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
Serum blood glucose level is not directly related to the presence of purulent drainage at a wound site. While blood glucose levels can affect wound healing, they do not provide specific information about the presence of infection.
Choice B rationale
Culture for sensitive organisms is the most appropriate laboratory value to note when purulent drainage is observed. This test helps identify the specific bacteria causing the infection and determines the most effective antibiotics for treatment.
Choice C rationale
C-reactive protein (CRP) level is a marker of inflammation and can indicate the presence of an infection, but it does not provide specific information about the bacteria causing the infection.
Choice D rationale
Blood pH level is not directly related to the presence of purulent drainage at a wound site. While blood pH can be affected by severe infections, it is not a specific indicator of wound infection.
Correct Answer is B
Explanation
Choice A rationale
Providing step-by-step verbal directions may not be effective for clients with Huntington’s disease due to their cognitive impairments, which can include forgetfulness, impaired judgment, and difficulty concentrating.
Choice B rationale
Escorting the client to the cafeteria is the best approach as it ensures the client reaches the destination safely. Clients with Huntington’s disease often have unsteady gait and involuntary movements, making it difficult for them to navigate independently.
Choice C rationale
Orienting the client to the color-coding system may not be effective due to the cognitive impairments associated with Huntington’s disease, such as difficulty concentrating and impaired judgment.
Choice D rationale
Using the hospital map to show the client where the cafeteria is located is not practical for clients with Huntington’s disease due to their cognitive impairments, which can include forgetfulness and difficulty concentrating.