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On-field assessment of concussion: clinical utility of the King-Devick test

Authors Legarreta AD, Mummareddy N, Yengo-Kahn AM, Zuckerman SL

Received 6 December 2018

Accepted for publication 1 August 2019

Published 21 August 2019 Volume 2019:10 Pages 115—121

DOI https://doi.org/10.2147/OAJSM.S171815

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Cristina Weinberg

Peer reviewer comments 3

Editor who approved publication: Prof. Dr. Andreas Imhoff


Andrew D Legarreta,1 Nishit Mummareddy,1 Aaron M Yengo-Kahn,1,2 Scott L Zuckerman1,2

1Vanderbilt Sports Concussion Center, Vanderbilt University School of Medicine, Nashville, TN, USA; 2Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, TN, USA

Correspondence: Scott L Zuckerman
Department of Neurological Surgery, Vanderbilt University Medical Center, Medical Center North T-4224, Nashville, TN 37212, USA
Tel +1 914 980 3339
Fax +1 615 343 6948
Email scott.zuckerman@vumc.org

Abstract: Sport-related concussion (SRC) is an important public health concern with up to 3.8 million SRCs occurring each year. As the incidence and rate of SRC increases, reliable and valid tools for diagnosis and management are needed. The King-Devick (K-D) test assesses a patient’s visual function based on reading a series of numbers as well as counting both time to completion and errors. Its rapid administration time and simplicity make the K-D test a potentially useful SRC diagnostic tool, though limitations exist in baseline testing and what constitutes an abnormal score. Additionally, the K-D tests should never be used in isolation to diagnose a concussion, but rather as one test in conjunction with additional clinical measures, as part of an individualized approach to each patient. The current review examines the clinical utility of the K-D test.

Keywords: King-Devick test, sport-related concussion, narrative review, SRC


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