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?
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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.