Taguchi A, Takada K, Suzuki H
Department of Anesthesiology, Tokyo Women's Medical College.
Masui. 1995 Sep;44(9):1269-72.
The systemic and pulmonary vascular resistance needs to be balanced before cardiopulmonary bypass (CPB) and high flow pulmonary circulation must be avoided after CPB during anesthetic management for Norwood's operation. The level of SpO2 was controlled at 75-80% to maintain systemic and pulmonary circulation. The relationship between the change of color of the lung and level of SpO2 through gradual increase of pulmonary blood flow was carefully observed. As SpO2 level increased, lung changed color from white, pink to red. The SpO2 level of lung in red color was above 85%, suggesting high flow pulmonary circulation. To decrease the level of SpO2, FIO2 was decreased. The lung changed to pink and balance of systemic and pulmonary circulation was maintained, reconfirming that control of SpO2 and FIO2 levels is important for this operation.
在诺伍德手术的麻醉管理过程中，体外循环（CPB）前需平衡体循环和肺循环阻力，且CPB后必须避免高流量肺循环。将SpO2水平控制在75 - 80%以维持体循环和肺循环。通过逐渐增加肺血流量，仔细观察肺颜色变化与SpO2水平之间的关系。随着SpO2水平升高，肺颜色从白色、粉色变为红色。肺呈红色时SpO2水平高于85%，提示高流量肺循环。为降低SpO2水平，降低吸入氧分数（FIO2）。肺变为粉色，体循环和肺循环维持平衡，再次证实控制SpO2和FIO2水平对该手术很重要。
