I leaked all the time. Like I said before, a leaking drain was far more painful than the liver surgery. I had 3 new tubes and another 3 adjustments in a month. Yes, leaking can start over again once you go home. The good news is there is a certain “feeling” you recognise so you can go back to the hospital before it becomes excruciating. Believe me, once you know the feeling of a leaking drain you remember it and GET TO THE HOSPITAL ASAP and they can adjust the drain and manage the pain before it sets it like it does when you first get the drain. You recognise it is plugging up because the “fire” feeling of having your insides eaten away by acid starts to fade. You might still feel pain from the actual drain where it is rubbing, but it is bearable with pain killers. Your brother will know what I mean by “fire”. When that lessens, things are on the up.
I know this might sound obvious, but if he stays still it will not hurt as much and in my experience, the leaking stopped quicker. It was when I didnt listen to my body and would do stupid things like clean the house or walk (despite feeling the beginnng of the “fire”) that things would go rapidly down hill and I would have intense pain and end up back in the hospital. On the other side, if I just stopped and stayed in bed for a couple of days, the “fire” would go away.
The other thing I noticed was that different nurses have different techniques to clean and flush the drain. I am positive that one nurse and her rough handeling caused the drain to shift and leak again. So ask your brother to watch the nurses and see if anyone is being too rough and if so to bring it up with someone.