Amy...from what I have been told and from what we have seen, on this board, yes, the stents need to be replaced due to clogging unless of course, it is a metal stent. Metal stent clog also however, they can be cleaned out but, plastic stents have been replaced every 3 to 6 months (rarely, 9 months) as they appear to be a major contributor to infections. I would definitely have an infection ruled out due to a clogged stent. There is always something to be learned with this cancer and your Mom may just be the exception. Amy, this is what I know. Others may have more to add to this. Stay vigilant, and you may want to consider consulting with another physician. I am thrilled though, to hear that your Mom is feeling tons better already and I am wishing for her to continue to stay on this path.
THIS INFORMATION IS NOT INTENDED NOR IMPLIED TO BE A SUBSTITUTE FOR PROFESSIONAL MEDICAL ADVICE. YOU SHOULD ALWAYS SEEK THE ADVICE OF YOUR PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROVIDER