A nurse is caring for a client who is receiving an IV medication and has a prescription for peak and trough blood levels with the next dose scheduled for 1800. The nurse should expect the lab to draw blood samples at which of the following times?

1630 and 1930

1100 and 1700

1400 and 2200

1745 and 1830

Answer and Explanation

The Correct Answer is A

A. 1630 and 1930: Peak and trough levels are used to monitor drug effectiveness and prevent toxicity. Trough levels (lowest drug concentration) are drawn right before the next dose-1745 would be slightly too late. Peak levels (highest drug concentration) are drawn 30-60 minutes after administration (for IV drugs). Since the next dose is at 1800, the trough should be drawn just before the dose (1630) and the peak should be drawn 30-60 minutes after the dose (1930).

B. 1100 and 1700- Incorrect timing, not close to dose administration.

C. 1400 and 2200- Too far from the scheduled 1800 dose.

D. 1745 and 1830- Trough is too close to administration, peak is too early.

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Correct Answer is D

Explanation

A. Sodium 148: This represents mild hypernatremia, but sodium levels are not the primary concern for cardiac monitoring.

B. Potassium 3.1: This is hypokalemia (low potassium), not hyperkalemia.

C. Sodium 130: This represents hyponatremia, which can cause neurological symptoms, not hyperkalemia.

D. Potassium 5.7: Hyperkalemia is defined as K⁺ >5.0 mEq/L. Levels above 5.5 can cause dangerous cardiac dysrhythmias, requiring ECG monitoring.

A. Trailing B. Double C. Leading D. Decimal point

Correct Answer is C

Explanation

A. Trailing: Incorrect because trailing zeros (e.g., 5.0 mg) should be avoided, as 5.0 mg could be misread as 50 mg.

B. Double: Not relevant to numeric safety measures.

C. Leading: A leading zero (e.g., 0.5 mg instead of .5 mg) helps prevent medication errors. Without a leading zero, .5 mg could be misread as 5 mg, leading to a dangerous overdose.

Correct Answer: C

D. Decimal point: This refers to the proper use of decimal points in dose documentation. While using decimal points is critical, this alone doesn’t address all potential errors related to formatting (e.g., leading or trailing zeros).

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A nurse is caring for a client who is receiving an IV medication and has a prescription for peak and trough blood levels with the next dose scheduled for 1800. The nurse should expect the lab to draw blood samples at which of the following times?

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