The therapist is evaluating a small tachypneic infant receiving heliox mixture 70:30 through an infant hood.Although the SpO₂ has improved,the child shows signs of worsening work of breathing.What is the most probable mechanism to explain this situation?
A) The FiHe is too low in a 70:30 mixture to change work of breathing in this infant.
B) The flow going through the infant hood is inadequate.
C) A greater concentration of helium is present at the top of the hood and away from the infant's nose and mouth.
D) The infant is breathing too fast;thus heliox is not reaching the airways.
Correct Answer:
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