Mastering IV cannula selection in veterinary practice
Dr. Geoff Carullo, DVM, FPCCP, DPCVSCA
- Articles
- 2 min read
In veterinary practice, choosing the right IV cannula can make all the difference—especially in emergencies or critical care. From tiny neonates to giant breeds, the right size ensures safe fluid therapy, smooth medication administration, and life-saving interventions.
Here’s a vet-focused guide to IV cannula sizes, colors, and when to use them:
Best for: Neonatal puppies and kittens, very small exotics (hamsters, birds)
When to use:
Vet Tip: Always secure gently. A single movement can dislodge in fragile neonates.
Best for: Small cats, toy breed dogs, small exotics
When to use:
Vet Tip: Ideal for your everyday feline patient or toy poodle on IV fluids.
Best for: Adult cats, small to medium dogs
When to use:
Vet Tip: This is your workhorse size—fits most small animal patients.
Best for: Medium to large dogs
When to use:
Vet Tip: Go for pink when you need speed and stability without over-traumatizing veins.
Best for: Large dogs, emergencies, surgical patients
When to use:
Vet Tip: In emergencies, bigger is better. A large-bore cannula saves precious time.
The smallest gauge your patient’s vein can comfortably accommodate is often the safest. But in emergencies, larger cannulas allow for life-saving fluid and blood administration in seconds.
A prepared vet is a life-saving vet.
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Dr. Geoff Carullo is a Fellow and the current President of the Philippine College of Canine Practitioners.
