NuVasive Specialized Orthopedics, Inc.

Disclosed herein are lock mechanisms configured for locking and unlocking rotation of a driver and a driven gear system in implantable distraction and compression systems, and implantable medical devices and implantable distraction and compression systems including such lock mechanisms. The lock mechanisms include a keeper that is configured to move from a locked position to an unlocked position in response to a rotation of the driver, wherein, in the locked position, the keeper is configured to resist rotation of the driven features and the driver under a load on the driven features, and in the unlocked position, permits rotation of the drive gear and the driver.

An adjustable implant system configured to non-invasively guide bone growth in a patient. The adjustable implant system includes a tether having a first end coupled to a fixed bone anchor and a second end coupled to an adjustable bone anchor. The adjustable bone anchor includes a driver disposed within a housing and the driver is configured to actuate in response to an externally applied magnetic field. The adjustable implant system includes an external adjustment device configured to non-invasively actuate the driver disposed within the adjustable bone anchor. Non-invasive actuation of the driver can cause the adjustable bone anchor to increase or decrease the amount of tension on the tether.

One aspect of the disclosure relates to an aspect of the disclosure relates to an adjustable implant including: a housing; a first adjustable member at least partially positioned within the housing and moveable relative to the housing; and a first actuation assembly positioned within the first adjustable member and configured to move the first adjustable member relative to the housing.

The present disclosure broadly provides applications of communication at ultrasound frequencies to establish transcutaneous data communication between medical devices located on and/or within a body of a patient, including inter alia: features for adjustable implants including data communication, hermetic containment, and torque amplification features.

Aspects of the disclosure relate to an adjustable implant configured to be implanted into a patient that includes an adjustable portion moveable relative to a housing. The adjustable implant may include various smart components for enhancing operation of the implant. Smart components may include a controller for managing operations and a transducer for communicating ultrasound data with an external interface device. Additional smart components may include a load cell within the housing for measuring an imparted load; a sensor for measuring angular position of the adjustable portion; a dual sensor arrangement for measuring imparted forces; a reed switch; a half piezo transducer; and an energy harvester.

One aspect of the disclosure relates to an aspect of the disclosure relates to an adjustable implant including: a housing; a first adjustable member at least partially positioned within the housing and moveable relative to the housing; and a first actuation assembly positioned within the first adjustable member and configured to move the first adjustable member relative to the housing.

Implantable medical devices are disclosed herein, having a biocompatible housing; a driver of rotational motion; a receiver of rotational motion; and an interface configured to transfer torque from the driver to the receiver. In various embodiments, the interface comprises magnetic, mechanical, or magnetic and mechanical elements for transferring torque.

A system for moving a portion of a patient's body including a housing having a first cavity extending along a longitudinal axis, a first distraction rod having a proximal end and a distal end, the first distraction rod and the housing being telescopically displaceable with respect to each other along the longitudinal axis, the first distraction rod having a cavity extending along the longitudinal axis, a second distraction rod having a proximal end and a distal end and configured to be telescopically displaceable from within the second cavity along the longitudinal axis, and a drive system configured to move the first distraction rod in relation to the housing and to move the second distraction rod in relation to the first distraction rod.

Various implementations include implants and related methods for moving bone. Certain implementations include an implant for moving bone in a patient's body, the implant including: an implantable biocompatible housing; a first adjustment rod at least partially overlapping the implantable biocompatible housing; a driver configured to drive the first adjustment rod to enable movement of the first adjustment rod relative to the housing; and a load sensor positioned within the housing and configured to indicate a load applied by the driver on the first adjustment rod.

One aspect of the disclosure relates to an extramedullary distraction and compression system. The extramedullary distraction system includes: a housing configured to be attached to a bone at a first location, the housing having a magnet and a lead screw positioned therein, wherein the lead screw is coupled to the magnet such that rotation of the magnet causes rotation of the lead screw, at least one retainer clip disposed around the lead screw; a rod configured to be attached to the bone at a second location and configured to interact with the lead screw such that, upon rotation of the lead screw, the rod distracts or contracts relative to the housing.