When restraining an animal for an intravenous injection, what should you do once the animal is ready for the injection?

Once the animal is ready for the intravenous injection, it is important to let your finger off the vein to allow for proper blood flow and prevent complications. Holding excessive pressure on the vein can cause vasoconstriction, which may make it more difficult to locate the vein and can also lead to tissue damage. By releasing the pressure just before the injection, you help to ensure that the vein remains open and allows for the smooth administration of the medication.

This action also minimizes the risk of hematoma formation, which can occur if the injection is done with too much pressure on the vein. Therefore, the technique of allowing for a relaxed grip on the vein at the moment of injection is crucial for a successful and safe intravenous procedure.