ABGs are drawn on a patient. The results are: pH = 7.30. PCO2 = 50, PO2 = 80. HCO3 = 25. What mechanism might cause this disturbance?

Bleeding in the brain.

Anxiety.

Kidney failure.

Extreme vomiting.

Answer and Explanation

The Correct Answer is C

A. Bleeding in the brain could cause neurological symptoms but does not directly correlate with the respiratory acidosis indicated by the ABGs.

B. Anxiety typically leads to respiratory alkalosis due to hyperventilation, which does not align with the results showing acidemia.

C. The ABG results indicate a primary respiratory acidosis (low pH and elevated PCO2), which can occur in kidney failure due to the kidneys' inability to excrete acids and manage bicarbonate, leading to an accumulation of CO2.

D. Extreme vomiting is associated with metabolic alkalosis due to loss of gastric acid, which does not explain the acid-base disturbance presented.

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Correct Answer is B

Explanation

A. Accessory muscle use is a response to respiratory distress, not the underlying cause of asthma symptoms.

B. Asthma causes inflammation and swelling of the bronchial lining, which narrows the airways and makes it difficult to exhale air from the lungs, leading to prolonged expiration and wheezing.

C. Destruction of elastic recoil is associated with chronic lung conditions like emphysema, not asthma.

D. Stiff alveoli and fluid-filled lungs are more characteristic of restrictive lung diseases or pulmonary edema, not asthma.

A. Varicose veins. B. Thick green sputum. C. Hypertension. D. Sudden dyspnea.

Correct Answer is D

Explanation

A. While varicose veins can be a risk factor for deep vein thrombosis (DVT), which in turn can lead to a PE, they are not an acute symptom of a PE.

B. Thick green sputum is more indicative of a respiratory infection, such as pneumonia, rather than a pulmonary embolus.

C. Hypertension can be seen in various conditions but is not a primary indicator of PE.

D. Sudden dyspnea (difficulty breathing) is a classic sign of a pulmonary embolus, as the clot obstructs blood flow to the lungs, leading to respiratory distress.

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ABGs are drawn on a patient. The results are: pH = 7.30. PCO2 = 50, PO2 = 80. HCO3 = 25. What mechanism might cause this disturbance?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is D

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