Final answer:
After neonatal cardiac surgery, the estimated parenteral caloric requirements are generally 90-100 kcal/kg/day, which supports the infant's recovery and growth.
Step-by-step explanation:
Immediately following neonatal cardiac surgery, the best estimate of parenteral caloric requirements falls in the range of 90-100 kcal/kg/day. This provides infants with the necessary energy for recovery without overwhelming their metabolic systems. In neonatal care, precise nutritional support is crucial for healing and growth after surgical procedures. While this range is a general guideline, the exact needs may vary based on individual circumstances such as the infant's condition, weight, and surgery specifics. Adequate caloric intake is part of the holistic care required during the postoperative period.