The precautions to be taken when inserting an indwelling needle include paying attention to the site of the needle, changing it regularly, paying attention to the sealing of the tube, and paying attention to the observation of the infusion process. 1. The site of the needle: If you are playing with the needle, you usually have to pay attention to the site of the needle, to choose the site that can not casually carry out large-scale activities, although the needle is a hose, if the large-scale activities may lead to local blood vessel rupture, especially in the elderly people who have fragile blood vessel walls are more common. 2. Regular replacement: the mouth of the needle must be sterilized regularly, and if it is left in place for too long, it needs to be replaced regularly. 3. Pay attention to sealing the tube: if there is no new injection solution after infusion, heparin must be used to seal the tube. 4. Pay attention to observation during the infusion: if the intravenous fluid dripping during the injection appears to flow more slowly, it may be the case that the indwelling needle is clogged, and it needs to be replaced in time. After playing the indwelling needle should pay attention to explain to the patient to try to pay attention to the puncture arm do not engage in physical labor, avoiding water. If there are any symptoms of discomfort, you must promptly inform the medical staff.