Since 2000, a number of manufacturers have introduced portable oxygen concentrators that can be used as a travel system. It is very similar to a home oxygen concentrator, but it is smaller in size and more mobile. The portable oxygen concentrator makes it easy for patients to travel freely. They are small enough to fit in a car and most of the major concentrators are now FAA approved. Whether you need a ventilator, CPAP machine, oxygen concentrator, or other type of respiratory aid, you can find it from local durable healthcare equipment suppliers and national medical equipment distribution companies.