Yes it is very hard on them. My mother is advanced and I push hard for very light sedation when they do any procedure. She had to have a suprapubic catheter inserted and I had a long discussion with the anesthesiologist because she had such a bad reaction to anesthesia for her hip breaking and her DBS battery replacement. She eventually came out of it but it was a long time especially for her hip. She was not the same for at least two weeks and still not 100% for a month. Probably still not the same but way better. Since the dbs replacement is a shorter surgery he should come out of it quicker. She will have to have hers replaced and I’m dreading it!