Arterial injections are hazardous and can lead to injection failure, massive bleeding, and adverse drug reactions.
Arteries are deep in the tissue and have thick walls, making it difficult to locate them clearly, which may lead to a greater risk of arterial injection errors; for extremely obese patients and patients with poor cooperation, the success rate of arterial injection will be affected.
In addition, the arterial blood flow is faster and the blood pressure is higher, if the needle used for puncture is thicker and not sufficiently pressed to stop bleeding after injection, it may lead to more blood flow and sub-tissue hemorrhage; for patients with abnormal coagulation function, it may increase the risk of bleeding, which is serious and may threaten life.
Since arterial blood will not be delivered to the whole body through the heart, the injected drugs will act directly on the tissues. If the concentration of injected drugs is too large, and the drugs are not delivered to the whole body without the heart for dilution, it will lead to high concentration of the local drugs, which will cause serious adverse drug reactions, such as gangrene, ischemia of the limbs, and lead to permanent dysfunction.
At the same time, the operation should be strictly carried out aseptically to prevent bacteria or foreign objects from entering the bloodstream and causing other adverse reactions.