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[What are abnormal values?] Which is more important, SpO2 or PaO2? [Is too high also bad?]

SpO2 and PaO2 are both indicators of oxygenation, aren't they? The barrier to entry is likely lower for SpO2, isn't it? From clinics to hospitals, from outpatient to inpatient care, and furthermore, ...
BMJ

Optimization of Inspired Oxygen during Mechanical Ventilation (OPTI-OXYGEN): rationale and design of a pragmatic randomised controlled trial

Introduction Targeted oxygenation protocols in mechanically ventilated patients are critical in avoiding the deleterious effects of hypoxaemia and hyperoxaemia. Peripheral oxygen saturation (SpO2) is ...
Europe PMC

Evaluation of PaO2 /FiO2 and SaO2 /FiO2 ratios in postoperative dogs recovering on room air or nasal oxygen insufflation.

To evaluate partial pressure of oxygen in arterial blood/fractional percentage of inspired oxygen (PaO2 /FiO2 ) and SaO2 /FiO2 ratios (where SaO2 is percentage of oxyhemoglobin saturation in arterial ...
note

Thinking 'SpO2 is maintained so oxygen is sufficient' is now dangerous — Why Hb is more important than PaO2

Thinking 'It's okay because SpO2 is 98%' or 'It's okay because I increased oxygen administration and raised PaO2.' I think these kinds of judgments are often made in clinical practice. However, I will ...