A client is demonstrating signs of hypoxia. What laboratory value will help the nurse determine the client's degree of effective gas exchange?

1. Blood glucose.
2. Serum potassium.
3. Serum sodium.
4. Arterial blood gas.


Correct Answer: 4
Rationale 1: The blood glucose level is not used to determine a client's degree of effective gas exchange.
Rationale 2: The serum potassium level is not used to determine a client's degree of effective gas exchange.
Rationale 3: The serum sodium level is not used to determine a client's degree of effective gas exchange.
Rationale 4: Blood for partial pressures or blood gases are usually obtained from arterial blood.

Nursing

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