Assessment of repeatability of a wireless, inertial sensor-based lameness evaluation system for horses.

This study evaluates the repeatability of a wireless sensor system designed to assess lameness in horses by measuring torso movement asymmetry. The sensor system was found to be sufficiently repeatable, indicating its potential usefulness in clinical applications.

Methods

• The study involved 236 horses of various ages, breeds, and lameness dispositions.
• All of these horses were equipped with a wireless, sensor-based motion analysis system. The system, which utilized an accelerometer and a gyroscope, was placed on the horses’ heads, their midline croup region (part of the pelvis), and their right forelimbs.
• Two evaluation trials were conducted, approximately five minutes apart, during which the horses were trotted in a straight line.
• Data for torso movement asymmetry was obtained through signal-processing algorithms, which calculated stride-by-stride differences and overall trial asymmetry measures.

Results

• The sensor-based measurements of body movement asymmetry were found to be repeatable, meaning the system produced consistent results across the two trials.
• The repeatability of measurements for hind limb lameness was slightly higher than for forelimb lameness, suggesting that this system might be slightly more effective for detecting the former.
• Collecting more stride data slightly decreased stride-to-stride repeatability but did not affect intertrial repeatability. This indicates that the consistency of readings was maintained regardless of the number of strides recorded.

Conclusions

• The research concluded that the sensor-based system used for detecting and measuring lameness in horses, by observing asymmetry in head and pelvic movement, was repeatable enough to warrant further investigation for clinical usage.
• However, more research is needed to refine and further validate the system’s efficacy in clinical settings.