Methods of venous catheterization

Venous catheterization, also known as deep vein puncture catheterization, involves selecting a suitable puncture site and inserting the needle subcutaneously, with negative pressure until dark red blood is absorbed, indicating that the needle has entered the vein. A guide wire is inserted to exit the puncture needle and leave the guide wire in the blood vessel. Then, the vein that needs to be retained is inserted along the guide wire, and the guide wire is removed. Diluted heparin saline is injected and the catheter is fixed, The deep vein catheterization has already been completed. The veins commonly chosen for puncture and catheterization in clinical practice include subclavian veins, internal jugular veins, femoral veins, etc. After indwelling the puncture catheter, it is important to strengthen the care of the puncture site to avoid infection, thrombosis, or catheter detachment