Routine infusions, called intravenous infusions, therefore the main choice of vessel for infusion in clinical practice is a vein rather than an artery. The arteries are deeper and have higher pressure, which can cause reflux of blood during puncture or infusion, and even cause hemorrhagic shock if not handled properly, causing very serious complications for the patient. The infusions performed in the clinic are all superficial venous infusions. Some patients may have a central vein punctured and infused depending on their condition or need due to the occurrence of phlebitis caused by an obscure surrounding venous network or long-term medical drip. There are superficial veins and even thicker deep veins that are also used as clinical means of puncture for infusion, commonly used are subclavian vein, saphenous vein, jugular vein and so on, so in clinical infusion are venous vessels.