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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 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.

Correct Answer is A

Explanation

Choice A rationale

Corneal abrasion is a contraindication for the use of ophthalmic ketorolac. Ketorolac is a nonsteroidal anti-inflammatory drug (NSAID) that can delay healing and increase the risk of further damage to the cornea.

Choice B rationale

Chemical burns are not a primary contraindication for ophthalmic ketorolac. However, the treatment of chemical burns typically involves other specific interventions, and the use of ketorolac should be carefully considered.

Choice C rationale

Radiation exposure is not a direct contraindication for the use of ophthalmic ketorolac. The medication is used to reduce inflammation and pain, which may be beneficial in managing symptoms related to radiation exposure.

Choice D rationale

A foreign body in the eye is not a primary contraindication for ophthalmic ketorolac. However, the foreign body should be removed, and the eye should be thoroughly examined before administering any medication.

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