The statement "We'll administer 0.9% saline to restore intravascular volume" is correct. In the management of DKA, fluid resuscitation is a crucial initial step to restore intravascular volume.

The statement ”Fluid resuscitation is not necessary in DKA management” is incorrect. Fluid resuscitation is a fundamental component of DKA management, as it helps correct dehydration and electrolyte imbalances.

The statement ”We'll use insulin to correct fluid imbalances” is partially correct. Insulin is used in DKA management to lower blood glucose levels and correct the acidosis, but it does not directly correct fluid imbalances. Fluid resuscitation is a separate and essential aspect of DKA management.

The statement ”Fluid resuscitation depends on the child's age, not dehydration” is incorrect. Fluid resuscitation in DKA is based on the child's degree of dehydration and the severity of DKA, not solely on age. Children with DKA are at risk of severe dehydration regardless of their age, and fluid resuscitation is determined by clinical evaluation and laboratory findings. Age is just one of the factors considered in this assessment.