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Related Concept Videos

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and...
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Related Experiment Video

Updated: May 3, 2026

Roux-en-Y Gastric Bypass Operation in Rats
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Objective performance indicators during robotic Roux-en-Y gastric bypass distinguish experienced from trainee

Wendy S Li1,2, Qais AbuHasan3, Dimitrios I Athanasiadis3

  • 1Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, USA. lishiw@iu.edu.

Surgical Endoscopy
|July 14, 2025
PubMed
Summary

Objective performance indicators (OPIs) in robotic surgery can differentiate experienced surgeons from trainees during Roux-en-Y gastric bypass. These metrics offer potential for objective surgical skill assessment and training.

Keywords:
Bariatric surgeryKinematicsObjective performance indicatorsResident trainingRobotic surgeryRoux-en-Y gastric bypass

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Area of Science:

  • Robotic Surgery
  • Surgical Education
  • Bariatric Surgery

Background:

  • Objective performance indicators (OPIs) in robotic surgery correlate with surgeon experience and patient outcomes.
  • Evaluation of OPIs in bariatric surgery, specifically robotic Roux-en-Y gastric bypass (r-RYGB), is limited.

Purpose of the Study:

  • To determine if OPIs can effectively differentiate experienced surgeons from trainees during r-RYGB.
  • To explore the utility of OPIs in assessing surgical skill in bariatric procedures.

Main Methods:

  • Kinematic and event data were collected from 31 r-RYGB procedures (2 attending surgeons, 6 trainees) using the da Vinci Surgical System.
  • Data included console active time, instrument movement speed, bimanual dexterity, and workspace volume rate.
  • Videos were annotated across eight surgical steps for OPI generation and analysis.

Main Results:

  • Significant OPI differences between experienced and trainee surgeons were observed in 3 of 8 procedural steps.
  • Experienced surgeons showed greater bimanual dexterity and varied instrument speed during dissection and gastric pouch creation.
  • Trainees exhibited lower console active time during specific steps like gastric pouch creation and hand-sewn anastomosis.

Conclusions:

  • Step-specific OPIs effectively distinguish experienced surgeons from trainees in robotic surgery.
  • Further validation of OPIs could enable objective assessment of trainee performance.
  • OPIs may inform surgical training progression and decisions regarding surgeon autonomy.