A.2:01 B.1:01 C.3:01 D.1:02
A.10% ~ 20% B.15% ~ 25% C.35% ~ 45% D.25% ~ 35%
A.全稱是長(zhǎng)期家庭氧療 B.主要指證是PaO2<60mmHg C.氧流量控制在1 ~ 2L/min,每日吸氧時(shí)間≥15h/d D.氧療目標(biāo)是使SaO2>90%,并且CO2潴留無(wú)明顯加重