Nursing Students Student Assist
Published Aug 16, 2007
Laura77598
80 Posts
Hi all,
I am trying to work on some dosage calculation problems to prepare for my Dosage Calculations class this fall. I have been doing pretty good, but I can't sem to figure out this problem. Could someone please help me set this problem up w/ D.A?
Thanks for all your help!
Laura
10.Your client was supposed to get 1 L of D5LR over 8 hours, starting at 1700. When you checked the bag at 1800, 300 mL had infused. To what rate will you adjust the pump in order to finish on time?
RANCH GIRL
146 Posts
Since you have 700 mL remaining to be infused and 7 hours' time to finish the infusion, work the problem like this:
700 mL/7 = 100 mL/hour to complete this on time.
Daytonite, BSN, RN
1 Article; 14,604 Posts
your client was supposed to get 1 l of d5lr over 8 hours, starting at 1700. when you checked the bag at 1800, 300 ml had infused. to what rate will you adjust the pump in order to finish on time?
when setting up da (dimensional analysis, or factor label) problems you still need to know your basic formula of "dose desired divided by dose on hand" because this is how your equation of fractions (ratios) comes about that you will perform the math on. your original dose desired was 1 liter to be given over 8 hours. however, within one hour 300 ml had been infused from the bag. that is going to require subtraction as well when you set up the problem.
this, by the way, is a practical problem that does happen in actual nursing practice. so, to do this problem you are going to need to understand how to work mathematics with fractions and the order of operations that you perform when you are working with strings of terms to multiply and subtract (in this particular case). you are looking to end up with an answer that has a fraction (or ratio) with the labels of ml/hour on the numerator and denominator, respectively.