Can some please help me with these problems, I tried working them out for 2hours, I just can't figure what I doing wrong? I 've converted the lbs to kg but I'm having a hard time pick out what information is important to in this problem

1. Order for 250 ml D5W with 225 mg Nitropress to infuse at 3 mcg/kg/min. Patient weighs 110 lbs. How fast will you set your infusion controller ? ____________________mL/hr

1. Order is for Potassium phosphate 10 meq IV in 100 ml NS over 90 minutes. What rate would you set your infusion controller ? ______________________________

For the 1st one....I did it like this (not sure if it's right)

Patient weighs 50kg, so 3x50=150mg=0.15mcg

225mg=0.15mg=37.5 =0.16mlx60(60mins in an hour)=10ml/hr

250ml ....xml ....225mg

For the 2nd...now sure what the question is? Does it want the amount given/hour?

I am confused by the title Heparin and units??

In the second one they just want you to determine how many mL will infuse over 60 mins. So what's relevant is the 100mL and the 90 mins. Ratio-proportion setup seems the most intuitive in this case.

100mL/90mins = XmL/60mins

...then you would state your answers in mL/h because that is the standard.

That is the right answer by my answer sheet, but could you explain it how you got the answer I don't understand 3mcgxkgxmin= 50g=kg x 3 = 150mcg which is converted to mg 0.15, now I use formula D x v I plugged in 0.15 mg x250ml

H 225mg =0.16

Now how did you get the 10/ml/hr did

weight based infusions over time can either be ordered hourly or per minute. regardless of which way, the formulae are very similar.

to solve for an infusion ordered per hour: (dose × weight) ÷ concentration = ml/hr.

to solve for an infusion ordered per minute: (dose × weight × 60) ÷ concentration = ml/hr.

when you set up this type problem it is important that you use the same units of measure throughout. for clarity, i always convert units to what are used in the order, and what i need to solve for.

1.order for 250 ml d5w with 225 mg nitropress to infuse at 3 mcg/kg/min. patient weighs 110 lbs. how fast will you set your infusion controller? 9 ml/hr

dose: 3 mcg

weight: 50 kg

conc: 900 mcg/ml

placing these values in the equation:

(3 × 50 × 60) ÷ 900 = x ml/hr

9000 ÷ 900 = 9 ml/hr

intermittent iv infusions over time can either be ordered hourly or per minute. regardless of which way, the formulae are very similar.

to solve for an infusion ordered per hour: volume ÷ time ordered = ml/hr.

to solve for an infusion ordered per minute: (volume × 60) ÷ time ordered = ml/hr.

1. order is for potassium phosphate 10 meq iv in 100 ml ns over 90 minutes. what rate would you set your infusion controller? 66.6 (67) ml/hr

volume: 100

time: 90 minutes

placing these values in the equation:

(100 × 60) ÷ 90 = x ml/hr

6000 ÷ 90 = 66.6 (67) ml/hr

all infusion devices that i am familiar with allow you to set the infusion rate to one decimal place.