I have a 18 year old son with DMD who uses his bipap pretty much 24 hours a day, he does not want to be trached and wants to stay noninvasive with pulmonary support, he is going to have a sleep study done with a LTV 950 Ventilator in a few weeks, just curious if there is anyone out there using the LTV ventilator in this way and if they like it, I have done some reading about it, just curious, I am interested if any one is using any type of oral interface (mouthpiece) with the LTV 950, he trys to stay off bi-pap a few hours a day to give him a break usually in the mornings. Thanks.