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 279 lb and 6 feet 6 inches tall
If the adult dose of a drug is 100 mg,
what would be the dose in miligram for this adult according to the BSA nomogram?
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lb equals 153 mg kg
- The patient height
= 6 feet 6 inches
= ( 6 × 12 + 6 ) inch
= 78 inch
= 78 × 2.54 cm
= 198.12 cm - patient weight
= 279 lb
= 279 × 0.454 kg
= 126.7 kg -
BSA for the patient is
BSA `= \quad sqrt(( Height (cm) × Weight (Kg) )/(3600))`
` \quad \quad \quad = sqrt(( 198.12 \quad cm × 126.7 \quad Kg )/(3600)) = 2.6406 ` m2
- By nomogram to calculate BSA you will get 2.60 `m^2`
- Using the formula:
Patient dose (mg) = `(BSA\quad (m^2)) / (1.73 \quad (m^2)) × ` Adult dose (mg) - Therefore, Patient dose` =(2.6406 \quad m^2)/(1.73 \quad m^2) × 100 \quad mg = 153 \quad mg` Ans.