Basic dosage calculation setups: desired-over-have, weight-based dosing, and IV drip rate formulas explained step by step.
About this set
33 basic cards for NCLEX-RN Nursing. Set 1 of 2 in Nursing Dosage Calculations. It opens with "In the D/H x Q dosage formula, what does D stand for?" and "In the D/H x Q dosage formula, what does H stand for?". Study it alongside the other NCLEX-RN sets below.
33 cards · basic cards · AI-written, checked twice. Edit anything.
- In the D/H x Q dosage formula, what does D stand for?
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Desired dose (the dose ordered by the provider)
- In the D/H x Q dosage formula, what does H stand for?
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Dose on hand (the strength or concentration available)
- In the D/H x Q dosage formula, what does Q stand for?
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Quantity, the volume or form the dose on hand comes in
- The basic dosage calculation formula is ____.
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D/H x Q
- Order: 500 mg. On hand: 250 mg tablets. How many tablets are given?
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2 tablets
- Order: 750 mg. On hand: 250 mg per 5 mL. How many mL are given?
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15 mL
- Why must D and H be in the same unit of measurement before calculating a dose?
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Mismatched units produce an incorrect dose because the formula assumes both values share one unit
- What is weight-based dosing?
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Calculating a medication dose using the patient's body weight, usually expressed as mg/kg
- One kilogram equals how many pounds?
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2.2 pounds
- A patient weighs 154 lb. What is the weight in kilograms?
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70 kg
- Order: 5 mg/kg/day. Patient weighs 60 kg. What is the total daily dose?
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300 mg
- A total daily dose of 300 mg is split into 3 equal doses. What is each dose?
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100 mg
- What formula converts a total daily weight-based dose into a single dose amount?
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Total daily dose divided by the number of doses per day
- In IV drip calculations, the drop factor is measured in ____.
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drops per milliliter (gtt/mL)
- What is the typical drop factor range for a macrodrip IV tubing set?
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10 to 20 gtt/mL