When Should Initiation of Noninvasive Ventilation Be Considered in Patients

question 18

Multiple Choice

When should initiation of noninvasive ventilation be Considered in patients with Duchenne's muscular dystrophy
I.Forced vital capacity is less than 50% predicted.
II.Abnormal sleep study suggesting hypoventilation and hypercarbia
III.SpO₂ is less than 95% while awake.
IV.Maximal expiratory pressure is less than 40 cm H₂O.

• A)I and II
• B)I, III, IV
• C)II and III
• D)I, II, III, IV

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