A nurse is reviewing the laboratory values for a client who has heart failure and is taking bumetanide for diuresis. For which of the following results should the nurse notify the provider?
Potassium 2.3 mEq/L (3.5-5)
Magnesium 14 mEq/L (1.3-2.1)
Carcum to mg/dL (9.9-10.5)
Sodium 136 mEq/L (136-145)
The Correct Answer is A
A. Potassium 2.3 mEq/L (3.5-5.0): This is a severely low potassium level (hypokalemia), which can cause dangerous arrhythmias, especially in a client with heart failure. Bumetanide is a loop diuretic, which can deplete potassium levels.
B. Magnesium 1.4 mEq/L (1.3-2.1): Although the magnesium level is on the lower end of normal, it is not a critical value, and the primary concern here is the potassium level.
C. Calcium 10 mg/dL (9.9-10.5): This is a normal calcium level, so there is no need to notify the provider based on this result.
D. Sodium 136 mEq/L (136-145): This is a normal sodium level, so it would not warrant notifying the provider. The critical concern is the hypokalemia.
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Related Questions
Correct Answer is D
Explanation
A. Serum sodium level of 140 mEq/L (136-145): A sodium level of 140 mEq/L is within the normal range and does not warrant withholding furosemide.
B. Serum potassium level of 4.8 mEq/L (3.5-5.0): A potassium level of 4.8 mEq/L is also within the normal range, and this finding would not be a reason to withhold furosemide.
C. Oxygen saturation of 95%: An oxygen saturation of 95% is within normal limits and would not be a contraindication to administering furosemide.
D. Blood pressure of 80/40 mm Hg: Furosemide is a potent diuretic that can further lower blood pressure. A blood pressure of 80/40 mm Hg is already hypotensive, and administering furosemide could exacerbate this, potentially leading to shock. Therefore, the medication should be withheld.
Correct Answer is C
Explanation
A. PR interval: The PR interval represents the time from the onset of atrial depolarization to the onset of ventricular depolarization, not the duration of ventricular depolarization.
B. ST segment: The ST segment represents the period between ventricular depolarization and repolarization. It does not indicate the time of depolarization.
C. QRS complex: The QRS complex represents ventricular depolarization, which is the electrical activity that causes the ventricles to contract.
D. QT interval: The QT interval represents the time it takes for both ventricular depolarization and repolarization, not just depolarization.
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