This is a phase II, randomized, sham controlled, clinical trial. This clinical trial has as primary objective to evaluate changes in depressive symptoms of a transcutaneous Vagus Nerve Stimulation (tVNS) treatment protocol for patients with moderate / severe depressive episode.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
40
tVNS will be applied by the external simulator (Monarch). The stimulation will be conducted at a frequency of 120 Hz with pulse duration of 250 microseconds. The current intensity will be individually established and should be equivalent to a slight feeling of not painful paresthesia .The stimulus generates a pulse and asymmetric biphasic waveform. Electrodes (25cm2) will be placed over the mastoid process bilaterally. The study protocol will follow the rational of our previous trials with TNS.
• Hamilton Depressive Rating Scale version 17 items (HDRS-17)
This clinical trial has as primary objective to evaluate the effect of the tVNS on depressive symptoms measured by the Hamilton Depressive Rating Scale version 17 items (HDRS-17) in patients with moderate / severe depressive episode.
Time frame: Change from baseline in depressive symptoms at 2 weeks
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