Analysis of hand motion differentiates expert and novice surgeons

Munenori Uemura, Morimasa Tomikawa, Ryuichi Kumashiro, Tiejun Miao, Ryota Souzaki, Satoshi Ieiri, Kenoki Ohuchida, Alan T. Lefor, Makoto Hashizume

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Background The number of operations performed by a surgeon may be an indicator of surgical skill. The hand motions made by a surgeon also reflect skill and level of expertise. We hypothesized that the hand motions of expert and novice surgeons differ significantly, regardless of whether they are familiar with specific tasks during an operation. Methods This study compared 11 expert surgeons, each of whom had performed >100 laparoscopic procedures, and 27 young surgeons, each of whom had performed <15 laparoscopic procedures. Each examinee performed a specific skill assessment task, in which instrument motion was monitored using magnetic tracking system. We analyzed the paths of the centers of gravity of the tips of the needle holders and the relative paths of the tips using two mathematical methods of detrended fluctuation analysis and unstable periodic orbit analysis. Results Detrended fluctuation analysis showed that the exponent in the function describing the initial scaling exponent (α1) differed significantly for experts and novices, being close to 1.0 and 1.5, respectively (P < 0.01). This indicated that the expert group had a greater long-range coherence with an intrinsic sequence and smooth continuity among a series of motions. Likewise, unstable periodic orbit analysis showed that the second period of unstable orbit was significantly longer for experts in comparison with novices (P < 0.01). This demonstrates mathematically that the hands of experts are more stable when performing laparoscopic procedures. Conclusions Objective evaluation of hand motion during a simulated laparoscopic procedure showed a significant difference between experts and novices.

Original languageEnglish
Pages (from-to)8-13
Number of pages6
JournalJournal of Surgical Research
Volume188
Issue number1
DOIs
Publication statusPublished - May 1 2014

Fingerprint

Hand
Orbit
Gravitation
Needles
Surgeons

All Science Journal Classification (ASJC) codes

  • Surgery

Cite this

Uemura, M., Tomikawa, M., Kumashiro, R., Miao, T., Souzaki, R., Ieiri, S., ... Hashizume, M. (2014). Analysis of hand motion differentiates expert and novice surgeons. Journal of Surgical Research, 188(1), 8-13. https://doi.org/10.1016/j.jss.2013.12.009

Analysis of hand motion differentiates expert and novice surgeons. / Uemura, Munenori; Tomikawa, Morimasa; Kumashiro, Ryuichi; Miao, Tiejun; Souzaki, Ryota; Ieiri, Satoshi; Ohuchida, Kenoki; Lefor, Alan T.; Hashizume, Makoto.

In: Journal of Surgical Research, Vol. 188, No. 1, 01.05.2014, p. 8-13.

Research output: Contribution to journalArticle

Uemura, M, Tomikawa, M, Kumashiro, R, Miao, T, Souzaki, R, Ieiri, S, Ohuchida, K, Lefor, AT & Hashizume, M 2014, 'Analysis of hand motion differentiates expert and novice surgeons', Journal of Surgical Research, vol. 188, no. 1, pp. 8-13. https://doi.org/10.1016/j.jss.2013.12.009
Uemura M, Tomikawa M, Kumashiro R, Miao T, Souzaki R, Ieiri S et al. Analysis of hand motion differentiates expert and novice surgeons. Journal of Surgical Research. 2014 May 1;188(1):8-13. https://doi.org/10.1016/j.jss.2013.12.009
Uemura, Munenori ; Tomikawa, Morimasa ; Kumashiro, Ryuichi ; Miao, Tiejun ; Souzaki, Ryota ; Ieiri, Satoshi ; Ohuchida, Kenoki ; Lefor, Alan T. ; Hashizume, Makoto. / Analysis of hand motion differentiates expert and novice surgeons. In: Journal of Surgical Research. 2014 ; Vol. 188, No. 1. pp. 8-13.
@article{8210ab07b99942cebd8587a3833211e2,
title = "Analysis of hand motion differentiates expert and novice surgeons",
abstract = "Background The number of operations performed by a surgeon may be an indicator of surgical skill. The hand motions made by a surgeon also reflect skill and level of expertise. We hypothesized that the hand motions of expert and novice surgeons differ significantly, regardless of whether they are familiar with specific tasks during an operation. Methods This study compared 11 expert surgeons, each of whom had performed >100 laparoscopic procedures, and 27 young surgeons, each of whom had performed <15 laparoscopic procedures. Each examinee performed a specific skill assessment task, in which instrument motion was monitored using magnetic tracking system. We analyzed the paths of the centers of gravity of the tips of the needle holders and the relative paths of the tips using two mathematical methods of detrended fluctuation analysis and unstable periodic orbit analysis. Results Detrended fluctuation analysis showed that the exponent in the function describing the initial scaling exponent (α1) differed significantly for experts and novices, being close to 1.0 and 1.5, respectively (P < 0.01). This indicated that the expert group had a greater long-range coherence with an intrinsic sequence and smooth continuity among a series of motions. Likewise, unstable periodic orbit analysis showed that the second period of unstable orbit was significantly longer for experts in comparison with novices (P < 0.01). This demonstrates mathematically that the hands of experts are more stable when performing laparoscopic procedures. Conclusions Objective evaluation of hand motion during a simulated laparoscopic procedure showed a significant difference between experts and novices.",
author = "Munenori Uemura and Morimasa Tomikawa and Ryuichi Kumashiro and Tiejun Miao and Ryota Souzaki and Satoshi Ieiri and Kenoki Ohuchida and Lefor, {Alan T.} and Makoto Hashizume",
year = "2014",
month = "5",
day = "1",
doi = "10.1016/j.jss.2013.12.009",
language = "English",
volume = "188",
pages = "8--13",
journal = "Journal of Surgical Research",
issn = "0022-4804",
publisher = "Academic Press Inc.",
number = "1",

}

TY - JOUR

T1 - Analysis of hand motion differentiates expert and novice surgeons

AU - Uemura, Munenori

AU - Tomikawa, Morimasa

AU - Kumashiro, Ryuichi

AU - Miao, Tiejun

AU - Souzaki, Ryota

AU - Ieiri, Satoshi

AU - Ohuchida, Kenoki

AU - Lefor, Alan T.

AU - Hashizume, Makoto

PY - 2014/5/1

Y1 - 2014/5/1

N2 - Background The number of operations performed by a surgeon may be an indicator of surgical skill. The hand motions made by a surgeon also reflect skill and level of expertise. We hypothesized that the hand motions of expert and novice surgeons differ significantly, regardless of whether they are familiar with specific tasks during an operation. Methods This study compared 11 expert surgeons, each of whom had performed >100 laparoscopic procedures, and 27 young surgeons, each of whom had performed <15 laparoscopic procedures. Each examinee performed a specific skill assessment task, in which instrument motion was monitored using magnetic tracking system. We analyzed the paths of the centers of gravity of the tips of the needle holders and the relative paths of the tips using two mathematical methods of detrended fluctuation analysis and unstable periodic orbit analysis. Results Detrended fluctuation analysis showed that the exponent in the function describing the initial scaling exponent (α1) differed significantly for experts and novices, being close to 1.0 and 1.5, respectively (P < 0.01). This indicated that the expert group had a greater long-range coherence with an intrinsic sequence and smooth continuity among a series of motions. Likewise, unstable periodic orbit analysis showed that the second period of unstable orbit was significantly longer for experts in comparison with novices (P < 0.01). This demonstrates mathematically that the hands of experts are more stable when performing laparoscopic procedures. Conclusions Objective evaluation of hand motion during a simulated laparoscopic procedure showed a significant difference between experts and novices.

AB - Background The number of operations performed by a surgeon may be an indicator of surgical skill. The hand motions made by a surgeon also reflect skill and level of expertise. We hypothesized that the hand motions of expert and novice surgeons differ significantly, regardless of whether they are familiar with specific tasks during an operation. Methods This study compared 11 expert surgeons, each of whom had performed >100 laparoscopic procedures, and 27 young surgeons, each of whom had performed <15 laparoscopic procedures. Each examinee performed a specific skill assessment task, in which instrument motion was monitored using magnetic tracking system. We analyzed the paths of the centers of gravity of the tips of the needle holders and the relative paths of the tips using two mathematical methods of detrended fluctuation analysis and unstable periodic orbit analysis. Results Detrended fluctuation analysis showed that the exponent in the function describing the initial scaling exponent (α1) differed significantly for experts and novices, being close to 1.0 and 1.5, respectively (P < 0.01). This indicated that the expert group had a greater long-range coherence with an intrinsic sequence and smooth continuity among a series of motions. Likewise, unstable periodic orbit analysis showed that the second period of unstable orbit was significantly longer for experts in comparison with novices (P < 0.01). This demonstrates mathematically that the hands of experts are more stable when performing laparoscopic procedures. Conclusions Objective evaluation of hand motion during a simulated laparoscopic procedure showed a significant difference between experts and novices.

UR - http://www.scopus.com/inward/record.url?scp=84897384017&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84897384017&partnerID=8YFLogxK

U2 - 10.1016/j.jss.2013.12.009

DO - 10.1016/j.jss.2013.12.009

M3 - Article

C2 - 24418518

AN - SCOPUS:84897384017

VL - 188

SP - 8

EP - 13

JO - Journal of Surgical Research

JF - Journal of Surgical Research

SN - 0022-4804

IS - 1

ER -