Back in the old days when I was in nursing school, we used to do what was called a harris flush to get rid of gas in patients that were recovering from surgery. We used an old fashion enema can and let the fluid run in and then lowered the can and let it run back out again. That was done several times and then the can was put on the bedside table, level with the patient and the tube was taped in place. The water was supposed to run in and out on it's own. It was left that way for about 1/2 hour.It sounds pretty gross, but it sure did work wonders. I don't know if this is used any more. It was in the mid 1960's tbat I went to nursing school, probably years before some of you were born.