Research on Circulation Management Strategy Based on Oxygen Metabolism Balance After CHD Surgery

"The oxygen extraction rate immediately after CPB is set as E1, the oxygen extraction rate at 4 hours after surgery is E2, and the oxygen extraction rate at 8 hours after surgery is E3. A goal-directed treatment strategy based on oxygen supply and consumption balance is defined as: Combined with the value of E2 at 4 hours after CPB, the increasing oxygen consumption (VO2) after CPB is compensated by increasing oxygen delivery (DO2) to different degrees. The goal of E3 not increasing significantly compared with E1 is achieved at 8 hours after CPB, and the severity of low cardiac output is finally reduced within the golden 8 hours after CPB."

Ventilation support is adjusted to maintain arterial oxygen partial pressure and oxygen saturation. Appropriate fluid infusion to stabilize central venous pressure and ensure preload; Combined use of vasoactive drugs to maintain heart rate and blood pressure; Appropriate diuresis can improve urine output and reduce cardiac afterload. Blood transfusion is used to improve coagulation function and maintain appropriate hematocrit.