Obesity Surgery

, Volume 23, Issue 5, pp 589–593 | Cite as

A Cadaveric Porcine Model for Assessment in Laparoscopic Bariatric Surgery—a Validation Study

  • Camilo Boza
  • Julian Varas
  • Erwin Buckel
  • Pablo Achurra
  • Nicolás Devaud
  • Trystan Lewis
  • Rajesh Aggarwal
Original Contributions



Laparoscopic Roux-en-Y gastric bypass (LRYGBP) is the most effective surgical therapy for morbid obesity. It is an advanced laparoscopic surgical procedure and has a protracted learning curve. Therefore, it is important to develop innovative ways of training and assessing surgeons. The aim of this study is to determine if a cadaveric porcine jejuno-jejunostomy model is an accurate way of assessing a surgeon's technical skills by determining if a correlation exists with how he performs in the operating room.


Eight surgeons of varying experience performed a side-to-side stapled jejuno-jejunostomy on a cadaveric bench model before proceeding to perform the procedure on a real patient scheduled for LRYGBP. Performance was assessed using a motion tracking device, the Imperial College Surgical Assessment Device. Each procedure was recorded in video and scored by two blinded expert surgeons using procedure-specific rating scales.


The cadaveric bench model demonstrated concurrent validity with significant correlations between performance on the cadaveric model and patient for dexterity measures. Left-hand path length, r = 0.857 (median, 27, 41.3; P = 0.007), right-hand path length, r = 0.810 (median, 31.5, 60; P = 0.015) and total number of movements, r = 0.743 (median, 422, 637; P = 0.035). This correlation in performance was also demonstrated in the video rating scales, r = 0.727 (median, 13.2, 14.8; P = 0.041). No correlation was found in operative time (median, 541, 742; P = 0.071).


This study demonstrates the concurrent validity of the cadaveric porcine model, showing similar performances in surgeons completing a jejuno-jejunostomy on the cadaveric model and the patient.


Simulation Gastric bypass Laparoscopy Bariatric surgery Education Surgery Training/courses 



Rajesh Aggarwal is funded by a Clinician Scientist Award from the National Institute for Health Research, Department of Health, UK.

Conflict of Interest

The authors report no conflict of interest. The authors are responsible for the content and writing of the article.


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Camilo Boza
    • 1
  • Julian Varas
    • 1
  • Erwin Buckel
    • 1
  • Pablo Achurra
    • 1
  • Nicolás Devaud
    • 1
  • Trystan Lewis
    • 2
  • Rajesh Aggarwal
    • 2
  1. 1.Department of Digestive Surgery, Hospital ClinicoPontificia Universidad Católica de ChileSantiagoChile
  2. 2.Department of Biosurgery and Surgical TechnologyImperial College LondonLondonUK

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