【名词&注释】
氯离子(chloride ion)、乙酰胆碱(acetylcholine)、离子对(ion pair)、钠离子(sodium ion)、吸入麻醉药(volatile anesthetics)、代谢性酸中毒(metabolic acidosis)、肥胖者(obesity subjects)
[单选题]麻醉前对病人的分级,其ASA的意义为()
A. American Society of Anesthesiologists
B. American Stomatological Association
C. American Surgical Association
D. American Standard Association
E. American Statistical Association