According to Baidu Health, the central venous catheter is inserted through the peripheral vein, and the catheter is inserted into the superior vena cava and enters the left atrium. When treating diseases, drugs can be injected into the catheter, so that the drugs can directly enter the heart blood, which can reduce the stimulation to peripheral blood vessels. This catheter has a certain period of validity and cannot be used for too long. The validity period is generally about one year. After the expiration date, it can be reinserted to avoid stimulating local tissues and increase the chance of infection.

When the central venous catheter is placed in the periphery to treat diseases, the local area should be kept fresh and dry, and the local dressing should be changed regularly to avoid infection at the catheter site. Do not do strenuous exercise or heavy physical labor at ordinary times to avoid affecting health. If the catheter site has adverse reactions, you must go to a regular hospital for treatment.