tachypnea
  • Dry cough
  • Dyspnea
  • Wheezing
  • Crackling noises during breathing (rales)
  • Open-mouth breathing


Pulmonary edema affects both the respiratory and cardiovascular systems.




Some of the most common causes for pulmonary edema are:


  • Anemia
  • Pneumonia
  • Cardiomyopathy
  • Too little protein in the blood (hypoproteinemia)
  • Toxins (e.g., smoke and snake venom)
  • An obstruction of the animal's airway
  • A near drowning (where a high amount of fluid enters the lungs)




Upon examination, the following conditions will need to be ruled out for proper treatment:


  • Upper airway obstruction
  • Bronchitis
  • Pneumonia
  • Heart worm disease
  • Heart disease


Typically a blood test will be performed to look for abnormalities, as well as an X-ray to view potential signs of pneumonia.




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