The inomed product offering now includes a compact and powerful HDC Kit for the non-invasive transcranial direct current stimulation (tDCS). The modular system was developed for use in hospitals and research institutions and essentially consists of a programming unit (HDC prog), the stimulator (HDC stim), and the electrode set (HDC Cel), which is also optionally available as a cap (mind cap).
With the tDCS, an electrical field is generated transcranially by applying a weak electric direct current to a patient's head. This technique modulates, suppresses or amplifies the activities of neurones:
Anodal (excitatory) tDCS: the cortical activity and the resting membrane potential are shifted to a lowered depolarisation threshold.
Cathodale (inhibitory) tDCS: cortical excitability is reduced, the resting membrane potential is increased and the depolarisation threshold is shifted in the direction of hyperpolarisation.
The neuronal depolarisation threshold is not exceeded with this form of brain stimulation and thus does not trigger any action potential.
The tDCS technique is increasingly being considered as a potential method of treatment for a number of indications, such as depression, schizophrenia, rehabilitation after a stroke, pain therapy and other illnesses. The tDCS technique can be used together with fMRT, transcranial magnetic stimulation >> (TMS), or also with centrally acting pharmaceuticals.
Users can define a stimulation protocol using the programming unit in the HDC Kit. This means that, if required, the stimulation unit and electrode set can be used by the patient at home.
The physician is always responsible for monitoring the use of stimulation. After a pre-defined series of treatments the need for further treatment and the treatment results can be examined by the stimulator's readout.
The following protocol can be considered as a recommended form of therapeutic treatment using tDCS for a depressive disorder.
Stimulation can, for example, be done using the following parameters: current intensity of 2mA, 20 min per day, with a total of 10 to 15 stimulations within approximately three weeks. Electrode position F3, anodal. Maintenance treatments can be subsequently carried out in one to two week intervals.