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.

A relatively compact implantable medical device includes a fixation member formed by a plurality of fingers mounted around a perimeter of a distal end of a housing of the device; each finger is elastically deformable from a relaxed condition to an extended condition, to accommodate delivery of the device to a target implant site, and from the relaxed condition to a compressed condition, to accommodate wedging of the fingers between opposing tissue surfaces at the target implant site, wherein the compressed fingers hold a cardiac pacing electrode of the device in intimate tissue contact for the delivery of pacing stimulation to the site. Each fixation finger is preferably configured to prevent penetration thereof within the tissue when the fingers are compressed and wedged between the opposing tissue surfaces. The pacing electrode may be mounted on a pacing extension, which extends distally from the distal end of the device housing.

An example fixation component for an implantable medical device (IMD) includes a base and tines extending from the base and being spaced apart from one another. The tines include a penetrator tine and a protector tine. The penetrator tine includes a curved section defining a deformable preset curvature that extends laterally from a proximal section that is fixed to the base, traversing a longitudinal axis of the fixation component, to a distal section that terminates in an incisive distal end that is configured to penetrate a tissue to form a puncture. The protector tine includes a curved section defining a deformable preset curvature that extends from a proximal section that is fixed to the base, outward from the longitudinal axis, to a distal section that terminates in a non-incisive distal end that is configured to pass through the puncture.

A medical tool includes a rotation mechanism that further includes a warning feature. The warning feature provides an indication when the rotation mechanism has achieved a number of rotations.

A biostimulator and a pace mapping system for deep septal pacing. The biostimulator includes a pacing element that extends distally beyond a fixation element. The pacing element is insulated between a distal tip of the fixation element and a distal portion of the pacing element. The pace mapping system can be used to determine a distance between a septal wall of a heart septum and a bundle branch within the septum. The pacing element can be selected based on the distance, and delivered into the septum to pace the bundle branch. Other embodiments are also described and claimed.

Lead fixation devices for mounting at a cranial burr hole and securing a medical lead implanted into a brain through the burr hole. One embodiment comprises a clamp having centrally disposed clamping walls activated by a plunger having actuating tabs. The clamping walls may be an integral part of a device base, or a separate part seated in a central opening of the base. The clamp is activated by pressing the actuating tabs of the plunger into apertures adjoining the clamping walls, which displaces the clamping walls to clamp the lead. Another embodiment comprises a base having a plurality of radial and peripheral lead retention grooves configured to securely retain a substantial segment of the lead at the exit from the burr hole. Still another embodiment comprises both a clamp and peripheral retention grooves to provide a dual fixation and strain relief of the lead within the lead fixation device.

A set of shielded coils for wireless power transmission into a medical implant is described in which the external, power transmission coil is blocked at least on one side by a shield with a broken ring and radial fingers while the power receiver coil inside the medical implant is surrounded by a shield having a broken ring connecting radial fingers and ribs around its circumference. The finger and rib configurations minimizes eddy currents in the shields. A ground plane of the implant's internal circuitry, which is within the shield along with the receiver coil, can cap off the cupped receiver shield to form a Faraday cage with it. The metal or other conductive shielding prevents large electric fields from the coils from penetrating into the tissue of the subject while simultaneously allowing magnetic fields inductively couple the coils for charging. An implant with sensitive electrodes that measure minute voltages from a brain or other tissues is protected from capacitively driven voltage swings or other transients during charging.

Devices and methods for providing neurostimulation to a patient, particularly in trial systems assessing suitability of a permanently implanted neurostimulation. Such trial systems can utilize a trial neurostimulation lead that includes a coiled conductor coupled to a proximal contact connector that is coupled with an external pulse generator. The trial neurostimulation lead can be a coiled conductor of a closed wound configuration that can be stretched to form an open coil portion or gaps between adjacent coils to provide more resistance to migration or regression of the lead.

Systems for treating a cardiac condition of a patient are provided. The system comprises an implantable device for delivering energy to the patient’s heart, and an external patient device configured to wirelessly communicate with the implantable device. The system can further comprise a clinician device for implanting the implantable device in the patient. The cardiac condition treated by the system can comprise atrial fibrillation. Methods of treating a cardiac condition are also provided.

A medical device system for delivering a neuromodulation therapy includes a delivery tool for deploying an implantable medical device at a neuromodulation therapy site. The implantable medical device includes a housing, an electronic circuit within the housing, and an electrical lead comprising a lead body extending between a proximal end coupled to the housing and a distal end extending away from the housing and at least one electrode carried by the lead body. The delivery tool includes a first cavity for receiving the housing and a second cavity for receiving the lead. The first cavity and the second cavity are in direct communication for receiving and deploying the housing and the lead coupled to the housing concomitantly as a single unit.