I'd like to learn as much as I can about J-tubes as I am thinking I could need one down the line. I am really confused about all the different types. Could someone explain them? Also I understand that there are different types of tubes by the way they are secured. Can someone explain that too. Finally, if your small bowel is slow, how do they determine if you could tolerate a J tube and how do they determine the delivery rate? Oh, and one last question, does the tube hurt or irritate the small bowel? Any info anyone can give would be appreciated. thanks!