Cairdac

Sorin Crm Sas

Cairdac S.a.s.

Willy Regnier

An Nguyen-Dinh

Alaa Makdissi

Julien Dohin

Jean-François Ollivier

Philippe D'Hiver

Martin Deterre

Philippe D'hiver

Steeven Vassal

Patrice Poussin

Thien Hoang

Hélène Viatgé

Jean-Baptiste Pourchet

Guillaume Ferin

Hélène Viatge

Perrine Chaffotte

Florian Leveque

Jean-Francois Debroux

Jean-François Debroux

The harvester comprises a pendular unit comprising a beam that is elastically deformable in bending, a mount clamping a proximal end of the beam, and an inertial mass mounted at a free, distal end of the beam. The beam converts into an oscillating electric signal a mechanical energy produced by pendular unit oscillations. The beam comprises a flexible structure including a central core, a piezoelectric layer on at least one face of the central core, and at least one surface electrode on an external face of the piezoelectric layer. The central core of the flexible structure is made of a semiconductor material adapted to form an integrated circuit substrate. The substrate made of a semiconductor material of the central core includes monolithic integrated structures, and the arrangement, over the extend of the central core substrate, of said integrated structures forms in the longitudinal direction a plurality of successive areas having different bending stiffness coefficients from an area to another.

Piezoelectric-transducer energy harvester, in particular for powering an autonomous cardiac capsule, with a bending stiffness gradient oscillating structure

An energy harvesting module includes a pendular unit with piezoelectric transducer elastically deformable in bending between a clamped end and a free end coupled to an inertial mass. The piezoelectric transducer includes two coplanar piezoelectric beams arranged side-by-side on either side of a central axis of the transducer, each of the piezoelectric beams including adjacent external and internal arms, arranged side-by-side and formed single-piece. The external arm of each beam has a clamped proximal end and a free distal end, and the internal arm of each beam has a free proximal end supporting the inertial mass, and a free distal end connected to the distal end of the adjacent external arm by a common junction.

Energy harvesting module with dual-cantilever piezoelectric transducer, in particular for powering a leadless autonomous cardiac capsule

An energy harvesting module includes a pendular unit with piezoelectric transducer elastically deformable in bending with a clamped end and a free end coupled to an inertial mass. The transducer includes at least one piezoelectric beam configured into two adjacent arms formed single-piece, with external and internal arms arranged side-by-side. The external arm has a clamped proximal end and a free distal end, and the internal arm has a free proximal end supporting the inertial mass, and a free distal end connected to the distal end of the adjacent external arm. An annular mount surrounds the beam at its proximal end and includes the clamp to which is fastened the proximal end of the external arm. The mount includes, in a central region in the vicinity of the clamp, a cavity inside which the inertial mass carried by the free proximal end of the internal arm can oscillate.

Energy harvesting module with compact-construction piezoelectric transducer, in particular for powering a leadless autonomous cardiaccapsule

The pendular unit comprises a piezoelectric transducer beam, and an inertial mass mounted at the free distal end of the beam and comprising two half-masses arranged on either side of the beam. A mechanical connection connects the two half-masses to each other on either side of the beam in such a way as to clamp the beam between the two half-masses to secure the inertial mass to the beam, the assembly being devoid of glue between the half-masses and the beam.

Pendular unit with an inertial mass mounted on a piezoelectric beam, in particular for an energy harvester in a leadless autonomous cardiac capsule

The module comprises, in an envelope tube, a pendular unit comprising a piezoelectric transducer, PZT, beam, an inertial mass coupled to the free end of the beam, and a beam mount secured to the tube and fastened to a clamping part of the beam. The module further includes a symmetrization insert for calibrating and symmetrizing the pendular unit oscillations in transverse and lateral directions. The symmetrization insert is distinct from the beam mount and comprises a peripheral portion secured to the tube independently of the beam mount, and a central portion with an axial through-cavity inside which the beam extends in said region of free travel. The axial cavity extends between opposite travel limitation surfaces, which are symmetrical and capable of coming into contact with the beam in a bending configuration of the beam.

Piezoelectric energy harvester with a controlled deflection beam, in particular for powering a leadless autonomous cardiac capsule

The device has a device body with a front face at its distal end, and a means for the anchoring of the medical device to a patient's organ wall. The anchoring means includes a screw with a helix wire wound into a plurality of non-contiguous turns, the screw having a clamped end integral with the front face of the device body and a free end with a beveled end defined by at least one oblique surface. The helix wire includes, at its free distal end, a terminal region whose wire bending stiffness is lower than in a proximal region of the helix turns. The stiffness difference may, in particular, be obtained by varying the wire diameter over different successive portions, with decreasing diameters in a proximal to distal direction.

Implantable medical device with a flexible helical anchoring screw

The device, such as an autonomous cardiac implant of the leadless capsule type, has a device body with a means for its anchoring to a patient's organ wall. The anchoring means includes a screw with a helix wire wound into a plurality of non-contiguous turns, the screw having a clamped end integral with the front face of the device body and a free end with a beveled end defined by at least one oblique surface. The normal to the oblique surface of the beveled end is directed away from the front face, in such a way that the oblique surface is directed towards the patient's organ wall. The normal to the oblique surface forms an angle between 30° and 60° with respect to the helix axis, and the screw is elastically deformable in axial compression, with a stiffness coefficient of at most 5 N/mm.

Implantable medical device with a non-traumatic helical anchoring screw

The instrument includes a dual-wall deformable tube, with an inner sleeve, a coaxial outer sleeve, and an imaging module connected to the inner and outer sleeves. An array of transducers is carried by an outer face of the imaging module. The inner sleeve and the outer sleeve are mobile in relative axial translation between: a folded position in which the inner and outer sleeves both have a cylindrical shape, and in which the imaging module substantially extends in the continuation of the inner sleeve; and an expanded position, in which the inner sleeve has a cylindrical shape and the outer sleeve has a flared shape widening on the distal side and in which the imaging module substantially extends with the face that carries the transducers of the array turned in axial direction towards the front of the deformable tube.

Catheter with built-in ultrasound imaging sensors

The implant comprises a tubular body housing an energy harvesting module adapted to convert external stresses applied to the implant into electrical energy, and a rechargeable battery adapted to be charged by the energy harvesting module. During the storage, an external source physically separated from the implant is coupled to the implant rechargeable battery to maintain a minimum battery charge level. An interface circuit of the implant couples surface electrodes to the battery, with switching between: i) a transport and storage configuration where the electrodes are connected to the external source to receive from the latter a battery charging energy and/or to exchange communication signals with the outside through the wire link of the coupling; and ii) a functional configuration in which the surface electrodes are decoupled from the external source after the implant has been implanted. The implant further comprises a data transmitter circuit adapted, in the transport and storage configuration, to send communication signals, via the surface electrodes, on the link coupling to the external source, and/or a data receiver circuit adapted, in the transport and storage configuration, to receive, via the surface electrodes, communication signals transmitted on the link coupling to the external source.

Autonomous cardiac implant of the leadless capsule type, comprising an interface for external communication during transportation and storage

The implant comprises a tubular body housing an energy harvesting module adapted to convert external stresses applied to the implant into electrical energy, and a rechargeable battery adapted to be charged by the energy harvesting module. During the storage, an external source physically separated from the implant is coupled to the implant rechargeable battery to maintain a minimum battery charge level. An interface circuit of the implant couples surface electrodes to the battery, with switching between: i) a transport and storage configuration where the electrodes are connected to the external source to receive from the latter a battery charging energy and/or to exchange communication signals with the outside through the wire link of the coupling; and ii) a functional configuration in which the surface electrodes are decoupled from the external source after the implant has been implanted. At least one of the implant surface electrodes is an auxiliary electrode that is not a cardiac potential detection/pacing electrode. In the transport and storage configuration, the interface circuit couple the auxiliary electrode to the implant rechargeable battery, and in the functional configuration, the interface circuit decouples the auxiliary electrode from the implant rechargeable battery and put the auxiliary electrode to a floating potential.

Autonomous cardiac implant of the leadless capsule type, comprising an auxiliary electrode for charging the battery by means of an external source during transportation and storage

The capsule comprises a tubular body and a front-end unit with an helical screw for anchoring the capsule to a wall of a patient's organ. The front-end unit is mobile in relative axial rotation with respect to the tubular body. A disengageable frictional coupling member allows this relative rotation when, for implantation, the tubular body receives an external rotational stress, and that until a predetermined limit torque triggering the disengagement. At explantation, this disengagement is prevented to allow a joint rotation of the tubular body and of the front-end unit and the unscrewing of the helical screw. It is provided for that purpose two conjugated plates facing each other, with flat surfaces such as circular sectors offset in opposite directions with respect to a radial reference plane, in such a way as to form steps providing an anti-disengagement abutment function.

Autonomous implantable and removable cardiac capsule with a swiveling head and a torque limiter

This disclosure relates to a communication amplification device for an implantable capsule, in particular for an autonomous cardiac stimulation capsule. The amplification device comprises a first holding element and a second element configured to hold the implantable capsule. The first holding element is configured to receive the distal end of the capsule and the second holding element is configured to receive the proximal end of the capsule. The first holding element comprises a communication amplification antenna configured to couple to a distal electrode of the capsule.

Communication amplification device comprising retention elements for an implantable capsule

The implant including an elongated tubular body, having at a first end a releasable device connected to an installation lead, and at a second end a member for anchoring to a heart wall, the tubular body housing a frame supporting an electronic unit. The implant further comprises an accelerometer. This accelerometer comprises a piezoelectric blade extending in cantilever from an embedding section of the frame, in a direction going from the first end to the second end.

Autonomous implantable capsule for heart stimulation

The bending of the catheter is controlled from the handle by a variable tension exerted to a steering cable housed in an offset longitudinal notch of the catheter. The handle comprises: a body adapted to be held in hand by an operator; a piston, axially mobile in rotation and in translation inside the handle body; a first mechanism with a pulley for the winding of the steering cable and a lever for modifying in a controlled manner the tension of the cable and hence controlling the steering of the catheter; and a second mechanism comprising a member for holding a security wire and a member for adjusting the axial position of this wire with respect to the internal tube of the catheter, so as to keep the security wire in tight condition whatever the bend provided to the catheter by operation of the first mechanism.

Delivery system with an operating handle controlling a steerable catheter for the implantation of a leadless cardiac capsule

An energy harvester includes a pendular unit subjected with a piezoelectric beam coupled to an inertial mass. On the clamped side of the beam, a beam frame includes two pressing elements between which the beam is taken in sandwich, each including i) an intermediate part, an internal face of which presses on a corresponding face of the beam, and ii) a pressure plate, an internal face of which presses on an external face of the intermediate part, a printed circuit board being interposed between them. The intermediate parts and the pressure plates are passed through by at least one common transverse bore receiving a locking pin. The intermediate parts, the pressure plates and the pin are each massive metal parts ensuring a direct electrical and mechanical contact with the electrodes of the beam and with the printed circuit boards.

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Longjumeau, France

Willy Regnier