1 Sim Italia S.r.l./Concentrator The compact Travel Some portable oxygen concentrator functions in the car with a cable connection to the cigarette lighter outlet. The 12-volt unit also uses battery power.

2 Uplift Technologies/Lifting Cushion Designed to lift up to 80 percent of a user's weight, the UPlift Seat Assist can support 80 to 350 pounds.It can help relieve pressure and pain from knee and hip joints when getting up from a seated position, according to the manufacturer.

3 Fisher & Paykel Healthcare/CPAP System Weighing 5 pounds, the HC200 Humidified CPAP system has a full range of settings so it can be customized to the patient, according to the manufacturer. Each unit has two humidification chambers, a 6-foot tube and a replacement filter.