Arterial puncture carries certain risks, as each patient’s individual differences and anatomical location may lead to failure of the puncture, causing local swelling and, in severe cases, subcutaneous or interstitial skin compression syndrome, requiring local skin dissection for decompression. Arterial punctures may also form pseudoaneurysms, leading to aneurysm rupture and bleeding, which may endanger the patient’s life. The most common complications are bleeding at the puncture site and subcutaneous accumulation of blood and swelling. Infection of the puncture site after puncture and allergy caused by the adhesive tape holding the puncture needle in place also occur. After placement of the arterial catheter, the catheter must be sealed with heparin to avoid the formation of thrombus in the lumen and to avoid re-injection of the thrombus into the vessel when it is used again, which may have adverse consequences. When removing the arterial puncture needle, it should be covered with sterile gauze and pressed for 5-10 minutes. Patients with coagulation disorders should be pressed for a longer period of time to prevent bleeding and hematoma.