### Patient dose based on BSA from nomogram

6. Patient-based Dose 6.3) Body Surface Area 6.3.1) Body Surface Area

6.3.1.3) Dose via BSA nomogram Normal 1

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A adult weighing 150 lb and 4 feet 6 inches tall If the adult dose of a drug is 10 mg, what would be the dose in miligram for this adult according to the BSA nomogram? Click on the button below to see the answer and explanations

lb equals 9 mg kg

• The patient height
= 4 feet 6 inches
= ( 4 × 12 + 6 ) inch
= 54 inch
= 54 × 2.54 cm
= 137.16 cm

• patient weight
= 150 lb
= 150 × 0.454 kg
= 68.1 kg

• BSA for the patient is

BSA = \quad sqrt(( Height (cm) × Weight (Kg) )/(3600))

 \quad \quad \quad = sqrt(( 137.16 \quad cm × 68.1 \quad Kg )/(3600)) = 1.6108  m2

• By nomogram to calculate BSA you will get 1.53 m^2
• Using the formula:
Patient dose (mg) = (BSA\quad (m^2)) / (1.73 \quad (m^2)) ×  Adult dose (mg)
• Therefore, Patient dose =(1.6108 \quad m^2)/(1.73 \quad m^2) × 10 \quad mg = 9 \quad mg Ans.