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.
42 mL/h.
44 mL/h.
46 mL/h.
48 mL/h.
The Correct Answer is A
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
An isotonic solution has the same concentration of solutes as the blood plasma. 0.9% sodium chloride solution is an example of an isotonic solution.
It is used to supply water and salt to the body and to prevent hypotension induced by spinal anaesthesia.
Choice A is wrong because a hypotonic solution has a lower concentration of solutes than the blood plasma.
It can cause water to move into the cells and cause them to swell.
Choice C is wrong because a hypertonic solution has a higher concentration of solutes than the blood plasma.
It can cause water to move out of the cells and cause them to shrink.
Choice D is wrong because a colloid solution contains large molecules that do not pass through the capillary walls.
It is used to increase the blood volume and pressure in cases of shock or severe blood loss.
Correct Answer is A
Explanation
Metabolic acidosis is a condition in which there is excess acid in the body fluids.
It causes rapid breathing, confusion, tiredness, headache, and increased heart rate.
Rapid breathing is a compensatory mechanism that helps to lower the carbon dioxide levels and increase the pH of the blood.
Choice B is wrong because decreased respiratory rate would worsen the acidosis by retaining more carbon dioxide and lowering the pH of the blood.
Choice C is wrong because normal respiratory rate would not be adequate to compensate for the metabolic acidosis and would result in acidemia (low blood pH).
Choice D is wrong because irregular respiratory rate is not a typical response to metabolic acidosis and could indicate other problems such as brain injury or drug overdose.
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