A client who is NPO has an order for 1000 mL of D5W 0.45% NS with 40 mEq of potassium over 24 hours.
How many mL/h should the IV pump be programmed for?

Math instructions: IV calculations: (rate-mL/hr).

Although some IV pumps do allow calibration to the tenth or hundredth, for the purpose of exams, IV rate calculations will be rounded to the nearest whole number.

The correct answer is A. 42 mL/h.

Choice A: 42 mL/h

Reason: To calculate the IV rate, we use the formula: IV rate (mL/h) = Total volume (mL) ÷ Total time (hours). For this problem, the total volume is 1000 mL and the total time is 24 hours. Therefore, the calculation is 1000 mL ÷ 24 hours = 41.6667 mL/h. When rounded to the nearest whole number, the IV rate is 42 mL/h. This makes 42 mL/h the correct answer.

Choice B: 44 mL/h

Reason: This choice is incorrect because it does not match the calculated IV rate. The calculation of 1000 mL ÷ 24 hours results in 41.6667 mL/h, which rounds to 42 mL/h, not 44 mL/h. Therefore, 44 mL/h is not a valid option based on the given data.

Choice C: 46 mL/h

Reason: This choice is also incorrect. The calculated IV rate of 41.6667 mL/h, when rounded to the nearest whole number, is 42 mL/h. There is no mathematical basis for rounding up to 46 mL/h from 41.6667 mL/h, making this choice invalid.

Choice D: 48 mL/h

Reason: This choice is incorrect as well. The correct calculation yields 41.6667 mL/h, which rounds to 42 mL/h. There is no justification for rounding up to 48 mL/h. This choice does not align with the calculated and rounded IV rate.

Oliguria is the term for a urine output less than 400 mL per day. This can indicate dehydration, kidney failure, urinary obstruction, or other conditions that affect urine production.

Choice A is wrong because anuria is the term for a urine output less than 100 mL per day.

This is a more severe form of oliguria and can indicate complete kidney failure or urinary obstruction.

Choice C is wrong because polyuria is the term for a urine output more than 3000 mL per day.

This can indicate diabetes mellitus, diabetes insipidus, diuretic use, or excessive fluid intake.

Choice D is wrong because dysuria is the term for painful or difficult urination.

This can indicate urinary tract infection, kidney stones, bladder inflammation, or other conditions that affect the urinary tract.