A patient with known COPD is admitted with a 4-day history of productive cough, fever and breathlessness.
A patient with known COPD is admitted with a 4-day history of productive cough, fever and breathlessness. He is given a trial of nebulisers, IV hydrocortisone and IV antibiotics.
CXR is shown below.

Serial ABG results are as follows:
ABG on admission (on 0.6 Fᵢ02)
| pH | 7.28 |
| Pco2 | 6.5 |
| Po2 | 8 |
| HCO3 | 28 |
Repeat ABG after initial management (on 0.45 FᵢO2)
| pH | 7.25 |
| Pco2 | 6.8 |
| Po2 | 7.8 |
| HCO3 | 28 |
He is now more confused with a flapping tremor in both his hands. NIV is considered the next best option.
What possible contraindication will be a hindrance to using NIV?
Select the SINGLE most appropriate option from the list below. Select ONE option only.
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