alexa Exertion Does Not Affect the Optic Nerve Sheath Diamete
ISSN: 2165-7548

Emergency Medicine: Open Access
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Research Article

Exertion Does Not Affect the Optic Nerve Sheath Diameter in Healthy Participants

Kyle Friez1*, Matthew Lyon2, Ivan A. Morales1, Ann Marie Kuchinski2, Hongyan Xu3 and Richard Gordon2

1Medical College of Georgia at Augusta University, College of Medicine, USA

2Emergency Medicine, Medical College of Georgia at Augusta University, USA

3Department of Biostatistics, Medical College of Georgia at Augusta University, USA

*Corresponding Author:
Kyle Friez
Medical College of Georgia at Augusta University
College of Medicine, 1120 15th Street
AF 2020, Augusta, GA, USA
Tel: 706-721-4467
E-mail: [email protected]

Received Date: February 22, 2016; Accepted Date: March 9, 2016; Published Date: March 16, 2016

Citation: Friez K, Lyon M, Morales IA, Kuchinski AM, Xu H, et al. (2016) Exertion Does Not Affect the Optic Nerve Sheath Diameter in Healthy Participants. Emerg Med (Los Angel) 6:315. doi:10.4172/2165-7548.1000315

Copyright: © 2016 Friez, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



The purpose of this study was to determine if exertion influences the ONSD in healthy individuals. Healthy adults were eligible for inclusion. Activities were performed by each participant for 60 seconds and were as follows: sprinting, holding a 10-pound weight with both arms outstretched parallel to the floor, a Valsalva maneuver, a plank position, and positioning the head down thirty degrees with the participant in the supine position. Two-dimensional ultrasound images visualizing the optic nerve sheath (ONS) were recorded in three orientations and averaged to determine the mean ONSD 3 millimeters posterior to the retina. Baseline measurements ranged from 3.57 to 4.90 millimeters. Post-exertion measurements ranged from 3.60 to 4.93 millimeters. Based on a one sample paired t-test the difference between baseline and post-activity measurements were not significant. This study demonstrates that ONSD measurements by ultrasound do not change in healthy individuals in response to exertion.


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