IV Drip Calculations

6.11 IV Drip Calculations
 
 

Amiodarone

SVT/VT with a Pulse OR if the patient converts out of VF or Pulseless VT using electricity:

Adult:
Mix 150 mg in 50 mL of D5W
Dosage: 150 mg over 8-10 min Using a macrodrip (10 gtt/mL): Run at 60-75 gtt/min

Pediatric:
Mix 5 mg/kg in 50 mL of D5W
Dosage: 5 mg/kg over 8-10 minutes, using a macrodrip (10gtt/mL): Run at 60-75 gtt/min.

Dopamine

Mix 400 mg in 250 mL of D5W, Concentration = 1600 mcg/mL, Dosage: 5-15 mcg/kg/min
Using a microdrip (60 gtt/mL):
15 gtt/min = 400 mcg/min
30 gtt/min = 800 mcg/min
45 gtt/min = 1200 mcg/min
60 gtt/min = 1600 mcg/min
Alternative: Mix 400 mg in 500 mL of D5W Concentration = 800 mcg/mL

Using a microdrip (60 gtt/mL):
30 gtt/min = 400 mcg/min
60 gtt/min = 800 mcg/min
90 gtt/min = 1200 mcg/min
120 gtt/min = 1600 mcg/min

Quick Calculation:
Take the patient's weight in pounds, drop the last number, and then subtract 2. This will give you the starting drip rate at 5 mcg/kg/min. For every change in micrograms, add or subtract 3 drops.

Example:
Patient weighs 175 lb; Drop last number (5) from 175 = 17, 17 - 2 = 15
5 mcg/kg/min = 15 gtt/min
6 mcg/kg/min = 15 + 3 = 18 gtt/min
(This quick calculation gives a very close approximate dose.)

Epinephrine
Mix 1 mg of 1:10,000 in 250 mL D5W Concentration = 4 mcg/mL Dosage: 2-10 mcg/min
Using a microdrip (60 gtt/mL): 15 gtt/min = 1 mcg/min
30 gtt/min = 2 mcg/min
45 gtt/min = 3 mcg/min
60 gtt/min = 4 mcg/min
75 gtt/min = 5 mcg/min
90 gtt/min = 6 mcg/min
105 gtt/min = 7 mcg/min
120 gtt/min = 8 mcg/min
135 gtt/min = 9 mcg/min
150 gtt/min = 10 mcg/min

Magnesium Sulfate
Eclamptic Seizures: Mix 4 g in 50 mL of D5W, Concentration = 80 mg/mL, Dosage: 4 g over 5-10 min, Using a macrodrip (10 gtt/min): Run at 58-116 gtt/min

Torsades de Pointes and VF: Mix 1-2 g in 50 mL of D5W, Concentration = 20-40 mg/mL, Dosage:
1-2 g over 1-2 min, Using a macrodrip (10 gtt/min): Run at 270 gtt/min

Maintenance:
Mix 1 g in 250 mL of D5W, Concentration = 4 mg/mL, Dosage: 2-4 mg/min
Using a microdrip (60 gtt/mL):
30 gtt/min = 2 mg/min
45 gtt/min = 3 mg/min
60 gtt/min = 4 mg/min