Correct!
2. The diaphragm as assessed by ultrasound is normal

The cause of the retained secretions is unclear but diaphragmatic ultrasound and DFT are normal. The diaphragm normally thickens during inspiration. A DFT < 0.36 predicts failure of extubation (3).

Which of the following should be done next? (Click on the correct answer to proceed to the fifth of six pages)

1. Contact the patient’s family
2. Negative pressure ventilation
3. Percutaneous tracheostomy
4. 1 and 3
5. All of the above

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