單項(xiàng)選擇題心胸比值大于多少應(yīng)視為高危病人()

A.0.5
B.0.55
C.0.6
D.0.65
E.0.7


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2.單項(xiàng)選擇題正常成人屏氣時(shí)間應(yīng)為多少()

A.>30s
B.>35s
C.>40s
D.>45s
E.>60s

3.單項(xiàng)選擇題年齡小于3個(gè)月的嬰兒,術(shù)前血紅蛋白宜超過()

A.90g/L
B.95g/L
C.100g/L
D.105g/L
E.110g/L

4.單項(xiàng)選擇題血細(xì)胞比容保持在多少有利于氧的釋放()

A.25%~35%
B.25%~30%
C.30%~35%
D.35%~40%
E.30%~40%

5.單項(xiàng)選擇題擇期術(shù)前成人血紅蛋白不宜低于()

A.70g/L
B.80g/L
C.85g/L
D.90g/L
E.95g/L