Hi Mendez
Does he have the stents replaced regularly ? It sounds like it since it is a scheduled replacement. Where Mum has hers done they only replace them if it is needed, which does mean that she has to start feeling ill before they do it but she went three months with the first stent and it’s now five and a half months for the second.
I think they are reluctant to do them on a regular basis as each time you have an ERCP there is a chance of bleeding, infection, and depending on where the stent is going there is a risk of damaging the pancreas.
As marion says though there are plenty of people who have a lot of replacements !
best wishes
Jemima