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International Journal of Computer Assisted Radiology and Surgery

Erschienen in:

01.12.2016 | Original Article

Construct validity of a video-tracking system based on orthogonal cameras approach for objective assessment of laparoscopic skills

verfasst von: Fernando Pérez-Escamirosa, Alberto Chousleb-Kalach, Maria del Carmen Hernández-Baro, Juan Alberto Sánchez-Margallo, Daniel Lorias-Espinoza, Arturo Minor-Martínez

Erschienen in: International Journal of Computer Assisted Radiology and Surgery | Ausgabe 12/2016

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Abstract

Purpose

This study was aimed to establish the construct validity of a video-tracking system based on orthogonal cameras approach for assessment of laparoscopic psychomotor skills in training environments.

Methods

The camera-tracking system consists of two webcams placed in orthogonal configuration at a distance of 13.5 cm. The orthogonal cameras employ a color segmentation algorithm to register the 3D motions of the laparoscopic instruments using colored tapes placed on the distal end. For construct validity, 31 participants (4 experts and 27 residents) performed three training tasks in a laparoscopic box trainer with the built-in orthogonal cameras system. Eleven motion-related parameters were used to evaluate their performance. Statistical analysis was performed, and results between two groups were compared using a Mann–Whitney U-test.

Results

Construct validity results showed statistical differences in almost all motion-related parameters for assessment of laparoscopic technical skills. Results demonstrated that the orthogonal video-based tracking system was able to differentiate laparoscopic experience between experts and trainees surgeons.

Conclusion

The orthogonal cameras system was successfully validated in a laparoscopic box trainer. This video-based tracking system was able to distinguish performance between experts and trainees surgeons, showing its potential as a reliable tool to assess laparoscopic psychomotor skills. The orthogonal cameras allow incorporating the advantages of this video motion-tracking technology with the benefits of the traditional laparoscopic box trainers, creating realistic haptic feedback and allowing the evaluation of psychomotor skills of the surgeons.

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Titel: Construct validity of a video-tracking system based on orthogonal cameras approach for objective assessment of laparoscopic skills
verfasst von: Fernando Pérez-Escamirosa
Alberto Chousleb-Kalach
Maria del Carmen Hernández-Baro
Juan Alberto Sánchez-Margallo
Daniel Lorias-Espinoza
Arturo Minor-Martínez
Publikationsdatum: 01.12.2016
Verlag: Springer Berlin Heidelberg
Erschienen in: International Journal of Computer Assisted Radiology and Surgery / Ausgabe 12/2016
Print ISSN: 1861-6410
Elektronische ISSN: 1861-6429
DOI: https://doi.org/10.1007/s11548-016-1388-1

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Abstract

Purpose

Methods

Results

Conclusion

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