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
Total tried: Correct: Wrong:
If the adult dose of a drug is 90 mg,
what would be the dose for a adult weighing 263 lb
and measuring 4 feet 11 inches
in height using the BSA nomogram?
Click on the button below to see the answer and explanations
lb equals 116 mg kg
- The patient height
= 4 feet 11 inches
= ( 4 × 12 + 11 ) inch
= 59 inch
= 59 × 2.54 cm
= 149.86 cm - patient weight
= 263 lb
= 263 × 0.454 kg
= 119.4 kg -
BSA for the patient is
BSA `= \quad sqrt(( Height (cm) × Weight (Kg) )/(3600))`
` \quad \quad \quad = sqrt(( 149.86 \quad cm × 119.4 \quad Kg )/(3600)) = 2.2294 ` m2
- By nomogram to calculate BSA you will get 2.07 `m^2`
- Using the formula:
Patient dose (mg) = `(BSA\quad (m^2)) / (1.73 \quad (m^2)) × ` Adult dose (mg) - Therefore, Patient dose` =(2.2294 \quad m^2)/(1.73 \quad m^2) × 90 \quad mg = 116 \quad mg` Ans.