Value of intra-operative neuromonitoring of the recurrent laryngeal nerve in total thyroidectomy for benign goitre

Objective: This study aimed to evaluate the impact of intra-operative neuromonitoring of the recurrent laryngeal nerve during total thyroidectomy for benign goitre. Methods: A single-centre retrospective study using historical controls was conducted for a 10-year period, comprising a series of 767 patients treated by total thyroidectomy for benign goitre. Of these, 306 had intra-operative neuromonitoring of the recurrent laryngeal nerve and 461 did not. Post-operative laryngeal mobility was assessed in all patients by direct laryngoscopy before hospital discharge and at post-operative follow-up visits. Results: In all, 6 out of 461 patients (1.30 per cent) in the control group and 6 out of 306 patients (1.96 per cent) in the intra-operative neuromonitoring group developed permanent recurrent laryngeal nerve palsy. No statistically significant difference was observed between the two patient groups. Conclusion: Intra-operative neuromonitoring does not appear to affect the post-operative recurrent laryngeal nerve palsy rate or to reliably predict post-operative recurrent laryngeal nerve palsy. However, it can accurately predict good nerve function after thyroidectomy.