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Registered Nurse (RN)
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NCLEX®
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NCLEX-RN® Test Plan: Client Needs
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Dosage Calculation

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NCLEX-RN® Test Plan: Client Needs | Registered Nurse (RN) School Study Aid

Dosage Calculation
8 Picmonics to Learn | 17 mins
Standard Formula
Memorize the Formula
Dose Ordered
Dose on Hand
Amount on Hand (Quantity)
Before Calculating the Dose
Ensure Same Units and System of Measurement
Calculating the Dose
Dose Ordered/Dose on Hand X Amount on Hand = Amount to Administer
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2 mins
IV Calculation Formulas
IV TUBING
Drop Factor
Macrodrip
Microdrip
FLOW RATES
Total Volume to Infuse (mL) X Drop Factor/ Time in Minutes = Drops/Minute (gtt/min)
INFUSION TIME
Total Volume to Infuse / mL per Hour Being Infused = Infusion Time
Number of mL/Hr
Total Volume in mL / Time in Hours = Number of mL per Hour
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3 mins
Infusions Prescribed by Unit Dosage per Hour
Step 1
Determine Amount of Medication per 1mL
Known Amount of Medication in Solution/Total Volume of Diluent = Amount of Medication per Milliliter
Step 2
Calculate mL per Hour
Dose per Hour Desired/Concentration per Milliliter = Infusion Rate (mL/hour)
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2 mins
Metric System
Weight
Kilogram (kg)
Gram (g/gm)
Milligram (mg)
Microgram (mcg)
Volume
Liter (L)
Milliliter (mL)
Length
Meter (m)
Converting
Larger to Smaller: Multiply
Smaller to Larger: Divide
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3 mins
Ratio and Proportion
Ratio
Two Numbers Separated by a Colon
Colon Indicates Division
Proportion
Equation with Two Equal Ratios
Double Colons Indicates Equal Sign
Extremes
Means
Calculating the Dose
Set up the Proportion
Cross-Multiply Means and Extremes
Divide Both Sides by the Number Before Unknown Variable
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3 mins
Conversions: Weight
1000 mcg = 1 mg
1000 mg = 1 g
1000 g = 1 kg
2.2 lb = 1 kg
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1 min
Conversions: Volume
Volume
1 mL = 1 cc
5 mL = 1 Tsp
15 mL = 1 Tbsp
30 mL = 1 oz
1000 mL = 1L
2 Tbsp = 1 oz
8 oz = 1 Cup
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2 mins
Conversions: Temperature
0° C = 32° F
How to Convert Celsius to Fahrenheit
°C x 1.8 + 32 = °F
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1 min

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