A nurse is phoning a provider to report a client’s serum potassium of 6.2 mEq/L. Which of the following medications should the nurse expect the provider to prescribe?

Choice A rationale
An indurated area of 4 millimeters is not considered a positive result for tuberculin skin testing. The size of induration considered positive varies based on the individual’s risk factors and health status.
Choice B rationale
The injection site for a tuberculin skin test should be evaluated between 48 and 72 hours after administration, not within 24 hours. Evaluating it too early may not provide accurate results.
Choice C rationale

A positive result in a tuberculin skin test indicates that the person has been infected with TB bacteria, but it does not necessarily mean they have active TB disease. Further tests are needed to determine if the disease is active.
Choice D rationale
A previous negative result does not preclude the administration of a new tuberculin skin test. Individuals can be retested if there is a new risk of exposure or if it is required for medical or occupational reasons.

Choice A rationale
Respiratory alkalosis is incorrect. Respiratory alkalosis is characterized by a high pH and low PaCO₂, which is not consistent with the given ABG values. The client’s pH is low (7.22), indicating acidosis, and the PaCO₂ is high (68 mm Hg), indicating a respiratory cause.
Choice B rationale
Respiratory acidosis is correct. Respiratory acidosis occurs when there is an accumulation of carbon dioxide (CO₂) in the blood, leading to a decrease in pH. The given ABG values show a low pH (7.22) and a high PaCO₂ (68 mm Hg), which are indicative of respiratory acidosis. The elevated bicarbonate (28 mEq/L) suggests partial compensation by the kidneys.
Choice C rationale
Metabolic acidosis is incorrect. Metabolic acidosis is characterized by a low pH and low bicarbonate (HCO₃⁻) levels. In this case, the bicarbonate level is elevated (28 mEq/L), which is not consistent with metabolic acidosis. The primary issue is respiratory, as indicated by the high PaCO₂.
Choice D rationale
Metabolic alkalosis is incorrect. Metabolic alkalosis is characterized by a high pH and high bicarbonate levels. The given ABG values show a low pH (7.22), which indicates acidosis, not alkalosis. Additionally, the primary issue is respiratory, as indicated by the high PaCO₂.