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 A
Explanation
Choice A rationale
For long-term control of normal eye pressure is the accurate response. Open-angle glaucoma is a chronic condition that requires ongoing treatment to maintain normal intraocular pressure and prevent further damage to the optic nerve. Eye drops are typically used for life to manage the condition.
Choice B rationale
Until a smaller angle can be restored is not accurate because open-angle glaucoma does not involve a change in the angle of the anterior chamber. The goal of treatment is to lower intraocular pressure, not to restore the angle.
Choice C rationale
For long-term control of pain and swelling is not accurate because open-angle glaucoma primarily involves increased intraocular pressure and optic nerve damage, not pain and swelling. The goal of treatment is to lower intraocular pressure.
Choice D rationale
Until the excess pressure is reduced is not accurate because open-angle glaucoma requires ongoing treatment to maintain normal intraocular pressure. Stopping treatment once pressure is reduced can lead to a recurrence of elevated pressure and further damage.
Correct Answer is D
Explanation
Choice A rationale
Determining the neurological baseline prior to the fall is important but not the immediate priority. The client’s current confusion and projectile vomiting suggest a potential acute condition that needs immediate assessment.
Choice B rationale
Determining the client’s last dose of corticosteroids is relevant for managing multiple sclerosis but does not address the immediate concern of confusion and vomiting.
Choice C rationale
Administering a PRN IV antiemetic as prescribed can help manage vomiting but does not address the underlying cause of the symptoms.
Choice D rationale
Completing a head-to-toe neurological assessment is the priority intervention. The client’s confusion and projectile vomiting could indicate increased intracranial pressure or another acute neurological condition that requires immediate attention.