A patient's PaO2 is 88 mm Hg while on FiO2 of 0.50. What can the nurse conclude about this patient's intrapulmonary shunt?
1. The shunt is estimated to be 176.
2. The shunt is estimated to be 568.
3. The shunt is below the minimum acceptable level.
4. This data has little use in determining oxygenation status of the patient who is retaining CO2.
5. No determination of intrapulmonary shunt can be made from this data.
1, 3
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