Table 2. Comparison between initial and current thresholds.

	Contact	Initial (Voltage – Side effect)	Currently (Voltage – Side effect)	Δ Volts	Δ Time (months)
Patient 1	0	2.9 – tingling left hand	0.5 – bilateral hand tingling	−2.4	75
	1	3.2 – pulling face, cheek, jaw	1.2 – left neck and face pulling	−2.0
	2	3.0 – tingling left face/arm	1.2 – cloudiness of thinking	−1.8
	3	3.8 – tingling left face/arm	0.9 – pulling left face and tongue	−2.9
	Impedance	1291 Ω	Postop - 1285 Ω; Chronic - 747 Ω
	Current density	3.15 µC/cm2/phase	1.99 µC/cm2/phase
Patient 2	0	2.0 – tingling right face	0.5 – tingling right hand	−1.5	99
	1	2.5 – tingling right face	0.8 – tingling right hand	−1.7
	2	4.0 – pulling right face	1.5 – tingling right hand	−2.5
	3	6.0 – pulling right face	0.8 – tingling right hand	−5.2
	Impedance	848 Ω	Postop – 915 Ω; Chronic - 730 Ω
	Current density	5.49 µC/cm2/phase	6.16 µC/cm2/phase
Patient 3	0	2.6 – bilateral arm tingling	1 – tingling hand	−2.5	47
	1	4.1 – tingling right arm	1 – tingling hand	−4.0
	2	6.0 – no side effects	0.3 – tingling hand	−5.7
	3	6.0 – no side effects	3.3 – tingling hand	−2.7
	Impedance	1099 Ω	Postop - 1343 Ω; Chronic - 658 Ω
	Current density	10.55 µC/cm2/phase	7.13 µC/cm2/phase