GJ-tubes need to be flushed more often than G-tubes. The J-port is particularly likely to clog because of the longer length and smaller diameter of the tube. The J-port should be flushed every 4-6 hours, especially after medications have been given, and after feeds have ended. Water should be flushed slowly into the J-port each time. It is usually OK for parents not to wake in the middle of the night to flush the J if feeds are running continuously.
The length of the J portion can be 15cm, 22cm, 30cm, or 45cm, and the amount of water needed to effectively flush the tube will vary depending on the length of the tube. To avoid clogs, the J portion should be flushed often and with the amount of water recommended by the physician, especially after medications have been given and after feeds have ended. Make sure it is enough to clear the extension set and the J tubing.
If the J-port does clog and cannot successfully be unclogged, it will have to be replaced.