Math Formulas

Question 1

What is the formula to determine replacement fluid volume?

Answer 1

% dehydration x body weight (kg) x 10

Question 2

What is the formula for getting a rough estimate of a sheep or goat’s weight with pre-measured weight tape?

Answer 2

(Heart girth^2) x length / 300

Question 3

How can an E tank volume in liters be estimated?

Answer 3

By multiplying the psi by 0.3

Question 4

How many milliliters are in a teaspoon?

Answer 4

5 mL

Question 5

You give your veterinarian a machine-evaluated CBC showing a HCT of 24.99%. In most species, changes in hemoglobin are proportional to changes in HCt/PCV. What do you suspect the hemoglobin concentration is approximated at?

Answer 5

8.33
PCV/HCT is usually about 3x that of hemoglobin concentration

Question 6

How do you estimate a patient’s tidal volume to determine reservoir bag size?

Answer 6

20 mL/kg of lean body weight or 10 to 15 mL/kg of actual body weight
A reservoir bag should hold 3-5 tidal volumes, though not always necessary or practical

Question 7

How does 1 kg of weight gain equate to fluid replaced?

Answer 7

1 kg = 1L fluid replaced

Question 8

What is the minimum amount of water a horse should drink per day?

Answer 8

1 gallon per 100 pounds body weight per day

Question 9

How many milliliters are in 1 tablespoon?

Answer 9

15 mLH

Question 10

How many mg/kg is 1 part per million?

Answer 10

1 mg/kg