Construct validity of an objective assessment method for laparoscopic intracorporeal suturing and knot tying

  • Van Sickle K
  • Baghai M
  • Huang I
 et al. 
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Background: The ideal objective assessment method for laparoscopic technical skills is difficult to achieve in the operating room. Recent "VR2OR" studies have used a blinded, 2-reviewer error-based video tape analysis for intraoperative performance assessment. This study examines the validity of this methodology applied to laparoscopic intracorporeal suturing and knot tying. Methods: Four groups of subjects-experts (EX), surgery residents trained to expert criterion levels using simulation (TR), surgery residents receiving no supplemental training (NR), and medical students receiving simulation-based training (MS)-performed the fundal suturing portion of a laparoscopic Nissen fundoplication and were video-recorded for analysis. Two separate groups of surgeon reviewers (K.V.S. + M.B.; I.-P.H. + A.G.) were trained to evaluate laparoscopic suturing and knot tying performance using specific metrics. Subjects' operative performance was assessed by reviewers blinded to their training status and scored using an error-based, step specific scoring system to an inter-rater agreement of 80% or greater. Three primary performance measures were assessed: time, errors, and needle manipulations and comparisons between groups were made using a 1-way analysis of variance (ANOVA) with post-test. Results: A total of 40 fundal sutures (10 in each group) were scored by 2 separate rater groups with inter-rater agreement consistently greater than 80%. Inter-rater agreement was highest with the EX group (91%, range 76%-100%) and lowest with the NR group (85%, range 81%-98%). On average, the EX group significantly outperformed the other groups with regards to time (P

Author-supplied keywords

  • Intracorporeal knot tying
  • Laparoscopic suturing
  • Objective assessment
  • Validation

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