ELYRIA, Ohio — The Federal Aviation Administration has approved Invacare Corp.'s XPO2 portable concentrator, introduced in May 2008, for airline travel. The company said it will now approach individual airlines for their approvals. Southwest Airlines has already approved the system.

The XPO2 weighs 6 pounds and incorporates Sensi-Pulse technology, a five-setting pulse dose oxygen delivery system that keeps patients saturated during all activities of daily living.