The Parkland formula is V = 4mA where V = volume of replacement fluid (mL) required within the first 24 hours after a burn injury, m = body mass, kg A = percent of body surface area covered with burns. The first half of the fluid should be delivered in the first 8 hours.
Because we are concerned with fluid replacement within the first 8 hours, the Parkland formula is valid to be used.
Given: m = 75 kg A = 40%
Therefore V = 4*75*40 = 12,000 mL = 12 L This is the fluid replacement required in the first 24 hours.
Because half of this amount should be delivered in the first 8 hours, the amount of fluid replacement is 6,000 mL in 8 hours, or 6000/8 = 750 mL per hour.
