Diagnostics Knee Arthrometer for Detecting Anterior Cruciate Ligament (ACL) Structural Changes

Tech ID: 22962 / UC Case 2012-230-0


Researchers at University of California, Davis have developed a device that has a potential to detect ACL changes that may be predictive for subsequent catastrophic injury.

Full Description

The Anterior Cruciate Ligament (ACL) is a major knee ligament that is commonly injured in athletes and these injuries are a significant clinical issue. The ability to quantify ACL behavior quickly in vivo provides a means to explore a variety of theories regarding knee injury mechanisms and interventions to prevent ACL injury.

Researchers at UC Davis have developed a device that allows relatively rapid (within minutes) quantification of the anterior/posterior shear force displacement (F-D) of the human knee, which is an indicator of the F-D behavior of the ACL. This device has potential as a diagnostic tool to detect ACL changes that may be predictive for subsequent catastrophic injury and therefore could be useful for physicians.


  • Quantify the F-D behavior of an ACL in-vivo
  • Pre-injury diagnostic tool


  • Real time continuous, force-deformation, display and recording
  • Direct measurement of the relative location of femur and tibial tuberosity to eliminate displacement errors that can result from soft tissue deformation
  • Vertical orientation of the leg during testing to apply a traction force at the knee to eliminate bone cartilage contact forces contributing resistance to tibial shear displacement
  • Vertical orientation of the leg to prevent the wight of the leg and testing device from applying a tibial shear force

Patent Status

Country Type Number Dated Case
United States Of America Issued Patent 10,327,694 06/25/2019 2012-230

Additional Patent Pending


Learn About UC TechAlerts - Save Searches and receive new technology matches


  • Hawkins, David

Other Information


Knee arthrometer, in-vivo ACL strain detection

Categorized As