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Common Medication Formulas
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Injections:
Amount to be drawn up
into a syringe
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(Desired amount of drug x total volume)
_________________________________
Total amount of drug on hand
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Volume/hour (mL/hr;
e.g., 150 mL/hr)
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(Volume x drip
set factor)
_____________________
Time in minutes
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mg/min
(e.g., 4 mg/min)
mg/hr
(i.e., 20 mg/hr)
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(Desired amount X volume
X drip set factor)
______________________
Amount of drug on hand
_______________________
Total infusion time in minutes
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To figure the rate of
an existing IV
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1. Count drops/minute and multiply by 60.
2. Divide result by the drip factor being used.
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IV Fluid Drip Rate Table (drops/minute)
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Rate
(mL/hr) →
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TKO
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50
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75
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100
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125
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150
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175
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200
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250
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10 gtt/mL set
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5
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8
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13
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17
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21
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25
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29
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33
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42
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12 gtt/mL set
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6
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10
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15
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20
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25
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30
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35
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40
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50
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15 gtt/mL set
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8
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13
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19
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25
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31
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37
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44
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50
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62
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20 gtt/mL set
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10
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17
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25
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33
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42
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50
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58
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67
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83
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60 gtt/mL set
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30
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50
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75
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100
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125
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150
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175
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200
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250
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Note: TKO is 30 mL/hr
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