Published
Here's how I would set up the problem:
1400 units x 250 mls
1 hour ........25000 units
You then cross multiply (crossing out "units" to leave you with mls/hr). Your answer should be 14mls/hr.
Here are a couple of good site that explain this problem using dimensional analysis.
http://www-isu.indstate.edu/mary/tutorial.htm
http://www.alysion.org/dimensional/analysis.htm
It will get easier as you continue to do these type of problems....
Good luck!
First you need to figure out how many units are in each ML of the mixed solution: 25000 units divided by 250 mL = 100 units/mL
Now you need to find out how many mL/hour you need to set the pump at to acheive the ordered units per hour. solution: 1400 units divided by 100 (because their are 100 units per mL)= 14 ml/Hour
Swtooth
a doctors order reads "heparin iv at 1400 units/hr" for a patient undergoing percutaneous coronary intervention. the pharmacy sends heparin in a bag containing 25,000 units in 250ml of d5w. what infusion rate should you set on this iv pump?
iv pumps are almost always set at mls per hour, so those are the labels you are looking for in the final answer. do, this problem by dimensional analysis (factor label method)"
adamsmom
220 Posts
I can not figure out how to answer this:
A doctors order reads "heparin IV at 1400 units/hr" for a patient undergoing percutaneous coronary intervention. The pharmacy sends heparin in a bag containing 25,000 units in 250ml of D5W. What infusion rate should you set on this IV pump?