SAS, as you'll see in my comment, the crew know what they are picking up, just not the extent of injuries or condition of the patient.
Not all Premies in Isolettes are in critical condition, some are being transferred to a better facility or one closer to family location.
Once onboard, there is no communication between front and back with regard to the condition of the patient.
That is just how they do it at this particular outfit.
Sorry about the thread drift.