TL;DR: Seeing bright red blood in your cat's vomit is a high-priority medical emergency that requires immediate veterinary attention. Documenting the vomit with a photo can help the medical team quickly assess the severity and cause of the bleeding.
What does it mean if my cat is vomiting bright red blood?
Finding bright red blood in your cat's vomit, medically known as hematemesis, is a distressing sight for any pet owner. Bright red blood typically signifies 'fresh' bleeding, meaning the source is likely in the upper gastrointestinal tract, such as the mouth, esophagus, or stomach. Unlike dark, coffee-ground-like blood which has been partially digested, bright red blood indicates that the injury or irritation is active and recent.
Is my cat vomiting blood a medical emergency?
- Vomiting bright red blood is classified as a high-priority medical emergency.
- Even if your cat appears to be acting normally, internal bleeding can lead to rapid blood loss, anemia, and shock.
- Potential causes range from the ingestion of sharp foreign objects or toxins (like rat poison) to severe ulcers or clotting disorders.
- You should contact your primary veterinarian or the nearest 24-hour emergency animal hospital immediately.
How does taking a photo of my cat's vomit help the veterinarian?
- A clear photograph allows the doctor to assess the volume of blood and the consistency of the fluid.
- The visual helps the veterinary team identify the presence of any foreign materials.
- This evidence helps the medical team prioritize your cat's case during triage.
- Sharing a photo can significantly speed up the diagnostic process once you arrive at the clinic.
Clinical Context (Merck Veterinary Manual)
In cats, the presence of frank blood in vomitus indicates a bleeding lesion such as a gastric ulcer or neoplasm. Evaluation during triage should include assessment of mucous membrane color (pale or white suggests anemia or shock), capillary refill time (prolonged indicates poor perfusion), heart rate (tachycardia may indicate hypovolemia), pulse rate and quality (weak or absent suggests poor perfusion), and level of consciousness (depression suggests decreased cerebral perfusion). Additionally, acute severe abdominal hemorrhage secondary to liver lobe rupture can present with vomiting and is more common in Oriental shorthair and Siamese cats; ultrasonography and aspiration of abdominal effusion can help confirm active hemorrhage.
Chapter: Gastroenterology, Infectious Disease
Source: The Merck Veterinary Manual, 11th Edition (Page 156)