Quote from UA website --- "Portable dialysis machines--- Portable dialysis machines cannot be used on board the aircraft, however, qualified customers with a disability using these devices are permitted to carry them on board provided they can be stowed in the passenger cabin consistent with applicable TSA, FAA and other regulations governing carry-on luggage. These machines are not included in the maximum number of allowable carry-on items or checked bags. If the device is a size or shape that is unable to fit in the cabin, it can be checked in and transported in the cargo hold free of charge."
Last edited by Two Bee; Jan 21, 2018 at 1:33 pm
Reason: exact quote from UAL website re dialysis machines