We have done this and ewwww

We use a number 8 feeding cath...soft vygon and just insert it in there and infuse. We infused it over usually the same amount of time as a feeding...because it was usually the same amount as it came right back out the ileo within a short period of time. If it were more, then we just infused over an hour or so.
The thought is that since it is coming out as fast as it goes it, then you just put it thru the large bowel for more absorption of nutrients and water. We haven't used it to wean kids off of HAL, but we have done it from a nutritional aspect.
We all draw straws for that kid...ewww LOL Just kidding!
Do you guys window your HAL's at all? We do this on all our gut kids from day one...we even delay putting them on HAL until they are feeding just to try to keep their livers intact for a bit.