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best method to preven errors – each person check for dose accuracy 


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 The “unit dose” is the more common in hospitals where individual doe is packaged



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 Metric (gram liter meter) most common, sometime apothecary or home measurements



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 1kg=1000g
 1g=1000mg
 1mg=1000mcg
 1dL=10L
 1L=1000mL
 1mL=.001L
2.2 lb = 1 kg
 To find kgs, divide normal weight by 2.2
 F = 1.8C +32 also know this!



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Formulas for dose calculations 

Definition
 BASIC FORMULA:
 Dose desired/dose on hand = dose administered
 D/H=X
 Solutions labels mg/mL
 BASIC FORMULA for solution admin is
 D/H X Quantity = Volume Administered
 D/H X Q = V
 DIMENSIONAL ANALYSIS (DA) – a method of drug calculation where the focus is on the units of measure; e.g. order is 10 mg diazepam, dosage on Hand is 5mg/mL, how much to administer?
 Start by writing mL = b/c will administer a liquid
 Then, numerator is the same unit, so put the dosage strength with numerator as same unit
 Then multiply by desired dose with mL now as the denominator, so
 Solve for X
 Ok……..



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VERY IMPORTANT, 0.25 NOT .25 (can be mistaken for 25) 


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might be determined by weight or Body Surface Area (BSA – Appen D); BSA is given in meters squared (m^{2}) 

