Elderly patients that receive help from medical flight outfits cannot be moved on public charter planes. Elderly patients call for a catheter and other equipment ; and accordingly they are not good to go by the the public flights. As they are dependent on a paramedic , or a heart monitor , air evacuation operations are mandatory. Practically all medevac specialists are fleets that are privately owned. Med flight crews frequently are contacted by families with the hospitals air ambulance list. It is general knowledge in the medical community how it is possible to have bedridden men and women who have to be transferred to a better medical facility or are not US citizens.