Sometimes there are bedridden cases that seek the help of air evacuation charters on account of the fact that they are not US citizens and/or have a medical necessity of being transferred. Furthermore , air evacuation businesses are frequently utilized because of the fact that these men or women have need of a flight paramedic , and special medical care. Patients have need of critical care units ; and they are not good to be brought on the normal air travel services. There usually are non emergency air ambulance crews who are there to transfer patients anywhere in the globe. Medflight specialists occasionally can be contacted by patients with a hospital volunteer.