AQP1 and pulmonary edema: In the experiment, the expression of AQP1 in the dexmedetomidine group was enhanced, which can promote the flow of liquid inside and outside the cell membrane, enhance the body's ability to remove excessive edema liquid in the alveolar cavity and interstitial lung, improve the fluid balance in the lung, reduce the accumulation of water, prevent pulmonary edema, and improve the prognosis.