TL;DR: Cyanosis, or bluish-purple gums, is a life-threatening medical emergency indicating your cat is not getting enough oxygen. Seek immediate veterinary care at the nearest emergency animal hospital if you notice any gum discoloration.
What exactly is cyanosis in cats and what does it look like?
Cyanosis is a serious clinical sign characterized by a bluish or purple discoloration of the mucous membranes, most easily seen in the gums and tongue. This color change occurs when the blood is not carrying enough oxygen to the body's tissues. It is often the result of severe issues involving the respiratory system, the heart, or the blood's ability to transport oxygen molecules.
Is blue or purple gum discoloration in my cat a veterinary emergency?
- Finding blue or purple gums on your cat is a high-urgency medical emergency indicating respiratory distress or cardiovascular collapse.
- If your cat has discolored gums, they are not getting the oxygen they need to survive.
- Seek immediate veterinary care at the nearest open animal hospital.
- Do not wait for a scheduled appointment or attempt to monitor your pet at home.
How can taking a photo of my cat’s gums help the veterinarian with triage?
- If you can safely and quickly capture a clear photo of your cat's gums without delaying your trip to the vet, please do so.
- Gum color can shift rapidly due to stress or oxygen therapy; a photo provides a clear record of the severity of oxygen deprivation experienced at home.
- Visual evidence helps the veterinary team assess the situation more accurately and prioritize your cat's treatment during the triage process.
Clinical Context (Merck Veterinary Manual)
In cats, cyanosis (blue or gray mucous membranes) indicates significant loss of pulmonary function and impending pulmonary arrest, and it signifies severe hypoxemia. During triage, evaluation of mucous membrane color is critical. Normal capillary refill time is 1-2 seconds, while cyanosis may be concurrent with a capillary refill time of >2 seconds, indicating poor perfusion or peripheral vasoconstriction. The normal heart rate for cats is 120-200 bpm; tachycardia (heart rate >220 bpm) should also be noted.
Chapter: Emergency, Respiratory
Source: The Merck Veterinary Manual, 11th Edition (Page 1663)