A 70 year old female is brought to your ED by ambulance after being found by her husband on the floor of her home.

Vitals:

BP 150/70

PR 95/min

RR 14/min

Her ABG (FiO2 0.5) shows:

pH   7.40   (7.36-7.44)

pCO2  89.2  mmHg

pO2    207  mmHg

HCO3   56.1  mmol/l     (24 +/- 2)

BE    27.5   (-2 -> +2)

Questions:

1. Describe the abnormalities

2. List possible causes

3. How would you manage her?