The reason PaO2 falls with increasing altitude is because the FIO2 falls. A patient is found to have interstitial lung disease on chest x-ray. It is the most common physiologic cause of hypercapnia. It can cause hypoxemia without hypercapnia because the O2 dissociation curve is shaped differently than the CO2 dissociation curve. L. No arterial blood gas is obtained.
Electrolytes indicate the presence of metabolic acidosis.
Electrolytes indicate the presence of both metabolic acidosis and metabolic alkalosis. Episodes of apnea may occur in REM and nonREM sleep. The multiple sleep latency test will show early onset of REM sleep. You hear a few crackles over her right lower lung. She is a non-smoker.