Table 4.
Surgical procedures before and after training with intraoperative neuromonitoring
| Period and experience with IONM | The year before introduction of IONM | After 1st exposure to IONM | After 2nd exposure to IONM | After 3rd exposure to IONM |
|---|---|---|---|---|
| Operations with IONM, no. (RLNs at risk) [period] | None [01-12/2011] | 101 (190) [01-03/2012] | 70 (124) [01-03/2013] | 65 (120) [01-03/2014] |
| Operations without IONM, no. (RLNs at risk) [period] | 119 (235) [01-12/2011] | 93 (166) [04-12/2012] | 108 (188) [04-12/2013] | 76 (138) [04-12/2014] |
| Partial resection, no. (%) | 62 (52.1) | 13 (13.98) | 2 (1.85) | 0 (0.00 %) |
| - Subtotal thyroidectomy | 33 (27.73) | 5 (5.38) | 1 (0.92) | 0 (0.00) |
| - Dunhill operation | 29 (24.37) | 8 (8.6) | 1 (0.92) | 0 (0.00) |
| Total resection | 57 (47.9) | 80 (86.02) | 106 (98.15) | 76 (100) |
| - Total thyroidectomy | 34 (28.57) | 53 (56.99) | 70 (64.81) | 56 (73.69) |
| - Near-total thyroidectomy | 20 (16.81) | 8 (8.6) | 8 (7.41) | 6 (7.89) |
| - Lobectomy | 3 (2.52) | 19 (20.43) | 28 (25.93) | 14 (18.42) |
| p value | p < 0.0001a [2011 vs. 2012-2014] | |||
| p < 0.0001b [2011 vs. 2012] | ||||
| p = 0.0019b [2012 vs. 2013] | ||||
| p = 0.5125b [2013 vs. 2014] ns | ||||
p value <0.05 was considered statistically significant. All values represent numbers (%) unless otherwise indicated
IONM intraoperative neuromonitoring, ns non-significant
aChi-square test
bFisher’s exact test