The type or quantity of food he consumes seems to have no bearing on how much he bloats.He can still belch & pass gas.The problem is,it doesn't matter how much of either he does,he still bloats back up in a very short period of time. No allergies,no carbonation,simethicone doesn't help. He takes gas relief tablets several times a day with little or no effect.The trache gives him no problems with swallowing or belching.He has to have oxygen with the vent or his blood-oxygen saturation stats drop rather quickly.I would like to know more about the g-tube & the benefits your son derives from it as opposed to any adverse effects he gets from it.Everytime I mention g-tube at the clinic,they shy away from the subject & want to try some other medication or diet changes.Meanwhile,the frustration levels continue to build!This is a miserable problem! Does he have allergies that causes food to not digest well in his stomach? Milk or gluten? Does he drink carbonated beverages? Simethicone doesn't help? You need to see a GI doc with this problem in mind. My son(29) has bloating, but it can be relieved by venting his gastrostomy tube--which I do at least twice a day. Instant relief. Can they "burp" with a trach? For our older dmd guys, gut motility is a problem. I don't know about trachs and vents--what does the pulmonologist say about extra air intake? And please help me with why he needs oxygen with the vent? Could that introduce extra air into his system? I hope others write about what works for them, as sharing solutions may help any/all of us.