Practice Test F

Vet 246 Large Animal - Dose Calculation Practice Test Notes

Introduction

  • This practice test involves calculating medication doses for various animal weights and specified dosages.
  • Each question is aimed at reinforcing skills in converting units and calculating required dosages based on prescribed quantities.
  • Importance of rounding: Specific instructions dictate when to round, which is essential for precision in medication dosing.

Test Questions Overview

  1. Conversion from mg to mcg

    • Question: Calculate 0.673 mg in mcg. (Do not round)
    • Conversion factor: 1 mg = 1000 mcg
    • Calculation: 0.673 mg × 1000 = 673 mcg
    • Answer: 673 mcg

  2. Conversion from grams to different units

    • Question: Convert 60 g. (No rounding)
    • Conversion considerations should align with specified units in clinical context.
    • Answer: 60 g (to be confirmed based on unit needed, e.g., ounces, kg).

  3. Conversion of ounces to mL

    • Question: Convert 2.3 oz to mL. (Round to the nearest tenth mL)
    • Conversion factor: 1 oz = 29.5735 mL
    • Calculation: 2.3 oz × 29.5735 = 68.58305 mL
    • Rounded answer: 68.6 mL

  4. Captopril dosage for a dog

    • Prescription: Captopril for a 55# dog, dosage 2 mg/kg TID.
    • Dog weight in kg: 55# / 2.2 = 25 kg
    • Total dose per day = 2 mg/kg × 25 kg × 3 times = 150 mg/day
    • Tablets available: 100 mg each.
    • Tablets needed for two weeks: 150 mg/day ÷ 100 mg/tablet × 14 days = 21 tablets. Answer: 21 tablets

  5. Griseofulvin dosage

    • Dose: 500 mg PO BID for 3 weeks.
    • Conversion: 500 mg ÷ 500 mg/tablet = 1 tablet per dose
    • Total tablets: 1 tablet × 2 times/day × 21 days = 42 tablets. Answer: 42 tablets

  6. Cimetidine dosing

    • Patient: 72# dog, dosage 4 mg/kg QID.
    • Calculation: 72# / 2.2 = 32.727 kg
    • Total daily dose = 4 mg/kg × 32.727 kg × 4 = 522.9 mg
    • Concentration: 300 mg/5 mL.
    • mL needed per day: 522.9 mg / (300 mg/5 mL) = 8.715 mL
    • Rounded answer: 8.7 mL

  7. Clindamycin for a cat

    • Patient: 14# cat, dose 7 mg/kg PO BID.
    • Conversion: 14# / 2.2 = 6.36 kg
    • Total dose per administration: 7 mg/kg × 6.36 kg = 44.52 mg
    • Concentration: Clindamycin is available at 25 mg/mL.
    • mL required per dose: 44.52 mg / (25 mg/mL) = 1.78 mL
    • Rounded answer: 1.8 mL

  8. Acetylcysteine dosage for a cat

    • Patient: 12# cat, dose 150 mg/kg.
    • Conversion: 12# / 2.2 = 5.45 kg
    • Total dose: 150 mg/kg × 5.45 kg = 817.5 mg.
    • mL needed (depends on concentration provided).
    • Example: If concentration is 100 mg/mL, then 817.5 mg / (100 mg/mL) = 8.175 mL. Need concentration to provide exact answer.

  9. Formaldehyde solution preparation

    • Task: Prepare 500 mL of a 5% formaldehyde solution.
    • Calculation: A 5% solution = 5 g/100 mL.
    • Total for 500 mL: (5 g/100 mL) × 500 mL = 25 g formaldehyde.
    • Concentration clue: Must identify volume of stock solution for mixing. Need final concentration volume confirmation.

  10. Diphenhydramine dosage for a dog

    • Dog weight: 24 kg, dosage 2 mg/#.
    • Total dose: 2 mg × 24 kg = 48 mg.
    • Concentration: 50 mg/mL.
    • mL required per dose: 48 mg / (50 mg/mL) = 0.96 mL. Round answer: 1.0 mL

  11. Tobramycin dosage for a llama

    • Weight: 325#, dose 1.7 mg/kg IM TID.
    • Calculation: 325# / 2.2 = 147.73 kg
    • Total dose: 1.7 mg/kg × 147.73 kg = ~250.12 mg
    • Volume required given 80 mg/2 mL: 250.12 mg / (80 mg / 2 mL) = 6.25 mL. Rounded answer: 6.3 mL

  12. Xylazine for a rabbit

    • Weight: 6#, dose 5 mg/kg.
    • Calculation: 6# / 2.2 = 2.73 kg
    • Total dose: 5 mg/kg × 2.73 kg = 13.6 mg.
    • Concentration: 100 mg/mL
    • mL required: 13.6 mg / (100 mg/mL) = 0.136 mL. Rounded answer: 0.1 mL

  13. Butorphanol for a ferret

    • Weight: 5.4#, dose 0.1 mg/kg.
    • Calculation: 5.4# / 2.2 = 2.45 kg
    • Total dose: 0.1 mg/kg × 2.45 kg = 0.245 mg.
    • Concentration: 20 mg/10 mL
    • mL required: 0.245 mg / (20 mg/10 mL) = 0.1225 mL. Rounded answer: 0.1 mL

  14. Potassium chloride for a dog

    • Patient: 43# dog receiving IV fluids at 20 mEq/L.
    • Max dosage: 0.5 mEq/kg/hr; calculate for a dog weighing 43# (19.5 kg).
    • Dose per hour: 0.5 mEq/kg × 19.5 kg = 9.75 mEq/hr.
    • Total dose in mL: Find out mL from concentration (20 mEq/L) needed. Pending concentration details for full calculation.

  15. Oxytocin dosage for a 500# sow

    • Total dose: 40 units IM; knowing concentration is 20 USP units/mL.
    • mL needed for dosage: 40 units ÷ (20 units/mL) = 2 mL.

  16. Aspirin dosage for a dog

    • Weight: 71.5#, dose 25 mg/kg BID.
    • Calculation: 71.5# / 2.2 = 32.5 kg
    • Total dose: 25 mg/kg × 32.5 kg = 812.5 mg.
    • Assuming each tablet is 5 gr (a common metric), convert mg to gr for equivalency. Final computation pending on tablet conversion.

  17. Fluids for a dehydrated dog

    • Weight: 49#, 3% dehydration, ongoing losses of 25 mL/day.
    • Calculation: Dehydration fluid requirement = (Weight in kg × % dehydration).
    • First 24h total: Rehydrate using maintenance + losses (requires detailed input on estimation).

  18. Infusion pump calculation

    • Rate: 1.25 mL/min; total needed: 600 mL.
    • Calculation: 600 mL ÷ 1.25 mL/min = 480 min
    • Conversion to hours: 480 min ÷ 60 = 8 hours. Answer: 8 hours

  19. Gtt/sec calculation

    • Patient needing 400 mL over 5 hours, using a 15 gtt/mL drip set.
    • Total drops: 400 mL × 15 = 6000 gtt over 300 min.
    • Calculate gtt/sec: 6000 gtt ÷ 18000 sec = 0.33 gtt/sec. Rounded answer: 33.0 gtt

  20. Triamcinolone dosage for a dog

    • Weight: 8.3#, dose 0.2 mg/kg PO SID for 10 days.
    • Total dose calculation and tablet conversion similar to previous, indicated dosage per tablet will help in final computation.