Bilateral upper limb surface electromyography analysis during single-operator colonoscopy: Implications for ergonomics and occupational health

doi:10.4253/wjge.v18.i3.116646

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World Journal of Gastrointestinal Endoscopy

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1948-5190

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Baishideng Publishing Group Inc, 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA

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Copyright: ©Author(s) 2026. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial (CC BY-NC 4.0) license. No commercial re-use. See permissions. Published by Baishideng Publishing Group Inc.

World J Gastrointest Endosc. Mar 16, 2026; 18(3): 116646
Published online Mar 16, 2026. doi: 10.4253/wjge.v18.i3.116646

Table 4 Specificity of complex loop during single person colonoscopy insertion

Loop type	Time (seconds)	MID DELT. R MPF slope (%)	FLEX.CARP.R. L MPF slope (%)	FLEX.CARP.R. R MPF slope (%)	EXT.DIG. L RMS (μV)	EXT.DIG. R MPF slope (%)
No loop	53.6	15.9	25.7	12.2	225.1	22.4
“γ” loop	68.6	2.6	10.1	12.5	228.5	13.4
“α” loop	112.0	21.3	33.0	15.9	289.1	19.6
Reverse “α” loop	81.9	31.4	35.7	10.4	316.3	37.0
“N” loop	80.1	15.0	7.3	24.4	347.2	27.0
Complex loop	87.6	38.4	36.1	26.5	370.6	31.8

MID DELT. R: Right middle deltoid; MPF: Median power frequency; FLEX.CARP.R. L: Left flexor carpi radialis; FLEX.CARP.R. R: Right flexor carpi radialis; EXT.DIG. L: Left extensor digitorum; RMS: Root mean square; EXT.DIG. R: Right extensor digitorum.

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Citation: Wang RG, Wang YQ, Cao H. Bilateral upper limb surface electromyography analysis during single-operator colonoscopy: Implications for ergonomics and occupational health. World J Gastrointest Endosc 2026; 18(3): 116646
URL: https://www.wjgnet.com/1948-5190/full/v18/i3/116646.htm
DOI: https://dx.doi.org/10.4253/wjge.v18.i3.116646

Wang RG, Wang YQ, Cao H. Bilateral upper limb surface electromyography analysis during single-operator colonoscopy: Implications for ergonomics and occupational health. World J Gastrointest Endosc 2026; 18(3): 116646 [DOI: 10.4253/wjge.v18.i3.116646]

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