Dosage Calculation Flashcards
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Questions and Answers

What does kilo (k) equal?

1,000

What does centi (c) equal?

0.01

What does milli (m) equal?

0.001

What does micro (mc) equal?

<p>0.000001</p> Signup and view all the answers

What does hecto (h) equal?

<p>100</p> Signup and view all the answers

What does deka (da) equal?

<p>10</p> Signup and view all the answers

What does deci (d) equal?

<p>0.1</p> Signup and view all the answers

1 tablespoon (Tbsp) = ? mL

<p>15 mL</p> Signup and view all the answers

1 teaspoon (tsp) = ? mL

<p>5 mL</p> Signup and view all the answers

1 ounce (oz) = ? mL

<p>30 mL</p> Signup and view all the answers

1 glass or 1 cup = ? mL

<p>180 mL or 240 mL</p> Signup and view all the answers

1 kilogram (kg) = ? pounds (lb)

<p>2.2 pounds</p> Signup and view all the answers

1 inch = ? cm

<p>2.54 cm</p> Signup and view all the answers

What must the nurse do if the amount of drug ordered by a physician is not within the recommended dosage range?

<p>Contact the physician to clarify the dose.</p> Signup and view all the answers

Which of the following are correct about recommended doses in drug references? Select all that apply.

<p>Recommended doses can be written as a weight-based dose.</p> Signup and view all the answers

The nurse must convert everything into milliliters (mL) when calculating intake.

<p>True</p> Signup and view all the answers

What is classified as output?

<p>Urine, emesis, gastric drainage, wound drainage, chest tube drainage, diarrhea, colostomy or ileostomy drainage.</p> Signup and view all the answers

How do you calculate actual urine output?

<p>Subtract the amount of irrigant instilled from the total output collected.</p> Signup and view all the answers

Study Notes

Metric Prefixes

  • Kilo (k) represents 1,000.
  • Centi (c) represents 0.01.
  • Milli (m) represents 0.001.
  • Micro (mc) represents 0.000001 (5 zeros between decimal and 1).
  • Hecto (h) represents 100.
  • Deka (da) represents 10.
  • Deci (d) represents 0.1.

Standard Rules for Writing Metric Numbers

  • Use Arabic numbers with metric symbols (e.g., 1 mg, not I mg).
  • Always include a space between numbers and metric symbols (e.g., 1 g).
  • Place the Arabic number before the metric symbol (e.g., 1 g).
  • Use decimal fractions instead of fractional units (e.g., 0.5 mg).
  • Always include a leading zero before a decimal (e.g., 0.5 mL).
  • Omit trailing zeros (e.g., 1 mL, not 1.0 mL).
  • Use singular form for symbols (e.g., 15 mL, not 15 mLs).
  • For large numbers use properly spaced commas (e.g., 5,000 units).

Household Measurements

  • 1 tablespoon (Tbsp) equals 15 mL.
  • 1 teaspoon (tsp) equals 5 mL.
  • 1 ounce (oz) equals 30 mL.
  • 1 drop (gtt) has no fixed equivalent and varies by pharmacy.
  • 1 glass or 1 cup equals either 180 mL (6 oz) or 240 mL (8 oz).
  • 1 kilogram (kg) equals 2.2 pounds (lb).
  • 1 inch equals 2.54 cm.

Intake and Output Calculations

  • For ice chips, divide the original volume in half for calculating intake.
  • Intake includes any liquid food like water, ice cream, and coffee, converted into milliliters (mL).
  • Continuous feeding intake: multiply hourly rate (mL/hr) by the number of hours infused.
  • Intermittent feeding intake: sum the total amounts given during shifts.
  • Output includes urine, emesis, gastric drainage, wound drainage, and diarrhea.
  • Urinary catheters and wound drains are measured at the end of shifts.

Dosing Terminology

  • Single Dose: medication administered at one time.
  • Total Daily Dose: amount of medication given in 24 hours.
  • Divided Dose: medication given in fractional portions at intervals.
  • Initial Dose: first dose given to a patient.
  • Loading Dose: initial large dose to quickly reach therapeutic levels.
  • Maintenance Dose: dose required to sustain therapeutic effect.
  • Dosage Range: the minimum and maximum safe and effective dose.

Safe Medication Practices

  • Confirm unclear doses out of recommended ranges with the physician.
  • Recommended doses can be single doses, dosage ranges, weight-based, or based on body surface area.
  • Weight-based dosing adjusts medication according to the individual's weight (e.g., 1 mg/kg).
  • If prescribed doses exceed the recommended range, clarification is necessary.

Weight-Based Dosing Examples

  • For a patient weighing 50 kg, the dose of Medication A is calculated to be safe at 125 mcg/day while the order is for 150 mcg/day.
  • For a patient weighing 110 lb, the order of 4.5 mcg of Medication B is safe when the calculated weight-based dose is 5 mcg bid.
  • Dosages for various medications are adjusted based on both patient weight and specific drug guidelines.

The notes capture essential information about measurement conversions, dosing principles, and safe practices in medication administration critical for pharmacology and nursing studies.

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Description

This quiz includes essential flashcards for understanding dosage calculations. Each card defines a metric prefix and its corresponding value, aiding in mastering conversion techniques crucial for healthcare professionals. Ideal for nursing and pharmacy students.

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