Post-central venous puncture care is mainly carried out in the following aspects: 1. Proper fixation is carried out to avoid the central venous catheter slipping off, and patients with cognitive impairment sometimes need to restrain their hands appropriately so as not to pull out the central venous catheter when they are not quite conscious; 2. Preventing infections: to ensure that the central venous puncture point as well as the area around the catheter are clean and dry, and generally need disinfectant solution for disinfectant care every 2-3 days; 3, Prevent local thrombosis, if thrombus occurs, the thrombus should not be strongly pushed in, because the central venous catheter is placed at the entrance of the right atrium of the superior vena cava, and if the already formed thrombus is violently pushed and injected inside, it may result in pulmonary infarction as a serious complication.