17-Year Single Center Retrospective Review of Rate, Risk Factors and Outcomes of Lead Breakage during Sacral Neuromodulation Lead Removal

Abstract

Purpose: One risk of removal of a tined sacral neuromodulation lead is breakage, resulting in a retained lead fragment. This study reports lead breakage rate, risk factors and outcomes of retained fragments. Materials and Methods: We report on 464 tined lead removals from 2002 to 2018. Clinical and surgical factors were reviewed and appropriate statistical analysis performed. Retained fragments were reviewed for fragment description and long-term complications. Results: 464 tined lead removals were included, with 35 lead breaks identified, for a rate of 7.5% (35/464). Factors associated with breakage included male gender (OR 6.58, 95% CI 2.54–17.01, p=0.001) and diabetes (OR 2.42, 95% CI 1.05–5.58, p=0.019). A shorter time interval since implant was protective (OR 0.86, 95% CI 0.76–0.98, p=0.002)). There was no difference in breakage rate based on age, weight, history of prior revision, bilateral leads, reason for lead removal, surgical technique or surgeon. Of the 35 breaks, 27 had imaging available. Of these, 66% (18/27) broke in the tined region, and 81% (22/27) were ghost leads. Most patients, 80% (28/35), with retained lead fragments received another implant. Only one patient had a related complication of additional surgery for pain related to the fragment. Conclusions: There is a low rate of tined lead breakage during lead removal however it is higher than the manufacturer estimate. Protective factors include a shorter time interval between implant and lead revision. The most common location for lead breakage is in the region of the tines, most are ghost fragments and long-term complications are uncommon.