Demonstration and test cards for the King–Devick (K–D) Test: a rapid sideline screening tool for sports-related concussion based on the time to perform rapid. Background The King-Devick (KD) test is an objective clinical test of eye movements that has been used to screen for concussion. A rapid, cost-effective, and reliable tool that facilitates diagnosis of concussion is needed. The King-Devick (K-D) test is a vision-based tool of rapid number.

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Prior eye movement recorded studies of the K—D test for early detection of hypoxia related cognitive impairment have also shown that errors correlated with hypoxic impairment. Future studies are recommended to investigate the additive effect of sideline K—D test and the new SCAT3 for detection of concussion.

The work performed in this study was not funded by any of the above sources and the remaining authors have no disclosures.

Can J Neurol Sci ; Concussion assessment and management.

The King–Devick test for sideline concussion screening in collegiate football

The K-D test is based on measurement of the speed of rapid number naming. J Neuropathol Exp Neurol. K—D testing data for concussed and non-concussed football players are shown in Table 2.

AllenOD, F.

Author information Article notes Copyright and License information Disclaimer. However, there was no overlap in the distribution of changes in scores from prefight to postfight, with a concjssion gap between the worst change condussion the no head trauma group and the best change in the head trauma group. Consensus statement on concussion in sport: This is similar to prior fatigue studies performed in collegiate basketball athletes DelicataMD, A.


ARVO E-abstract and hockey.

Results of our study show that K-D test time scores have a high degree of test-retest reliability, with ICCs of 0. Posted by Jeffrey S. Standard and routine headgear and sparring-grade boxing gloves were worn.

Rapid screening tools that can be practically implemented into the sideline evaluation of athletes are vital to the detection of concussive injuries.

For this cross-sectional study, boxers and MMA fighters were recruited and enrolled prior to sparring sessions and matches conducted in the Boston, MA, area.

The range of the box corresponds to the interquartile range between the 25th and cooncussion 75th percentile. Corrections were made for near vision as needed. Concussed athletes performed slower on their sideline K—D test compared to baseline with an average slowing from baseline of 4. Impaired eye movement function, particularly for those reflecting subcortical pathways, correlated well with severity of postconcussive symptoms and with limitation of activities of daily living.

Concussion signs and symptoms may develop and evolve over time, particularly within the first hours following injury. Testing procedures Baseline K—D times for all athletes were established during pre-season physical exams with multiple individuals being testing simultaneously in a noisy training room environment. During the playing season, the K—D test and a modified version of the Sport Concussion Assessment Tool 2 SCAT2 were both utilized in the sideline assessment of athletes suspected of head trauma.


The concussive injuries identified in the current study dvick have been less severe as overt head trauma was not always witnessed.

The King–Devick test for sideline concussion screening in collegiate football

Pre-season K—D test 1, median range. Chronic traumatic encephalopathy in athletes: Maguire serves on the editorial boards of OphthalmologyCorneaand Current Opinion in Ophthalmology ; and receives research support from Inspire Pharmaceuticals, Pfizer Inc. Author information Article notes Concusaion and License information Disclaimer.

For purposes of determining test-retest reliability of precompetition K-D scores, all boxers were tested twice within a minute period before their sparring session by the same examiners. Dfvick commentary ” Sideline assessment of sports concussion: Athletes were players from the football team and the men’s and women’s basketball teams. Among boxers, the MACE test was given devidk to those with head trauma.

Documented head injury in early adulthood and risk of Alzheimer’s disease and other dementias. Prefight K-D scores were similar across groups, with slightly lower mean time scores noted for the second prefight testing session table 2. J Neurol Neurosurg Psychiatry ;