A nurse is collecting data from a client who has hypokalemia as a result of nausea, vomiting, and diarrhea.
Which of the following findings should the nurse expect?

Choice A rationale:

Metabolic alkalosis Metabolic alkalosis is characterized by an elevated pH (above the normal range of 7.35-7.45) and an increased bicarbonate (HCO3) level (above the normal range of 22-28 mEq/L). In this case, the client's pH of 7.6 and HCO3 level of 32 mEq/L indicate a primary metabolic alkalosis. It can be caused by excessive bicarbonate intake, loss of acid (as in vomiting or excessive diuretic use), or other factors that result in an excess of bicarbonate in the body. The PaCO2 level is within the normal range (35-45 mm Hg), which is consistent with compensatory hypoventilation seen in metabolic alkalosis.

Choice B rationale:

Metabolic acidosis Metabolic acidosis is characterized by a decreased pH and bicarbonate level. The client's ABG results do not align with metabolic acidosis. In this case, the pH is elevated, and the bicarbonate level is above the normal range.

Choice C rationale:

Respiratory alkalosis Respiratory alkalosis is characterized by an elevated pH and decreased PaCO2. The client's ABG results show a normal PaCO2 of 40 mm Hg, which does not align with respiratory alkalosis. In respiratory alkalosis, you would typically see a lower PaCO2.

Choice D rationale:

Respiratory acidosis Respiratory acidosis is characterized by a decreased pH and elevated PaCO2. The client's ABG results do not align with respiratory acidosis. In this case, the PaCO2 is within the normal range, and the pH is elevated, which is not indicative of respiratory acidosis.

The correct answer is choiceA. Heart rate 50/min.

Choice A rationale:

Atenolol is a beta-blocker that can significantly lower heart rate.A heart rate of 50/min is considered bradycardia (slow heart rate), and administering atenolol could further decrease the heart rate to a dangerously low level. Therefore, the nurse should withhold the medication in this case.

Choice B rationale:

A respiratory rate of 18/min is within the normal range (12-20 breaths per minute) and does not contraindicate the use of atenolol. Therefore, this finding would not require withholding the medication.

Choice C rationale:

An oxygen saturation of 95% is within the normal range (typically 95-100%) and does not contraindicate the use of atenolol. Thus, this finding would not necessitate withholding the medication.

Choice D rationale:

While a blood pressure of 160/94 mm Hg indicates hypertension, atenolol is often prescribed to manage high blood pressure. Therefore, this finding would not require withholding the medication.