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FAQ: How important is proper sensor position and secure attachment?

FAQ: How important is proper sensor position and secure attachment?

By Laurie Tyrrell-Schroeder Laurie Tyrrell-Schroeder, DVM | Updated on | Equipment, Head Sensor Guidance, Instrumentation, Locked, LT Schroeder, Pelvic Sensor Guidance, RF Sensor Guidance

  Answer: Sensor positioning is important due to the necessary orientation of the sensing element (accelerometer or gyroscope) inside of the sensor device relative to the horse. But more specifically, each sensor has a somewhat different level of “forgiveness” in terms of the importance of precise positioning. RF SENSOR The right forelimb sensor contains a gyroscope, which should be placed on the dorsal midline of the RF pastern. It measures angular velocity of the distal limb in the sagittal plane. Because of this, rotation of the sensor too far off midline will affect the output of the gyro signal....

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FAQ: Can the Pastern Sensor Be Worn on A Different Limb or Location on the Right Forelimb?

FAQ: Can the Pastern Sensor Be Worn on A Different Limb or Location on the Right Forelimb?

By Laurie Tyrrell-Schroeder Laurie Tyrrell-Schroeder, DVM | Updated on | Equipment, Instrumentation, Locked, LT Schroeder, RF Sensor Guidance, Sensor Guidance

What can be done if the right front pastern is not suitable for attaching the wrap and sensor – for instance on a horse with extremely irritated pastern dermatitis?  Can the sensor be worn on a different limb or location on the right forelimb? A: The RF gyro signal indicates the timing of right forelimb stance, which is used as a reference point for all head and pelvic movement asymmetry calculations in the analysis. The gyro measures angular velocity associated with the movement of the pastern.  REMINDER: Placement of the sensor in the NORMAL ORIENTATION (dorsal aspect, right side up) on...

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FAQ: Does the RF sensor cause artefactual lameness?

FAQ: Does the RF sensor cause artefactual lameness?

By Laurie Tyrrell-Schroeder Laurie Tyrrell-Schroeder, DVM | Updated on | Equipment, FAQ, LT Schroeder, RF Sensor Guidance, Sensor Guidance

A: This is a commonly asked question from horse owners to their veterinarians, especially if their horse measures with a right forelimb lameness.  The effect of the right forelimb sensor on measurement of lameness has been thoroughly tested.  The right forelimb wrap and pastern sensor do not create artefactual lameness. The sensors weigh less than 30 grams, which is quite inconsequential to a horse. The wrap, while applied snugly, should not be applied so tight that it causes irritation to the horse. Another important consideration regarding the pastern wrap, is that even if the presence of the wrap...

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FAQ: Why don’t we put sensors on the limbs to measure limb movement?

FAQ: Why don’t we put sensors on the limbs to measure limb movement?

By Equinosis Logo Equinosis Staff | Updated on | Equinosis Staff, Equipment, FAQ, RF Sensor Guidance, Sensor Guidance

Photo credit: TheHorse.com ­A: While the Equinosis Q does use one sensor on the right forelimb, it is not to quantify lameness, but only to indicate right forelimb stance. There is much evidence in the literature to support that limb movement, whether it include many joint angle changes, stride length, amount of limb protraction or retraction, the shape of the hoof flight trajectory, the amount of limb abduction and adduction of the limb, etc… is less SENSITIVE and SPECIFIC than vertical motion of the torso. This is due to the greater stride-by-stride variability of these other parameters. These movement parameters...

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FAQ: How important is proper sensor position and secure attachment?

FAQ: Can the Pastern Sensor Be Worn on A Different Limb or Location on the Right Forelimb?

FAQ: Does the RF sensor cause artefactual lameness?

FAQ: Why don’t we put sensors on the limbs to measure limb movement?