A client has a nasogastric (NG) tube placed during abdominal surgery. During postoperative convalescence, which arterial blood gas values are consistent with metabolic alkalosis?
pH 7.49, PCO₂ 45 mm Hg, HCO₃ 32 mEq/L (32 mmol/L), PO₂ 90 mm Hg.
pH 7.30, PCO₂ 20 mm Hg, HCO₃ 22 mEq/L (22 mmol/L), PO₂ 85 mm Hg.
pH 7.46, PCO₂ 55 mm Hg, HCO₃ 36 mEq/L (36 mmol/L), PO₂ 95 mm Hg.
pH 7.29, PCO₂ 35 mm Hg, HCO₃ 25 mEq/L (25 mmol/L), PO₂ 99 mm Hg.
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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Correct Answer is B
Explanation
Choice A rationale
Teaching anxiety reduction methods for feelings of suffocation is important but not the most immediate action needed to address the client’s respiratory symptoms.
Choice B rationale
Increasing the daily intake of oral fluids to liquefy secretions is the most important action for the nurse to instruct the client about self-care. This helps to thin the mucus, making it easier to expectorate and improving breathing.
Choice C rationale
Calling the clinic if undesirable side effects of medications occur is important but not the most immediate action needed to address the client’s respiratory symptoms.
Choice D rationale
Avoiding crowded enclosed areas to reduce pathogen exposure is important but not the most immediate action needed to address the client’s respiratory symptoms.
Correct Answer is A
Explanation
Choice A rationale
Reviewing with the client the need to avoid foods rich in milk and cream is crucial. Dairy products can increase gastric acid secretion, which can exacerbate duodenal ulcers.
Choice B rationale
Suggesting frequent small meals can help reduce discomfort but does not address the issue of dairy products exacerbating the ulcer.
Choice C rationale
Switching to decaffeinated coffee and tea is beneficial but not as critical as avoiding dairy products.
Choice D rationale
Reinforcing teaching by asking the client to list dairy foods does not address the need to avoid these foods.