Development of Device to Analyze the Motion of the Knee Joint Biomedical Engineers: Tera George Kelly Braun Advisor: Dr. John Dawson, Orthopaedics

Project Definition Design, build and test a device which will hold the femur of a dog and allow unconstrained motion of the knee joint. Using an imaging modality we will analyze the difference in movement between injured and non-injured knees.

The Anatomy of the Knee The knee consists of four bones--patella, tibia, femur, and fibula. Patellar Tendon Four main ligaments

The Anatomy of the Knee

Previous Work Literary search completed Dissected and Stored legs for testing Sketched first and second draft of our design Understand working relationship between knee joint and quadriceps muscle Determined dimensions of our device

Current Work Forming our parts list Redesigning the base to our device Ordering our parts Still gathering dog’s legs for testing

Future Work Build our device once we receive our parts Test the dog’s legs in the device Gather more dog’s legs Analyze the results and determine what the differences in movement are between injured and non-injured knees.

Constraints/Specifications Able to hold onto quad muscle High enough for tibia/fibula to swing without hitting the ground Sturdiness Allow for full six degrees of movement Enough room on bones to place the pins for the imager to see them Allow various sizes of dog’s legs

Dogs to People Ideally, this analyzing system would like to be performed on a human’s knee, but since the dog’s knee is fairly similar to the human’s knee, we can study the movement of the dog’s knee and apply what we learn to a human knee

The End