After the pulmonary artery catheterization intervention, you need to pay attention to observe whether there are hematomas, whether there is bleeding and the color of urine, etc., and notify the doctor promptly if there is any abnormality. 1. Observe whether there is hematoma: it mainly refers to whether there is hematoma at the puncture point of the blood vessel in the leg, if there is hematoma, it may form a pseudo ventricular wall tumor if it is not treated as soon as possible. 2. Observe whether there is bleeding under the skin: after the intervention treatment, it is easy to lead to the reduction of platelets or destruction of platelets, thus causing the risk of bleeding, once bleeding occurs, it needs to be treated in time. 3. Observe the color of urine: after inserting the occluder, the local blood flow of the pulmonary artery is faster, and some patients may have hemolysis (red blood cell rupture), at this time, the color of urine may show soy sauce-like color, if you find any abnormality in the urine, you should inform the doctor as soon as possible. After pulmonary artery catheterization intervention, patients should strictly follow the doctor’s instructions to observe the precautions, which is conducive to accelerate the recovery of the body.