MATH Flashcards
When do you round to the nearest 10th?
Pt dose
(Mcg/kg/min)
(Mg/kg/min)
When do you round to the whole number?
Pt Kg
mL
When do you draw a trough level
30 min before giving drug
What lab for heparin
PTT
(Warfarin/coumadin: pt/inr)
Synergistic vs Antagonistic effect
S:
Enhancing another
A:
Oppose another
What should you do with IV gtts with the same effect?
Titrate singularly (one at a time)
Concentrated gtts require what?
Why might we give a double concentrated drip
Need smaller increments of change when increasing/decreasing
May use a double concentration for patient on fluid restrictions
Titrate by what
Titrate by DOSE
NOT mL (mL is for I/O)
A. Infusion Rate formula (based on wt)
What does the equation look like?
What information will we be given?
mL/hr = mcg/kg/min X kg X 60
——————————
Mcg/mL
Dose: 5mcg/kg/min
Concentration: 400mg in 250ml
Patient wt: 187lbs
Ex. Calculate the infusion rate
Dose: 5mg/kg/min
Concentration: 400mg in 250ml (400,000/250=1600)
Wt: 187lbs (85kg)
5 X 85 X 60
————— = 15.94 (16ml/hr)
1600
B. Infusion rate formula (not based on wt)
Equation?
What information do you need?
Mg/min X 60 Mcg/min X 60
—————— Or ———————
Mg/ml Mcg/mL
Dose: 35mcg/min
Concentration: 50mg in 250ml (50,000mcg/250)
B. Infusion rate formula (not based on wt example)
Dose: 2mg/min
Concentration: 2gm/250ml
2 X 60
———
8 (2,000/250)
=15
C. Formula for dosage patient receiving
Equation
What information do you need?
What do we do when we get the dose?
ml/hr X mcg/ml Mcg/kg/min = —————————
Kg X 60
Infusion rate: 19 ml/hr
Concentation: 400mg in 250 ml
Weight: 123lbs (56kg) 3360
Always round to nearest 10th with dose
C. Formula for dosage patient receiving
Ex.
Concentration: 400mg/250ml (400,000/250 =1600)
Infusion rate: 19ml/hr
Weight: 123lbs (56kg)
19 X 1600 (40,300)
—————
56 X 60 (3360)
=9.04mcg/kg/min (but round to 10th) but dont do 9.0
So its just 9!
D. Concentration formula:
Equation:
What information do you need?
ml/hr X mcg/mL
Mcg/min = ————————
60
Infusion rate: 14ml/hr
Concentration: 2gm in 250ml (2,000/250=8)
