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 C

Explanation

A. Hypokalemia causes hyperpolarization, not hypopolarization, making it more difficult for cells to reach an action potential.

B. Hypokalemia does not stimulate the vagus nerve but can lead to arrhythmias.

C. While hypokalemia can cause arrhythmias, it usually leads to tachycardia or other irregular rhythms rather than a bradycardic rate of 40 beats per minute.

D. Low potassium levels can lead to tachycardia (e.g., a heart rate of 150 beats per minute) and other dangerous arrhythmias due to increased irritability of cardiac cells.

A. benign prostatic hypertrophy (BPH). B. ovarian cancer. C. a kidney stone. D. a chlamydia infection.

Correct Answer is D

Explanation

A. Benign prostatic hypertrophy is a condition affecting the prostate in men, so it is not applicable in this case.

B. Ovarian cancer may cause pelvic pain, but the specific symptoms of abnormal discharge and acute pain suggest a more immediate infection rather than cancer.

C. A kidney stone typically presents with flank pain and may cause urinary symptoms, but it would not typically cause vaginal discharge.

D. A chlamydia infection can cause abnormal vaginal discharge and pelvic pain, and it is a common sexually transmitted infection presenting with these symptoms, consistent with the patient's history.

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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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