A nurse is performing tracheostomy care for a client and suctioning to remove copious secretions. Which of the following actions should the nurse take?

A. Inverted P wave: An inverted P wave may indicate atrial depolarization abnormalities but is not typically associated with hypokalemia. It can be seen in conditions such as atrial enlargement or atrial ischemia. However, in hypokalemia, the P wave may become flattened or have a decreased amplitude, but it is less likely to be inverted.
B. Wide QRS: A wide QRS complex may indicate conduction abnormalities or bundle branch blocks, but it is not specifically associated with hypokalemia. Wide QRS complexes are more commonly seen in conditions such as bundle branch blocks or electrolyte imbalances like hyperkalemia. Hypokalemia tends to cause a prolongation of the QT interval rather than widening of the QRS complex.
C. Elevated ST segment: An elevated ST segment is typically associated with myocardial injury or infarction, not hypokalemia. It can be indicative of conditions such as myocardial ischemia or pericarditis. In hypokalemia, ST segment changes are more likely to be flattened or depressed rather than elevated.
D. Abnormally prominent U wave: An abnormally prominent U wave is a classic EKG finding in hypokalemia. Hypokalemia prolongs the repolarization phase of the cardiac action potential, leading to the appearance of U waves following the T wave. These U waves can become more pronounced as potassium levels decrease. Therefore, an abnormally prominent U wave is a significant indicator of hypokalemia on an EKG, especially in a patient with prolonged vomiting, which can lead to potassium depletion. Thus, it is the most pertinent abnormality to interpret in this context.

A. Maintain the head of the bed in a flat position for 30 min following medication administration: This option is incorrect because after administering medications through an NG tube, it's crucial to elevate the head of the bed to at least 30 to 45 degrees to minimize the risk of aspiration. Keeping the head of the bed flat increases the likelihood of reflux and aspiration of medication.
B. Mix the three medications together prior to administering: This option is incorrect because mixing medications without specific instructions from the healthcare provider can lead to potential interactions or alterations in the effectiveness of the drugs. Each medication should be administered separately to ensure accurate dosing and prevent potential adverse effects.
C. Rush the NG feeding tube with 30 mL of water immediately: This option is incorrect because while flushing the NG tube with water after medication administration is necessary to ensure that the medications reach the stomach and to prevent tube occlusion, the recommended volume for flushing is typically 30 to 60 mL, not just 30 mL. Using a larger volume of water helps ensure thorough flushing of the tube.
D. Dilute each medication with 10 mL of tap water: This is the correct action. Diluting each medication with 10 mL of tap water is a standard practice to ensure proper administration through an NG tube. Dilution helps prevent tube occlusion and irritation of the gastric mucosa, reducing the risk of complications such as clogging of the tube or local irritation. Additionally, diluting the medications facilitates their passage through the tube and into the stomach, optimizing absorption and effectiveness while minimizing the risk of adverse effects.