When a dog is sick, it is crucial to help them get well again. This requires taking them to the veterinary clinic and allowing the doctor to diagnose the dog. If a simple antibiotic cannot be given, the dog will have to be attached to an IV and kept for observation. But before the IV can be attached, a catheter must first be inserted. Catheters are often inserted by a veterinary technician, but in case an extra set of hands is needed, it’s necessary to know how the procedure works.