Relevance of motion-related assessment metrics in laparoscopic surgery

Oropesa García, Ignacio and Chmarra, Magdalena K. and Sánchez González, Patricia and Lamata de la Orden, Pablo and Rodrigues, Sharon P. and Enciso Sanz, S. and Sánchez Margallo, Francisco Miguel and Jansen, F.W. and Dankelman, J. and Gómez Aguilera, Enrique J. (2012). Relevance of motion-related assessment metrics in laparoscopic surgery. "Surgical Innovation" (n. 13); pp. 1-14. ISSN 1553-3514.


Title: Relevance of motion-related assessment metrics in laparoscopic surgery
  • Oropesa García, Ignacio
  • Chmarra, Magdalena K.
  • Sánchez González, Patricia
  • Lamata de la Orden, Pablo
  • Rodrigues, Sharon P.
  • Enciso Sanz, S.
  • Sánchez Margallo, Francisco Miguel
  • Jansen, F.W.
  • Dankelman, J.
  • Gómez Aguilera, Enrique J.
Item Type: Article
Título de Revista/Publicación: Surgical Innovation
Date: September 2012
ISSN: 1553-3514
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Tecnología Fotónica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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INTRODUCTION: Motion metrics have become an important source of information when addressing the assessment of surgical expertise. However, their direct relationship with the different surgical skills has not been fully explored. The purpose of this study is to investigate the relevance of motion-related metrics in the evaluation processes of basic psychomotor laparoscopic skills, as well as their correlation with the different abilities sought to measure. METHODS: A framework for task definition and metric analysis is proposed. An explorative survey was first conducted with a board of experts to identify metrics to assess basic psychomotor skills. Based on the output of that survey, three novel tasks for surgical assessment were designed. Face and construct validation study was performed, with focus on motion-related metrics. Tasks were performed by 42 participants (16 novices, 22 residents and 4 experts). Movements of the laparoscopic instruments were registered with the TrEndo tracking system and analyzed. RESULTS: Time, path length and depth showed construct validity for all three tasks. Motion smoothness and idle time also showed validity for tasks involving bi-manual coordination and tasks requiring a more tactical approach respectively. Additionally, motion smoothness and average speed showed a high internal consistency, proving them to be the most task-independent of all the metrics analyzed. CONCLUSION: Motion metrics are complementary and valid for assessing basic psychomotor skills, and their relevance depends on the skill being evaluated. A larger clinical implementation, combined with quality performance information, will give more insight on the relevance of the results shown in this study.

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Item ID: 15297
DC Identifier:
OAI Identifier:
DOI: 10.1177/1553350612459808
Official URL:
Deposited by: Memoria Investigacion
Deposited on: 04 Jun 2013 18:56
Last Modified: 21 Apr 2016 15:21
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