3.1
NICE did a rapid review of the published literature on the efficacy and safety of this procedure. This comprised a comprehensive literature search and detailed review of the evidence from 9 sources, which was discussed by the committee. The evidence included 8 before-and-after studies. It is presented in the summary of key evidence section in the interventional procedures overview. The committee also considered safety data from a coroner's regulation 28 letter. Other relevant literature is in the appendix of the overview.