SBB Lab Math 2024 QUESTIONS AND SOLUTIONS

SBB Lab Math QUESTIONS AND SOLUTIONS How many centimeters are in an inch? - Answer -2.54 How many pounds are in a kilogram? - Answer -2.2 What is conversion for an X% solution? - Answer -X Grams of solute/ 100 mL of solvent What is the quadratic formula? - Answer -x=(-b±√(b^2-4ac))/2a Molarity equation - Answer -Moles of solute/liters of solution = M convert grams to moles - Answer -grams/molar mass dilution equation - Answer -C1V1=C2V2 Average adult Male total blood volume? - Answer -66mL/kg Average adult Female total blood volume? - Answer -60mL/kg Total Blood Volume Equation - Answer -Total blood volume (mL) = weight (kg) x blood volume (mL/kg) Plasma Volume Equation - Answer -Plasma Volume (mL) = total blood volume (mL) x (1 - hct) Hardy-Weinberg Equation - Answer -p^2 + 2pq + q^2 = 1, where p is the dominant allele frequency & q is the recessive allele frequency. Of note, p + q = 1 HardyWeinberg Equation for 3 alleles - Answer -p^2 + 2pq + q^2 + 2qr + r^2 + 2pr = 1 AND p + q + r = 1 How to calculate percentage of random units compatible for a patient with multiple antibodies. - Answer -Multiply the negative frequencies in the white population for each antigen. How many units to test to find antigen negative units? - Answer -X units to screen = # of units needed/ probability of finding negative units Note: then round up