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A client has a nasogastric (NG) tube placed during abdominal surgery. During postoperative convalescence, which arterial blood gas values are consistent with metabolic alkalosis?

A.

pH 7.49, PCO₂ 45 mm Hg, HCO₃ 32 mEq/L (32 mmol/L), PO₂ 90 mm Hg.

B.

pH 7.30, PCO₂ 20 mm Hg, HCO₃ 22 mEq/L (22 mmol/L), PO₂ 85 mm Hg.

C.

pH 7.46, PCO₂ 55 mm Hg, HCO₃ 36 mEq/L (36 mmol/L), PO₂ 95 mm Hg.

D.

pH 7.29, PCO₂ 35 mm Hg, HCO₃ 25 mEq/L (25 mmol/L), PO₂ 99 mm Hg.

Answer and Explanation

The Correct Answer is A

Choice A rationale

 

pH 7.49, PCO₂ 45 mm Hg, HCO₃ 32 mEq/L (32 mmol/L), PO₂ 90 mm Hg indicates metabolic alkalosis. The elevated pH and HCO₃ levels are consistent with this condition.

 

Choice B rationale

 

pH 7.30, PCO₂ 20 mm Hg, HCO₃ 22 mEq/L (22 mmol/L), PO₂ 85 mm Hg indicates metabolic acidosis with respiratory compensation, not metabolic alkalosis.

 

Choice C rationale

 

pH 7.46, PCO₂ 55 mm Hg, HCO₃ 36 mEq/L (36 mmol/L), PO₂ 95 mm Hg indicates metabolic alkalosis with respiratory compensation. However, the pH is slightly lower than in Choice A, making Choice A more indicative of metabolic alkalosis.

 

Choice D rationale

 

pH 7.29, PCO₂ 35 mm Hg, HCO₃ 25 mEq/L (25 mmol/L), PO₂ 99 mm Hg indicates metabolic acidosis, not metabolic alkalosis.

 


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View Related questions

Correct Answer is ["B","D","F"]

No explanation

Correct Answer is C

Explanation

Choice A rationale

Monitoring daily urine output volume is important for assessing fluid balance, but it does not directly address the issue of hypernatremia. Hypernatremia is characterized by high sodium levels in the blood, and monitoring urine output alone will not help in managing sodium intake or identifying sources of excess sodium.

Choice B rationale

Using salt tablets after strenuous exercise is not recommended for clients with hypernatremia. Salt tablets can increase sodium levels further, exacerbating the condition. Hypernatremia requires careful management of sodium intake, and salt tablets would be counterproductive.

Choice C rationale

Reviewing food labels for sodium content is crucial for clients with hypernatremia. This helps them identify and avoid foods high in sodium, which can contribute to elevated sodium levels in the blood. Educating clients on reading food labels empowers them to make informed dietary choices and manage their condition effectively.

Choice D rationale

Drinking plenty of water whenever thirsty is a general recommendation for maintaining hydration, but it does not specifically address hypernatremia. Clients with hypernatremia need to focus on managing their sodium intake and ensuring they do not consume excessive amounts of sodium.

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