A nurse is reviewing the EKG strip of a client who has prolonged vomiting. Which of the following abnormalities on the client's EKG should the nurse interpret as a sign of hypokalemia?
Inverted P wave
Wide ORS
Elevated ST segment
Abnormally prominent U wave
The Correct Answer is D
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.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. The client who has a chest tube to water seal: A chest tube to water seal is primarily used to drain air or fluid from the pleural space. While the client with a chest tube may experience electrolyte imbalances due to fluid loss, hypokalemia is not directly associated with this type of drainage system.
B. The client who has a nasogastric (NG) tube to suction: Clients with nasogastric tubes to suction may experience hypokalemia due to the loss of gastric contents, which contain potassium. Suctioning removes gastric secretions, including potassium, from the body, leading to the risk of electrolyte imbalances such as hypokalemia.
C. The client who has an indwelling urinary catheter to gravity drainage: Gravity drainage of urine via an indwelling urinary catheter does not typically lead to significant potassium loss. While urinary catheterization may carry a risk of electrolyte imbalances over time, it is not as directly associated with hypokalemia as suctioning gastric contents.
D. The client who has a tracheostomy tube attached to humidified oxygen: Humidified oxygen delivery through a tracheostomy tube does not directly affect potassium levels. While clients receiving oxygen therapy may have other respiratory-related issues, hypokalemia is not typically a concern related to this type of therapy.
Correct Answer is B
Explanation
A. Pancrelipase 500 units/kg PO three times daily with meals: Pancrelipase is an enzyme replacement therapy used to aid in the digestion of fats, proteins, and carbohydrates in clients with pancreatic insufficiency. However, in acute pancreatitis, the pancreas is inflamed and typically unable to produce sufficient enzymes. Therefore, enzyme replacement therapy is not typically initiated during the acute phase of pancreatitis.
B. Pantoprazole 80 mg IV bolus twice daily: This is the correct answer. Pantoprazole is a proton pump inhibitor (PPI) that reduces gastric acid secretion. It is commonly prescribed in acute pancreatitis to decrease gastric acid production and reduce pancreatic enzyme activity, thereby promoting pancreatic rest and reducing further pancreatic inflammation and injury.
C. Initiate a low-residue diet: In acute pancreatitis, clients are typically kept NPO (nothing by mouth) initially to allow the pancreas to rest and inflammation to decrease. Once oral intake is resumed, a low-fat, easily digestible diet is usually recommended. However, the initiation of a low-residue diet is not typically indicated during the acute phase of pancreatitis.
D. Ambulate twice daily: While early ambulation is generally encouraged in hospitalized clients to prevent complications such as deep vein thrombosis and pneumonia, ambulation may be limited initially in clients with acute pancreatitis due to pain and discomfort. Ambulation is not typically a priority during the acute phase of pancreatitis; instead, pain management and supportive care are emphasized.
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