Axial-spin Technique of Endoscopic Intracorporeal Knot Tying: Comparison With the Conventional Technique and Objective Assessment of Knot Security, Learning Curves, and Performance Efficiency Across Training Levels

Objectives. In our study we are aiming to analyse the learning curves in our surgical trainees by using two standard methods of intracorporeal knot tying.Material and Method. Two randomized groups of trainees are trained with two different intracorporeal knot tying techniques (loop and winding) by single surgeon for eight sessions. In each session participants were allowed to make as many numbers of knots in thirty minutes. The duration for each set of knots and the number of knots for each session were calculated. At the end each session, participants were asked about their frustration level, difficulty in making knot, and dexterity.Results. In winding method the number of knots tied was increasing significantly in each session with less frustration and less difficulty level.Discussion. The suturing and knotting skill improved in every session in both groups. But group B (winding method) trainees made significantly higher number of knots and they took less time for each set of knots than group A (loop method). Although both knotting methods are standard methods, the learning curve is better in loop method.Conclusion. The winding method of knotting is simpler and easier to perform, especially for the surgeons who have limited laparoscopic experience.

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Corrigendum to “A Comparative Study in Learning Curves of Two Different Intracorporeal Knot Tying Techniques”

Minimally Invasive Surgery ◽

10.1155/2018/7646831 ◽

2018 ◽

Vol 2018 ◽

pp. 1-1

Author(s):

Manuneethimaran Thiyagarajan ◽

Chandru Ravindrakumar

Keyword(s):

Comparative Study ◽

Learning Curves ◽

Knot Tying ◽

Intracorporeal Knot Tying

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Developing an Objective Structured Assessment of Technical Skills for Laparoscopic Suturing and Intracorporeal Knot Tying

Journal of Surgical Education ◽

10.1016/j.jsurg.2015.10.006 ◽

2016 ◽

Vol 73 (2) ◽

pp. 258-263 ◽

Cited By ~ 25

Author(s):

Olivia H. Chang ◽

Louise P. King ◽

Anna M. Modest ◽

Hye-Chun Hur

Keyword(s):

Technical Skills ◽

Knot Tying ◽

Laparoscopic Suturing ◽

Intracorporeal Knot Tying

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Comparison of different efficiency criteria for hydrological model assessment

Advances in Geosciences ◽

10.5194/adgeo-5-89-2005 ◽

2005 ◽

Vol 5 ◽

pp. 89-97 ◽

Cited By ~ 1307

Author(s):

P. Krause ◽

D. P. Boyle ◽

F. Bäse

Keyword(s):

Hydrological Model ◽

Objective Assessment ◽

Hydrologic Model ◽

Coefficient Of Determination ◽

Evaluation Procedure ◽

Efficiency Coefficient ◽

Model Assessment ◽

Different Types ◽

Index Of Agreement ◽

And Performance

Abstract. The evaluation of hydrologic model behaviour and performance is commonly made and reported through comparisons of simulated and observed variables. Frequently, comparisons are made between simulated and measured streamflow at the catchment outlet. In distributed hydrological modelling approaches, additional comparisons of simulated and observed measurements for multi-response validation may be integrated into the evaluation procedure to assess overall modelling performance. In both approaches, single and multi-response, efficiency criteria are commonly used by hydrologists to provide an objective assessment of the "closeness" of the simulated behaviour to the observed measurements. While there are a few efficiency criteria such as the Nash-Sutcliffe efficiency, coefficient of determination, and index of agreement that are frequently used in hydrologic modeling studies and reported in the literature, there are a large number of other efficiency criteria to choose from. The selection and use of specific efficiency criteria and the interpretation of the results can be a challenge for even the most experienced hydrologist since each criterion may place different emphasis on different types of simulated and observed behaviours. In this paper, the utility of several efficiency criteria is investigated in three examples using a simple observed streamflow hydrograph.

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