Central venous pressure (CVP) is one of the main indicators used to observe hemodynamics in the clinic. When CVP is measured to be too high, it often suggests that the patient may have heart failure, pulmonary infarction, constrictive pericarditis and other diseases. When the central venous pressure is found to be too high, it may indicate that the infusion rate is too fast or the volume of infusion is too much, and it is necessary to slow down the infusion rate or reduce the volume of infusion. Central venous pressure cannot be used to diagnose disease, but should be used in conjunction with the patient’s symptoms and other tests to make a comprehensive judgment when high central venous pressure is detected. In clinical practice, central venous pressure measurement is often applied to patients undergoing large and medium-sized surgeries, patients in critical condition such as shock, and patients who need to replenish large amounts of fluids quickly or undergo blood transfusion.