In this paper the problem of assessing the lifetime of a non-rechargeable power source of a neurostimulator with constant current stimulation was investigated. Mathematical models based on two different hypotheses about the energy conversion of the neurostimulator were developed. The first hypothesis is based on the assumption that all the energy stored in the non-rechargeable power source of the neurostimulator is converted into the energy transferred to biological tissues. The second hypothesis assumes that all the energy stored in the non-rechargeable power source of the neurostimulator is converted not only into the energy transferred to biological tissues, but also into the energy used in the control and monitoring unit and the energy losses in the pulse generation unit. Validation of the initial and extended mathematical models was performed against a clinician's manual documentation for the commercial neurostimulator Abbott Proclaim 3660 (USA). The area of applicability of the models based on the considered hypotheses was estimated. The extended mathematical model can be used to assess the lifetime of modern neurostimulators with high efficiency (> 90 %) at current amplitudes ≥ 3 mA. Keywords: constant current neurostimulation, non-rechargeable power sources, total electrical energy delivered.

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Дата начала обработки статистических данных - 27 января 2016 г.