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A patient has the following blood gases: PaCO2 33, pH 7.50, HCO3 23. Which of the following could NOT be the cause of this condition?

A.

Aspirin toxicity

B.

Fever

C.

Anxiety attack

D.

Chronic obstructive pulmonary disease (COPD)

Answer and Explanation

The Correct Answer is D

A.    Aspirin Toxicity:
Effect on Blood Gases: Aspirin toxicity can cause respiratory alkalosis due to increased respiratory rate (hyperventilation), leading to a decreased PaCO2 and increased pH.
Relation to Given Blood Gases: It could potentially cause the observed blood gas values (low PaCO2 and high pH), making it a possible cause.

B.    Fever:
Effect on Blood Gases: Fever might cause hyperventilation, resulting in respiratory alkalosis with decreased PaCO2 and increased pH.
Relation to Given Blood Gases: It could potentially cause the observed blood gas values.

C.    Anxiety Attack:
Effect on Blood Gases: Anxiety attacks can lead to hyperventilation and subsequent respiratory alkalosis with low PaCO2 and high pH.
Relation to Given Blood Gases: It could potentially cause the observed blood gas values.

D.    Chronic Obstructive Pulmonary Disease (COPD):
Effect on Blood Gases: COPD typically causes respiratory acidosis due to impaired gas exchange, resulting in elevated PaCO2 and decreased pH.
Relation to Given Blood Gases: COPD wouldn't typically cause the observed blood gas values of low PaCO2 and high pH.
 


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Related Questions

Correct Answer is B

Explanation

A. 30 minute onset; 2-hour duration: This does not accurately represent the onset and peak action time of Insulin Lispro.

B. 15 minute onset; 30-60 minutes peak: This is correct. Insulin Lispro has a rapid onset (starts working within 15 minutes) and a peak action time of 30-60 minutes after administration.

C. 2-hour onset; 12-hour duration: This is not accurate for rapid-acting insulin. Rapid-acting insulin has a much quicker onset and shorter duration compared to this option.

D. 15 minute onset; no peak (continuous): While the onset time is correct, stating "no peak" is not entirely accurate. Rapid-acting insulin does have a peak, but it's relatively short, occurring within the first hour after administration.

Correct Answer is B

Explanation

A. Increase the intake of vitamin E to enhance absorption:
Explanation: Iron absorption can be enhanced by taking vitamin C, not vitamin E. Therefore, this statement is not accurate.
B. Iron will cause the stools to darken in color:
Explanation: This statement is accurate. Iron supplements can cause stools to become darker in color. This is a common and harmless side effect.

C. Take the iron with dairy products to enhance absorption:
Explanation: Calcium-containing foods and supplements can inhibit the absorption of iron. Therefore, it is recommended to avoid taking iron supplements with dairy products.

D. Limit foods high in fiber due to the risk for diarrhea:
Explanation: Iron supplements can cause constipation, not diarrhea. Therefore, limiting foods high in fiber is not necessary.

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