The height of a child is 80cm and the weight is 15kg. The usual adult dose of Amitriptyline is 75mg/day. What would be the dose for the child based on body surface area (BSA)
To calculate the dose of Amitriptyline for the child based on body surface area (BSA), we can use the following formula:
BSA (m²) = (√(Height (cm) x Weight (kg)) ÷ 3600
First, let's calculate the body surface area (BSA) of the child:
BSA = (√(80 cm x 15 kg)) ÷ 3600
= (√(1200)) ÷ 3600
= (√(1200)) ÷ (60 x 60)
= (√(1200)) ÷ (3600)
≈ 0.0585 m²
Now, we can determine the dose for the child based on the usual adult dose per square meter (mg/m²).
Child's dose = BSA x Adult dose
= 0.0585 m² x 75 mg/day
≈ 4.3875 mg/day
Therefore, the estimated dose of Amitriptyline for the child based on body surface area (BSA) would be approximately 4.3875 mg/day.