Final answer:
The most reliable indicator of adequacy of fluid resuscitation in burn patients is urine output of 1ml/kg/hr.
Step-by-step explanation:
The most reliable indicator of adequacy of fluid resuscitation in a patient with superficial partial-thickness burn injuries would be urine output of 1ml/kg/hr. In burn patients, the loss of fluids through the damaged skin can lead to dehydration and electrolyte imbalance. Monitoring urine output is important to ensure that the patient is adequately hydrated. An output of at least 1ml/kg/hr indicates that the kidneys are functioning properly and that fluid resuscitation is effective.