Patent ID: 11944832
Assignee: SYNERGIA MEDICAL
Field: Medical technology (Instruments)
Classification: CPC A  H | IPC A  H

Claim 17:
18. An active implantable medical device (AIMD), for electrical stimulation of a tissue, the AIMD comprising:
an encapsulation unit (50) suitable for being subcutaneously implanted and comprising a housing (50h) enclosing,
an implanted energy pulse generator (IPG) (51) coupled to a light source (53L), for delivering optical energy pulses of optical power (Popt),
a source of power (52) for activating the IPG (51) and configured for generating a battery power (Pbat) which can be varied,
an implanted controller (54) configured for instructing the IPG to deliver optical energy pulses of a given power (Popt) as a function of time, and

an implanted energy transfer unit (40) comprising a stimulation optical fibre (41s) comprising a proximal end optically coupled to the light source (53L), and a distal end coupled to a tissue coupling unit (60), for transferring optical energy from the light source (53L) of the encapsulation unit to the tissue coupling unit (60),
the tissue coupling unit (60) is suitable for being subcutaneously implanted and coupled to a tissue at a location separated from the encapsulation unit (60) and comprises,
an insulating support (64) supporting,
an electrical circuit (62) configured for delivering electrical pulses of a given target intensity (It) and comprising,
a photovoltaic unit (PV-unit) (61) comprising one or more photovoltaic (PV) cells (61p), positioned in optical contact with the distal end of the optical fibre (41s) for transforming the optical energy pulses transmitted by the optical fibre into electrical energy pulses of the target intensity (It),
electrical conductors for transferring the electrical energy pulses to electrodes (61) mounted on the insulation support (64) such as to be in electrical contact with the tissue when the insulation support is coupled to the tissue,, wherein
the light source (53L) is an addressable optical emitters array, the optical emitters array comprising M>1 apertures addressable independently one by one or by sub-groups of apertures, and wherein
the implanted controller (54) is configured for determining an optimal number (m≤M) of apertures addressed at a time such as to minimize the battery power (Pbat) to generate the optimal optical power (Popt).