The nurse observes the following EKG. Which lab would the nurse correlate with this finding?
Na + 134
K+ 6.1
K+ 2.1
Mg+ 18
The Correct Answer is C
A. Mild hyponatremia (Sodium < 135 mEq/L) typically does not produce distinctive ECG changes. This value is unlikely to correlate with the presence of U waves.
B. Hyperkalemia (Potassium > 5.0 mEq/L) is associated with peaked T waves, widened QRS complexes, and flattened or absent P waves, not U waves.
C. Hypokalemia (Potassium < 3.5 mEq/L) is the primary cause of U waves. A potassium level of 2.1 mEq/L is significantly low and can result in ECG changes, including U waves, ST segment depression, and prolonged QT intervals. These changes reflect altered ventricular repolarization.
D. Hypermagnesemia (Magnesium > 2.5 mEq/L) can cause ECG changes such as prolonged PR and QRS intervals, bradycardia, and heart block. However, such an extreme magnesium level of 18 mEq/L would cause severe toxicity and is not associated with U waves.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Finasteride does not need to be taken on an empty stomach.
B. Finasteride can cause harm to a developing male fetus, and pregnant women should avoid handling it to prevent potential absorption through the skin.
C. Finasteride is an oral medication and is not administered as an intramuscular injection.
D. Hair loss is not a common adverse effect of finasteride; in fact, it is used to treat hair loss in men with benign prostatic hyperplasia.
Correct Answer is A
Explanation
A. This statement indicates that the client may not fully understand the care required for the drainage tubes. Drainage tubes typically do not "fall out" on their own; they need to be removed by a healthcare provider. The client should be instructed to care for the tubes, monitor drainage, and report any concerns to their healthcare provider.
B. It is appropriate to measure the drainage each day and report it if it exceeds the expected amount. This helps ensure that the surgical site is healing properly.
C. The client should be cautious with the positioning of the drainage tubes to avoid kinking or pulling, which could interfere with drainage and cause complications.
D. A foul odor from the drainage could indicate an infection, so it is appropriate for the client to contact their primary healthcare provider if this occurs.
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