MPASS: Mizzou Point of care Assessment System

MPASS Concussion Video The Mizzou Point-of-care Assessment System MPASS (Patent Pending) is designed to provide portable and affordable in-clinic assessments that incorporate dynamic balance, motor function, dual-task deficits, and reaction time. MPASS applications include diagnosis and monitoring for concussion, mild cognitive impairment, fall risk, frailty, anterior cruciate ligament return to play, sport performance, injury risk, knee/hip arthroplasty, and other clincal and rehabilitation applications that assess human movement. The MPASS can quantitatively measure dual task deficits of postural responses during dynamic balance and functional movement tasks. Motor function, postural control, dual-tasking, and reaction time are impaired for individuals who sustain a concussion and individuals with cognitive impairment. The MPASS combines lightweight portable force plates, markerless motion capture, and reaction time measurements to provide a more affordable and a more precise multi-dimensional assessment solution. The total cost of the testing platform is under $750, plus the cost of a connected computer. MPASS motor assessments typically take less than 15 minutes.

MKATS: Mizzou Knee Arthrometer Testing System

MKATS Video Abnormal knee motion has been linked to injury risk and pathology. Methods to accurately measure bone motion during dynamic activities, particularly non-sagittal plane motion, are not currently available in the clinic.  Marker based methods to measure tibiofemoral motion are limited by skin artifact. Radiographic methods, such as dual fluoroscopy, are limited by high cost and limited access to specialized equipment.  The MKATS (Patent Pending) is a portable device that accurately measures three-dimensional tibiofemoral motion during dynamic activities. The MKATS uses electromagnetic motion sensors and clamps fixated to bony landmarks of the distal femur and proximal tibia. A series of calibration steps and computational algorithms determine the knee axis-of-rotation and anatomical axes. Flexion-extension, varus-valgus, and internal-external rotation angles are reported during dynamic activities such as step-up. The device has been successfully used to measure tibiofemoral motion efficiently and accurately during functional activities in the clinic. 

The images show the MKATS during a step-down task for a subject wearing an ankle foot orthotic (AFO). The graphs show differences in knee motion (20 subjects) for step-down activities with (AFO) and without (Control) an ankle foot orthotic. Statistically significant differences in knee motion  have also been measured between healthy and ACL deficient populations.