# How should i round this based on the given rounding rules?

Published

Rounding Rules:

parenteral

Intravenous infusion by gravity (gtts/min): round to a whole number

Intravenous infusion by pump (mL/hr): round to the nearest tenth

Injectable medications:

• For any volume less than 1 mL, round to the nearest hundredth
• For any volume greater than 1 mL, round to the nearest tenth

ENTERAL

Oral/NGT/PEG/J Tube:

• For any volume less than 1 mL, round to the nearest hundredth
• For any volume greater then 1mL, round to the nearest tenth

WEIGHT:

POUNDS TO KILOGRAMS CONVERSIONS: round to the nearest tenth

___________________________________________

Question:

1. The prescriber orders Nitroprusside 5 mcg/kg/min. The medication available is labeled Nitroprusside 200 mg /250 mL.

Patient weight: 205lbs

Calculate the rate on the pump.

Answer: 35.3 mL/hr (according to the answer key it says the answer is 35, but based on the rounding rules, wouldn't the answer be rounded to the tenth?)

844 Posts

I get 34.95mL/hr which would round to 35mL/hr.

Can you show your math?

347 Posts

Specializes in MICU. Has 3 years experience.

I got 34.94 which should be rounded to 35

2 Articles; 2,560 Posts

Specializes in Hospice, Palliative Care. Has 3 years experience.

Good day:

I got the same results.

Thank you.

276 Posts

It says round to the nearest tenth, so why is everyone rounding to the whole number? That is what is throwing me off.

6,931 Posts

Specializes in Acute Care, Rehab, Palliative.
It says round to the nearest tenth, so why is everyone rounding to the whole number? That is what is throwing me off.

If you are setting a pump I don't think you can set it to partial mls.

2,589 Posts

Specializes in Leadership, Psych, HomeCare, Amb. Care. Has 30 years experience.

Plus, the difference between 34.9 and 35 ml/hr is only 0.00287% , and totals 2.4 ml over the entire 24 hours.

The difference is insignificant. Remain calm and round off to the nearest whole number.

1,774 Posts

Specializes in Neonatal Nurse Practitioner. Has 8 years experience.

I've never seen a pump that will let you set it more precise than a whole number. That's why you would round to a whole number.

You aren't just arbitrarily rounding numbers. It is all based on the instrument you'll use to administer the drug.

The gtts/min rounds to a whole number because you (the nurse) cannot count 39.6 or 27.4 drops. For oral and injectable drugs, you round depending on the size syringe you'll use. 1 mL syringes are measured to the hundredth of a mL, and the bigger syringes get less precise as you go up.

2,016 Posts

Specializes in Peds/Neo CCT,Flight, ER, Hem/Onc. Has 28 years experience.
I've never seen a pump that will let you set it more precise than a whole number. That's why you would round to a whole number.

Actually, there are many pumps that allow you to do this and with infants and children it's important to have this ability.

1,774 Posts

Specializes in Neonatal Nurse Practitioner. Has 8 years experience.
Actually, there are many pumps that allow you to do this and with infants and children it's important to have this ability.

You are so right. I didn't even think about syringe pumps and the like. Thanks!

844 Posts

It says round to the nearest tenth, so why is everyone rounding to the whole number? That is what is throwing me off.

when the answer is 34.95, rounding to the nearest the to gives you 35.

34.95---> you are working with the .95 part of the answer. Since the tenths place happens to be a 9, it affects the whole number.

If it were 34.75, it would become 34.8

if it were 34.85, it would become 34.9

Since it's 34.95, it becomes 35.0 (35 since trailing zeros are not allowed). Hopefully that makes sense? :)

276 Posts

Thanks!

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