Table 4.

Use of IONM (intraoperative neuromonitoring) and the rate of RLNP (recurrent laryngeal nerve palsy) per NAR (nerves at risk) in patients with GD.

Parameter	Number of NAR (%)	Unilateral RLNP * per NAR	Bilateral RLNP * per NAR	Postoperative not Examined
NAR	3429 * (100%)	134 (3.9%)	4 (0.1%)	97 (2.8%)
only visualization RLN	16 (0.5%)	0 (0%)	0 (0%)	0 (0%)
IONM	3409 (99.4%)	134 (3.9%)	4 (0.1%)	95 (2.8%)
intermittent IONM	2656 (77.4%)	108 (4.1%)	4 (0.1%)	72 (2.7%)
continuous IONM	753 (22.0%)	26 (3.4%)	0 (0%)	23 (3.1%)
no visualization, no IONM	4 (0.1%)	0 (0%)	0 (0%)	2 (50%)

* The procedures carried out during the evaluation period included 3489 nerves at risk, the intraoperative use of neuromonitoring or visualization was documented in 3429 nerves at risk. A postoperative laryngoscopy was done in 3332 nerves at risk, in 97 nerves at risk the postoperative examination of the vocal cord function was omitted. NAR—Nerves at risk; RLN—recurrent laryngeal nerve; IONM—intraoperative neuromonitoring; RLNP—recurrent laryngeal nerve palsy; vocal cord immobility was defined as palsy; impaired but notable vocal cord movement was defined as incomplete palsy. Both conditions were counted as impairment of RLN function.