For this patient, we need to determine the total body surface area (TBSA) burned before we can calculate the total fluid requirement. According to the rule of nines, the anterior right arm is 4.5% of the body surface area, the posterior left leg is 18%, and the anterior head and neck is 4.5%.
Therefore, the total TBSA burned is 4.5% + 18% + 4.5% = 27%.
Using the Parkland Burn Formula, we can calculate the total fluid requirement:
Total fluid requirement = 4 mL x 78 kg x 27% = 8424 mL
This is the total amount of fluid needed over the first 24 hours after the burn injury. Half of this amount (4212 mL) should be given in the first 8 hours, and the remaining half should be given in the next 16 hours.