US 11,944,832 B2
Active implanted device (AIMD) with in situ optimization of power consumption
Pascal Doguet, Mont-Saint-Guibert (BE); Jérôme Garnier, Mont-Saint-Guibert (BE); and Yohan Botquin, Mont-Saint-Guibert (BE)
Assigned to Synergia Medical, Mont-Saint-Guibert (BE)
Filed by Synergia Medical, Mont-Saint-Guibert (BE)
Filed on Sep. 21, 2023, as Appl. No. 18/371,044.
Application 18/371,044 is a continuation in part of application No. PCT/EP2021/057548, filed on Mar. 24, 2021.
Prior Publication US 2024/0009470 A1, Jan. 11, 2024
Int. Cl. A61N 1/37 (2006.01); A61N 1/378 (2006.01); H02S 99/00 (2014.01)
CPC A61N 1/378 (2013.01) [H02S 99/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. 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 optical 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, and a distal end coupled to a tissue coupling unit (60), for transferring optical energy from the light source of the encapsulation unit to the tissue coupling unit (60),
the tissue coupling unit (60) suitable for being subcutaneously implanted and coupled to a tissue at a location separated from the encapsulation unit (50), and comprising,
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 N≥2 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 PV-unit comprises Us units arranged in series, each unit comprising Pp photovoltaic cells (PV-cells) arranged in parallel, or Up units arranged in parallel, each unit comprising Ps PV-cells arranged in series, wherein Us, Up, Pp, and Ps∈N, and Us×Pp=Up×Ps=N=constant,
the electrical circuit (62) comprises switches configured for varying the values of Us and Up, and wherein
the electrical circuit (62) comprises a switch control module configured for controlling the switches yielding optimized values of Us or Up, such that the power (Popt) of the optical energy pulses required for yielding the electrical pulses of the given target intensity (It) is minimized.