@kaki068 Hey I’m not quite sure how to answer that question but I’ll try my best to provide you with a somewhat sensible response:
Firstly, everyone is different and every case has its own unique set of challenges. As I said earlier, this pump is not for everyone. What I do know for sure is that these pain pumps tend to be a last resort treatment. Moreover this pump is mostly offered to people who have responded poorly to all other treatments, so basically it is only offered to those who really need it. And there is a an important psychological aspect to this implant procedure too that you must consider. Initially you have to talk to a psychiatrist and pass a psychological assessment before they even consider giving you this implant. Furthermore, you will likely be asked to do a number of MRIs in order to make sure that your spine is in good enough shape
i.e. that your spine is healthy enough and in good enough shape to even entertain the idea of this implant. So if you already have issues with your spine and/or pain in several different areas of your spine, then this pump likely is not for you. Pain pumps work best for targeted chronic pain. This pump is not made to treat multiple areas of your body at the same time. Instead as I said earlier these pumps target a very specific area of your body.
In my case the pump drips tiny amounts of medicine right ontop of the nerves that causes my pain in my left foot. My catheter is placed low in my spine as it targets the nerves around my L4-L5-S1 area. However before you get to that point you will be assessed both physically and mentally to make sure you are a good candidate for this pump. I hope this may help clarify things and if I was not able to understand and answer your question sufficiently then please accept my apologies. When I give advice it is only based on my own learned experience and I cannot stress often enough how many variables and differences there are in each case. At the end of the day my advice is to always advocate hard for yourself in order to get the best possible medical treatment you deserve and need. These pumps are quite finicky and definitely not for everyone, but it can also be an amazing asset for you and of great help when it works as designed. One must however have a healthy spine and one must pass the psychological exam before they move forward with the actual implant. I hope this information is helpful and I wish you the best of luck with your illness. I hope you find the help you need.

@kaki068 I think the person to ask is a neurosurgeon or pain management specialist. My pain was in my lower back and buttocks. All I can tell you is that after they injected the hydromorphone into my intrathecal space, I felt great relief in about five minutes. Interesting thing... even though the pain in my buttocks was reduced to about a 2, I was still aware of feeling like there was a stone in each butt cheek. It just didn't hurt very much.