My catheter was also on my right upper-chest and fortunately I had it for about four years without any problems and no accident either and I feel very grateful about it.
The important point was for me at all times, to let no water ever to come near the chest-catheter and since water runs everywhere, I just used a flannel from the hip upwards and from the hip downward I used the shower.
Fortunately, the London Water-Board provides interested people with a very gently-and slowly-running shower-head, which not only saves water (which is their interest), but it certainly prevents accidents to happen with fast-running water on my chest-catheter (which was, of course, my interest...). This gently-soft-running shower-head from the London Water Board went really well with me and saved me from any infection and/or accident and I am very grateful for that.
Good luck and best wishes from Kristina.