Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2018 Jul 11:2018:7816160.
doi: 10.1155/2018/7816160. eCollection 2018.

The Dimensionless Squared Jerk: An Objective Parameter That Improves Assessment of Hand Motion Analysis during Simulated Shoulder Arthroscopy

Erica Kholinne  1   2 , Maulik J Gandhi  3 , Arnold Adikrishna  2 , Hanpyo Hong  2 , Haewon Kim  2 , Jaesung Hong  4 , In-Ho Jeon  2
Affiliations

The Dimensionless Squared Jerk: An Objective Parameter That Improves Assessment of Hand Motion Analysis during Simulated Shoulder Arthroscopy

Erica Kholinne et al. Biomed Res Int. .

Abstract

Purpose: Attempts to quantify hand movements of surgeons during arthroscopic surgery faced limited progress beyond motion analysis of hands and/or instruments. Surrogate markers such as procedure time have been used. The dimensionless squared jerk (DSJ) is a measure of deliberate hand movements. This study tests the ability of DSJ to differentiate novice and expert surgeons (construct validity) whilst performing simulated arthroscopic shoulder surgical tasks.

Methods: Six residents (novice group) and six consultants (expert group) participated in this study. Participants performed three validated tasks sequentially under the same experimental setup (one performance). Each participant had ten performances assessed. Hand movements were recorded with optical tracking system. The DSJ, time taken, total path length, multiple measures of acceleration, and number of movements were recorded.

Results: There were significant differences between novices and experts when assessed using time, number of movements with average and minimal acceleration threshold, and DSJ. No significant differences were observed in maximum acceleration, total path length, and number of movements with 10m/s2 acceleration threshold.

Conclusion: DSJ is an objective parameter that can differentiate novice and expert surgeons' simulated arthroscopic performances. We propose DSJ as an adjunct to more conventional parameters for arthroscopic surgery skills assessment.

PubMed Disclaimer

Figures

Figure 1
Figure 1
Experimental setup. (a) Standardized preparation tool (red dash lines). (b) Motion capture system configuration. Yellow dots are reflective markers. Blue outlined prisms are optical cameras.
Figure 2
Figure 2
Modified human phantom shoulder model. Red-dots circle is a predesigned suture anchor site and red arrows are five predetermined points along the lateral border of rotator cuff.
Figure 3
Figure 3
Whisker plots for (a) time, (b) dimensionless squared jerk, (c) number of movements (minimum acceleration), and (d) number of movements (average acceleration).
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Hodgins J. L., Veillette C. Arthroscopic proficiency: methods in evaluating competency. BMC Medical Education. 2013;13(1) doi: 10.1186/1472-6920-13-61. - DOI - PMC - PubMed
    1. Darzi A., Smith S., Taffinder N. Assessing operative skill. Needs to become more objective. BMJ. 1999;318(7188):887–888. doi: 10.1136/bmj.318.7188.887. - DOI - PMC - PubMed
    1. Milburn J. A., Khera G., Hornby S. T., Malone P. S., Fitzgerald J. E. Introduction, availability and role of simulation in surgical education and training: review of current evidence and recommendations from the Association of Surgeons in Training. International Journal of Surgery. 2012;10(8):393–398. doi: 10.1016/j.ijsu.2012.05.005. - DOI - PubMed
    1. Hogan N., Sternad D. Sensitivity of Smoothness Measures to Movement Duration, Amplitude, and Arrests. Journal of Motor Behavior. 2009;41(6):529–534. doi: 10.3200/35-09-004-RC. - DOI - PMC - PubMed
    1. Mabrey J. D., Gillogly S. D., Kasser J. R., et al. Virtual reality simulation of arthroscopy of the knee. Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association. 2002;18(6):p. E28. doi: 10.1016/S0749-8063(07)60034-6. - DOI - PubMed

LinkOut - more resources