Patent ID: 11857786
Assignee: NEUROLIEF LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A head mounted device for transdermally applying electrical stimulation to a region of a head of a user, the head of the user including a scalp, the head mounted device comprising:
at least a pair of electrodes, configured, when the head mounted device is donned, to engage the scalp of the user and to deliver, via the scalp of the user, a balanced pulse comprising a positive phase train including a streak of constant current positive phases separated by rest times, said positive phase train immediately followed by a negative phase train including a streak of constant current negative phases separated by rest times, each of said positive phases and said negative phases being for providing a predetermined amount of charge to the head of the user;
at least one sensor adapted, when said head mounted device is donned by said user and during transmission of said pulse, to engage the skin of the scalp and to monitor an amount of charge delivered by said positive phases and said negative phases;
an electronic circuit, functionally associated with said at least two electrodes and having a compliance voltage; and
a processing unit, functionally associated with said electrodes to provide instructions thereto and with said at least one sensor to receive input therefrom, said processing unit programmed to:
(a) provide an input causing said electrodes to deliver said balanced pulse via the scalp of the user;
(b) calculate a first time ratio (trp) between a cumulative duration (drtp) of said rest times between said positive phases in said positive phase train and a cumulative duration (dsp) of said positive phases (trp=drtp:drtp), and a second time ratio (trn) between a cumulative duration (drtn) of said rest times between said negative phases in said negative phase train and a cumulative duration (dsn) of said negative phases (trn=drtn:dsn), wherein, at least initially, each of said first and second time ratios is smaller than a predetermined threshold ratio;
(c) receive input from said at least one sensor, the input indicative of an amount of charge delivered by said positive phases and said negative phases;
(d) identify said received input which is indicative of a reduction of charge delivered by one or more of said positive and said negative phases;
(e) upon identification of said reduction, provide input to said electrodes causing said electrodes to adapt at least one said rest time in at least one of said positive phase train and said negative phase train;
(f) calculate a first updated value for said first time ratio and a second updated value for said second time ratio, following adaptation of at least one said rest time; and
(g) repeat steps (a)-(f) using said at least one of said rest time following said adaptation, until:
said processor identifies that said predetermined amount of charge has been provided by each of said positive and said negative phases; or
at least one of said first updated value of said first time ratio and said second updated value of said second time ratio reaches said predetermined threshold ratio and a voltage of said balanced pulse reaches a predetermined voltage threshold.