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???,RR=30?????????/??;
????????????,???=93%;
??????????(PaO2)/??(FiO2)=300,???(?1000?)????PaO2/FiO2?????;
??,?24~48?????????>50%?
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?????(<2????,RR=60???????/?????;2~12?????????,RR=50?????????/????????;1~5???,RR=40???????/????;>5????,RR=30????/???????),????;
?????,???????????=93%;
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??=65???;
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