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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 |
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- 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 (m2) |
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