The client presents with PaO2 of 54 mmHg and an arterial oxygen saturation of 80%. The nurse recognizes that which of the following is the most likely cause for this type of acute respiratory failure?
1. Pneumothorax
2. Oversedation
3. Cervical spinal cord injury
4. Obesity
Pneumothorax
Rationale: A PaO2 of 54 mmHg and an arterial oxygen saturation of 80% are indicative of hypoxemic respiratory failure and can be caused by conditions that would lower the oxygen content of the client. In this instance, a pneumothorax would likely be the cause. Oversedation and obesity are likely causes of hypercapnia respiratory failure. Cervical spinal cord injury would result in the central nervous system as a cause.
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