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 C
Explanation
Choice A rationale
Securing tracheostomy ties by making knots close to the tube can cause irritation and pressure on the skin.
Choice B rationale
Removing ties to secure a disposable, soft foam collar with hook and loop fastener is not the most important action when changing the ties of the tracheostomy tube.
Choice C rationale
Leaving the old ties in place until the new ones are secure is the most important action to prevent accidental dislodgement of the tracheostomy tube.
Choice D rationale
Placing knots of the ties laterally to prevent irritation and pressure is important but not the most critical action when changing the ties of the tracheostomy tube.
Correct Answer is C
Explanation
Choice A rationale
Potatoes are naturally gluten-free and safe for individuals with celiac disease.
Choice B rationale
Corn chips are also naturally gluten-free and safe for individuals with celiac disease.
Choice C rationale
Oatmeal can be contaminated with gluten during processing, making it unsafe for individuals with celiac disease unless it is certified gluten-free.
Choice D rationale
Fried rice is typically gluten-free, but it is essential to ensure that no gluten-containing ingredients or cross-contamination occurs during preparation.