I'm having difficulties completing this problem.
Ordered: Retrovir 200 mg/kg/Day IV q4 hr in 60 mL LR over 90 mins.
On Hand: Retrovir 3 g vials. Each gram is reconstituted with 4 mL of diluent
patient weighs 182 lb. Use macrotubing 20 gtt/mL
Dilute the reconstituted Retrovir in 48 mL of LR
calculate flow rate:
I know the formula is:
I'm having troubles differentiating what is "filler" and what is not.
So far I have:
- Convert lbs to Kg
182 lbs (1 kg/2.2 lbs) = 182/ 2.2= 82.73 kg
- Find ordered dose in mg/day
(200mg/kg/day) X 82.73 kg = 16,545.45 mg/day
- Find ordered dose in mg/dose
Q4hrs therefore give 6 doses in one day
(16,545.45 mg/day) X (6 doses/1 day) = 99272. 73 mg/dose
- Find concentration of medication on hand:
3 g is 3000 mg
Each gram is reconstituted in 4 mL
3000 mg/12 mL = 250 mg/mL
From here I'm completely lost, am I even in the right directions? What further steps do I need to take to solve or understand this problem?
May 10, '13
by Esme12, ASN, BSN, RN Senior Moderator
nice job on a long problem.....
however....you ordered dose daily:
This patient weighs 82.73kg x 200mg/kg/day= 16546mg/day.
Order is for q4h: that's 6 doses. 16546mg/6 doses= 2757mg per dose...so recalculate
Last edit by Esme12 on May 10, '13