Feasibility of Attachable Ring Stimulator for Intraoperative Neuromonitoring during Thyroid Surgery

Table 2

EMG amplitude profiles of recurrent laryngeal nerve and vagus nerve stimulated by the attachable ring stimulator and conventional stimulator.

Patient no.	Side	V1 (μV)			R1 (μV)			R2 (μV)			V2 (μV)
		Ring	Conventional		Ring	Conventional		Ring	Conventional		Ring	Conventional
1	Rt	2177	2077	100	2572	2406	166	2361	2460	99	2266	2262	4
	Lt	1128	1177	49	1843	1733	110	2178	2530	352	1563	1191	372
2	Lt	1533	1003	530	1103	1773	670	1587	1635	48	996	1073	77
3	Lt	1735	1581	154	2599	2474	125	2658	2487	171	2182	2176	6
4	Lt	1021	1026	5	1375	1392	17	1216	1241	25	864	949	85
5	Rt	641	677	36	730	809	79	770	699	71	743	654	89
6	Rt	1031	977	54	2278	2188	90	1992	1799	193	1214	1111	103
7	Rt	3004	3043	39	2849	2809	40	2636	2583	53	2771	2539	232
	Lt	1561	1505	56	1469	1518	49	1741	1584	157	1636	1774	138
8	Lt	762	808	46	541	566	25	834	850	16	561	571	10
9	Rt	621	640	19	716	801	85	1460	1356	104	1219	1157	62
10	Rt	660	653	7	788	786	2	862	902	40	690	689	1
	Lt	1026	1058	32	956	981	25	650	603	47	668	634	34
11	Rt	2100	2159	59	2827	2735	92	3639	3633	6	2781	2595	186
12	Lt	607	628	21	1040	1038	2	2403	2040	363	1487	1255	232
13	Lt	849	697	152	1050	727	323	945	818	127	705	546	159
14	Rt	594	525	69	738	578	160	967	953	14	791	757	34
	Lt	1146	1195	49	1666	1746	80	1391	1356	35	1177	1084	93
15	Rt	760	792	32	730	693	37	879	784	95	720	768	48
	Lt	541	579	38	761	747	14	794	824	30	537	557	20
Mean		1175	1140	77	1432	1425	110	1598	1557	102	1279	1217	99
value^†				0.867			0.979			0.876			0.782

^∗Difference between the amplitudes evoked by the attachable ring stimulator and conventional stimulator. ^† value for the mean amplitudes between the two groups.