How is a reduced pulmonary artery wedge pressure (PCWP) diagnosed? It is usually not particularly difficult to diagnose a reduced pulmonary artery wedge pressure (PCWP). There are a few things to keep in mind. In the case of a recent blood loss. It may not be very obvious by examining the blood. It is hardly noticeable. But if the process of blood loss is a little longer. Then again with the movement of body fluids more and more. Then the symptoms will be more obvious. This makes it easier to diagnose. Usually show the following symptoms. 1, pulmonary artery wedge pressure (PCWP) lowering disease usually shows symptoms are elevated hematocrit, rising hemoglobin, and a large increase in the amount of urea nitrogen. Compared to a normal person. If the blood loss time is longer, the greater the amount of bleeding, the higher the serum sodium will be. 2, for the amount of blood loss will cause the pulmonary artery wedge pressure (PCWP) to reduce the risk of shock in patients. This predicted value is not particularly accurate, and it is worth noting the problem. If the patient loses too much blood, it can lead to the fear of death due to the critical situation. It needs to be improved. 3. The pulmonary artery wedge pressure (PCWP) is measured by the condition of central pressure measurement, and the venous blood oxygen level is low in performance. The blood displacement of the heart is also greatly reduced. The blood pressure is also decreasing. This is a very dangerous time. However, the constriction of blood vessels can lead to disorders in other organs of the patient. Caution: The end result is a very dangerous time. If the resuscitation is not timely. The patient ends up with heart failure, and then other organs also fail in this way. Finally there is a risk of life. I think this is the patient and family members do not want to see the results. Then we should actively take rescue treatment.