*2.2.4 Follow-up time and efficacy evaluation after SHPB treatment*

At present, there is no reliable follow-up data of big data, but according to the existing experience, the effective rate is 70%, the duration is 1–3 years, and there is no serious complications related to nerve block. Sacral neurotomy as the predecessor of nerve block treatment appeared 20 years ago, but the technology of nerve block by drugs is still very young. The improvement methods can be as follows: to study the characteristics and efficacy of different nerve blockers, to improve the puncture approach and the position of the blocking point, etc. [15]. SHPB is a new way of treatment. There are no data about future fertility. The upper and lower abdominal nerves are the proximal part of sacral nerves. The same reason is that there are few data at present, which cannot explain the effect of nerve block on fertility, sexual function and urination function.
