alexa Effect of Visual Display Location on Human Performance

Journal of Ergonomics
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Research Article

Effect of Visual Display Location on Human Performance in Simulated Laparoscopic Tasks

Hernandez R1, Travascio F1, Onar-Thomas A2 and Asfour S1*

1Industrial Engineering Department, 1251 Memorial Drive, McArthur Engineering Building, University of Miami, Coral Gables, FL 33124, USA

2St. Jude Children’s Research Hospital Department of Biostatistics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Mail Stop 768, Memphis, TN 38105, USA

*Corresponding Author:
Shihab Asfour
College of Engineering, University of Miami
1251 Memorial Drive, MEB 268
Coral Gables, FL 33124-0621, USA
Tel: +1-(305)-284-2367
Fax: +1-(305)-284-4040
E-mail: [email protected]

Received Date: November 26, 2014; Accepted Date: December 18, 2014; Published Date: December 26, 2014

Citation: Hernandez R, Travascio F, Onar-Thomas A, Asfour S (2014) Effect of Visual Display Location on Human Performance in Simulated Laparoscopic Tasks. J Ergonomics 4:134. doi: 10.4172/2165-7556.1000134

Copyright: © 2014 Hernandez R, 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.



Laparoscopy is a minimally invasive surgery practiced through small incisions in the body, and requiring the use of long-reach instruments and a camera. Since the video feed is displayed on a monitor, depth perception can be significantly altered, and it is hypothesized that such alterations may depend on the relative position of the monitor with respect to the operator. The objective of this study was to explore the relationship between monitor positioning and human performance in laparoscopic tasks.

A total of eight male subjects volunteered to perform a variety of simulated laparoscopic tasks including object transfers, precision cutting, and suturing while three different monitor configurations were used (i.e., left, center, and right of the user). Tool trajectory was monitored using a motion capturing system, and task performance was evaluated using human performance quantitative metrics including completion time, depth of penetration, path length, axial speed, and motion smoothness. Results showed that human performance significantly increased when monitor location was centered with respect to the user during precision cutting. Moreover, subjects’ performance decreased when the monitor was placed on their dominant-hand side. The findings of this study suggest ergonomic guidelines for optimizing human performance in simulated and actual laparoscopic tasks. Specifically, placing the monitor in a central position with respect to the user should represent the standard configuration while conducting laparoscopy.


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