有关ASA分级与麻醉死亡率哪一项是正确的()

A．American Society of Anesthesiologists
B．American Stomatological Association
C．American Surgical Association
D．American Standard Association
E．American Statistical Association

A．麻醉手术危险性很大
B．重要脏器病变严重，虽在代偿范围，但对麻醉手术的耐受性差
C．重要脏器轻度病变，代偿健全，对麻醉手术的耐受性差一般
D．各器官功能正常，对麻醉手术的耐受性差良好
E．重要脏器病变严重，功能代偿不全并已威胁生命安全，麻醉手术均有危险