Nursing Students General Students
Published Aug 12, 2006
The school I'm going to doesn't allow its students to use calculators for dosage calculations. This scares me.
are dosage calculations possible, and comprehensible without calculators?
DarlinNurseRed
82 Posts
When I was in school, we couldn't use calculators for testing until 3rd semester, and only if you passed the dosage criticals. It was only to make sure we understood medical math concepts. In clinicals we would do both and of course it was always checked by instructor @ med checks. I feel comfortable with the math either way. (but of course, it made us all anxious on testing days when we had to show our work!)
cardiacRN2006, ADN, RN
4,106 Posts
Don't student nurses have enough to worry about:: ....even docs and nurses use calculators where I work. I always check my calculations on calculator twice just to make sure of no errors.they are not all as easy as one thread's example but very doable w/calculatorsome examples:Order: Atropine 0.3 mg IM nowLabel: Atropine 400 mcg/mLHow many mL would be administered?
they are not all as easy as one thread's example but very doable w/calculator
some examples:
Order: Atropine 0.3 mg IM now
Label: Atropine 400 mcg/mL
How many mL would be administered?
LOL, the first thing I would say is I don't give less than 0.5mg of Atropine.
But seriously, you don't want to get dependent on the calculator. When the time comes where you have to do math on the fly, you don't want to run out of the room to get the calculator, KWIM? For instance, I had to do conscious sedation the other day. Dr says, give 25 of Fentanyl. I have 100mcg/2mL. That is NOT the time to tell him to please hold on while I run out and get my calculator. Get used to doing it the long way and then double check your work with a calculator if you need it.
catlady, BSN, RN
678 Posts
Don't student nurses have enough to worry about:: ....even docs and nurses use calculators where I work. I always check my calculations on calculator twice just to make sure of no errors.they are not all as easy as one thread's example but very doable w/calculatorsome examples: Order: Atropine 0.3 mg IM now Label: Atropine 400 mcg/mL How many mL would be administered?Order: Theo-Dur 0.45 g Label: Theo-Dur 300 mgHow many tablets should be given?Order: Nitroglycerine gr. 1/150 SL for chest pain Label reads: Nitroglycerine 0.4 mg tabsHow many tabs would you give?Order reads: Morphine sulfate gr. 1/8 Label reads: Morphine sulfate 10 mg per mL. How many mL will you give? Order: 2000 mL Ringer's Lactate (RL) to run for 16 hours. Drop factor 10 gtt/mLFlow rate _____ gtt/min _____ mL/hr
Order: Theo-Dur 0.45 g
Label: Theo-Dur 300 mg
How many tablets should be given?
Order: Nitroglycerine gr. 1/150 SL for chest pain
Label reads: Nitroglycerine 0.4 mg tabs
How many tabs would you give?
Order reads: Morphine sulfate gr. 1/8
Label reads: Morphine sulfate 10 mg per mL.
How many mL will you give?
Order: 2000 mL Ringer's Lactate (RL) to run for 16 hours.
Drop factor 10 gtt/mL
Flow rate _____ gtt/min _____ mL/hr
These are all pretty easy (did them in my head just now), but c'mon, they need to get in the real world. In over 20 years, I've never seen anyone order morphine by grains. In fact, the only medication I've ever seen ordered in grains is acetaminophen, and that was by one particular neurosurgeon who always wanted 20 grains for his patients.
I think nurses need to know math. Calculators are a nice shortcut. But when my student couldn't figure how to give a 5mg dose when the med came 10 mg in 2 cc, she didn't deserve the break of a calculator.
And yes, we used slide rules when I was taking science...calculators, when they could be found, cost about $100 for a basic four-function and were never allowed for exams.
81ke83
81 Posts
Our school provides calculators for the tests. You have to be careful as the calculators are not reliable and we check the answers by hand. We cannot use our graphing calculators because they have the ability to program answers. When we take tests all our backpacks and personal stuff is piled in the front of the class. We are allowed a pencil and the nifty calculator they provide.
emllpn2006
198 Posts
At my school we were not allowed to use calculators on any dosage calculations. We were taught a formula to use with all questions and had to work it out and show all work. There was at least 10 dosage questions on each pharm test. We were told when everyone in the class got all dosage questions correct we would stop getting them. Needless to say right up till the pharm final we always had dosage questions.
wanna-be-nurse
67 Posts
I am soooo happy my school requires us NOT to use a calculator. I felt so scared to do dosage calculations not because because of the math, which then prompted me to use a calculator to make it easier. But once I tackled my fears, I feel much more secure about it. Without the calculator, it forces you to understand fully the math problem and perhaps you can apply it to other problems when they come. Calculators just basically teaches you to put in the numbers where they belong and calculate, not fully understand the problem. My advise, face your fears about math, study it until you are desensitized about math and not feel scared about it. Calculators increases errors plus, wouldn't you want to be a nurse who can handle her own? I'm sure you do. Hope I helped.
morte, LPN, LVN
7,015 Posts
hmmm had a physics instructor who allowed calculators, but reminded us that we needed a "ball park" idea what the answer should be, because of the poss of entry error....out first lab assignment my partner entered the #'s into his calc...and came up with a wrong answer......told him so and he said but i used the calc.... told him i didnt care , it was wrong...redid....low and behold, i was correct......learn, do it so many times it is automatic
good luck
Mabel 29
43 Posts
In my program, we were not allowed to use calculators in 101, but after we proved that we were competent, we were allowed to use them throughout the rest of the program. Algebra was a prereq for the program, though. The math required for dosage calculations should be able to be done without a calculator. If we can't do that, how will we be able to handle the other aspects of being a nurse? We may not always have access to a calculator, and the meds will have to be safely given regardless.
LilyNHRN
50 Posts
The school I attend, I am entering my senior year, does not let us use calculators. The math is doable without one, if you have good basic math skills.
ortess1971
528 Posts
leggendario
36 Posts
It is a good way of developing skills in computation the dosages manually. It helps you to be more sharper and more accurate. It lessens your dependence on the use of calculators especially during critical moments when there is no time or there is no available eletronic gadgets around. For my own experience this is a very important skills to gain in able for us nurses to provide the safest care to our patients.
IMHO
LDRNMOMMY, BSN, RN
327 Posts
I wouldn't be a nurse today if my school had that rule! That seems very harsh.