OrthoSensor™ VERASENSE™ Knee System
OrthoSensor, Inc., Sunrise, FL
The VERASENSE is an intelligent single-use surgical device used during total knee arthoplastic (TKA) surgery to help the surgeon balance and align the knee. The device uses a sensor to give the surgeon feedback on load on the knee as well as mechanical alignment of the patient’s leg.
The device uses RFI to communicate to the non-sterile field where a graphic user interface provides the surgeon with real-time quantitative data to enable evidencebased decisions regarding component position, limb alignment, and soft tissue releases to achieve balance and stability through a full range of motion.
VERASENSE is compatible for use with multiple knee implant systems and utilizes proprietary sensor and accelerometer technologies to sense dynamic loads and femoral contact point in the medial and lateral compartments of the operative knee through a full range of motion, and to verify limb alignment.
The device is intended to address the leading causes of early implant failure in TKA: instability, malrotation, and malalignment. Research published in the HSS Journal, the musculoskeletal journal of the Hospital for Special Surgery, has shown that instability and misalignment cause approximately 36 percent of all orthopedic implant failures.
Exo Dynamics LLC – ExMS
Jorge Sanz-Guerrero, Dan Johnson, Sam Beckett,
Alejandro Catalan, and James Buquet
Exo Dynamics LLC, Ann Arbor, MI
Exo Dynamics is a medical device startup dedicated to creating the next generation of innovative spinal orthoses, devices meant to provide support and mobility. Its first product is based on PhD work conducted by its Chief Technology Officer Daniel Johnson. Exo Dynamics currently has an option agreement with the University of Michigan to use the IP for further business development.
Its first product is the ExMS-1, an “electromechanically activated” back brace. Unlike current braces, our device focuses not on increasing abdominal pressure, but on transferring the weight of the torso to the hip. This gives support to the back muscles, thus reducing their effort. By changing its shape as the user moves, it allows for free motion of the user, maintaining support through a wide variety of postures, thus substantially reducing the strain on the lower back muscles and spine.
The ExMS-1 is able to provide these features due to active mechatronic technology, which incorporates an electronic control system that takes input from a network of sensor elements around the back brace and then adapts the controls and actuators in real-time to maintain a pre-programmed level of support for its user. As the user moves, the orthosis tracks this motion, calculates the new parameters needed for the desired pre-programmed back support, and adapts the device accordingly.
As the patient recovers, a clinician could remotely adapt the orthosis mechanical response (range of motion, mechanical stiffness/damping) that gradually reintroduces motion while lowering support, thus leaving the patient with a more normal level of spinal mobility and reduced need for further physical therapy. Additionally the device could also be programmed with prescribed exercise routines, helping with the compliance of a patient’s treatment.