There sometimes are injured people who need a basic life support flight paramedic , and/or a foley catheter and other equipment, so they obtain the service of fixed wing air ambulance operations. Likewise , medflight crews generally are needed due to the reality that these cases necessitate a flight doctor , and/or a catheter or similar equipment. The cases are dependent on expert medical attention , or a flight doctor and a well trained emergency medical technician — and they are unable to be transported on commercial airlines. Due to the fact that cases are noncitizens or have a medical necessity of being taken to a more suitable facility, there always are operations that help transfer patients . Family members frequently will look for jet ambulance charters with the help of the yellow pages.