Re: Hamstring Lengthening Surgery
It has been a fair number of years since I had this surgery myself but, I hope my information can be of some use to you. The pain level from the surgery itself was not nearly as intense as boney or muscular procedures. The difficulty pain wise comes from the post-surgical stretching that is important for a positive outcome. One of the best ways to make this as manageable as possible is to practice relaxation techniques in advance of the surgery to help her feel empowered. There are simple breathing and imagery exercises that can be of great help even for the youngest of children. Also, it is important to let her articulate (at her age and development level) what her fears are and to address them, as the intensity of one's fear tends to have a direct negative effect on pain perception. Also, simple approaches like heat compresses are helpful.
In terms of the surgery itself, the most important indicator of how well it works and how long the effects last is how able you are to stay committed to daily stretching and PT in general. In this regard, your daughter is like an athlete in training. (without the intensity of course) After the initial recovery, daily stretching along with any other recommended PT will help maintain the positive results and help her legs become more limber.
I hope this is of some help to you in your decision.
All the best to you & your daughter,