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 300 mg,
what would be the dose for a adult weighing 212 lb
and measuring 4 feet 8 inches
in height using the BSA nomogram?
Click on the button below to see the answer and explanations
Notice: Undefined variable: input_value1 in /home/jshzub/web/rxcal.org/public_html/practice/practice/includes/body.php on line 220
lb equals 338 mg kg
- The patient height
= 4 feet 8 inches
= ( 4 × 12 + 8 ) inch
= 56 inch
= 56 × 2.54 cm
= 142.24 cm - patient weight
= 212 lb
= 212 × 0.454 kg
= 96.2 kg -
BSA for the patient is
BSA `= \quad sqrt(( Height (cm) × Weight (Kg) )/(3600))`
` \quad \quad \quad = sqrt(( 142.24 \quad cm × 96.2 \quad Kg )/(3600)) = 1.9496 ` m2
- By nomogram to calculate BSA you will get 1.82 `m^2`
- Using the formula:
Patient dose (mg) = `(BSA\quad (m^2)) / (1.73 \quad (m^2)) × ` Adult dose (mg) - Therefore, Patient dose` =(1.9496 \quad m^2)/(1.73 \quad m^2) × 300 \quad mg = 338 \quad mg` Ans.