User's Guide

P/N R63314 v1.08c
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InSite Player Units monitor impact exposure using a novel impact
exposure metric called
HITsp (HIT Severity Profile). HITsp combines
effects of the following into a single numerical index:
• Linear and rotational acceleration,
• Impact location, and
• Impact duration
Since 2004, Riddell has collected millions of impacts on-field at all
levels of play using the Sideline Response System. Based on data
collected during this novel research, HITsp and InSite Alert thresholds
were developed. While InSite
does not diagnose concussions or other
head injuries and is not intended to be used as a diagnostic device,
HITsp does provide for a more specific correlation of on-field injuries and
impact exposure than single factors alone
1
.
ALERT TYPES
InSite provides two types of impact Alerts, “Single Impact” and “Multiple
Impact”. Both Alert types indicate that atypically high head-impact
exposure has been experienced by the player, and that clinical best
practices should be used to conduct an assessment for potential head
injury (concussion). Alert thresholds are customized based on level of
play and playing position on the field. Alerts report atypically high
exposure relative to other players of similar level of play at the same
playing position.
• Single Impact Alerts - Alerts impacts whose severities are above
the predetermined threshold for the player position and play
level as assigned using InSite Player Management software.
Single event Alerts exceed the 99
th
percentile HITsp value for
that skill level and playing position (i.e. the top 1%) based on
field data collected using the Riddell Sideline Response System.
1
Greenwald RM, Gwin JT, Chu JJ, Crisco JJ., “Head impact severity measures for
evaluating mild traumatic brain injury risk exposure”, Neurosurgery, 2008 Apr,
62(4):789-98, discussion 798.