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The musculoskeletal loading profile of the thumb during pipetting based on tendon displacement.

Authors
Wu-JZ; Sinsel-EW; Shroyer-JF; Welcome-DE; Zhao-KD; An-K-N; Buczek-FL
Source
Med Eng Phys 2013 Dec; 35(12):1801-1810
NIOSHTIC No.
20043174
Abstract
Strong evidence indicates that highly repetitive manual work is associated with the development of upper extremity musculoskeletal disorders (MSDs). One of the occupational activities that involves highly repetitive and forceful hand work is manual pipetting in chemical or biological laboratories. In the current study, we quantified tendon displacement as a parameter to assess the cumulative loading exposure of the musculoskeletal system in the thumb during pipetting. The maximal tendon displacement was found in the flexor pollicis longus (FPL) tendon. Assuming that subjects' pipetting rates were maintained constant during a period of 1 h, the average accumulated tendon displacement in the FPL reached 29 m, which is in the lower range of those observed in other occupational activities, such as typing and nail gun operations. Our results showed that tendon displacement data contain relatively small standard deviations, despite high variances in thumb kinematics, suggesting that the tendon displacements may be useful in evaluating the musculoskeletal loading profile.
Keywords
Repetitive-work; Musculoskeletal-system; Musculoskeletal-system-disorders; Physiological-function; Physiological-effects; Hand-injuries; Manual-materials-handling; Laboratory-work; Exposure-levels; Risk-factors; Author Keywords: Thumb; Muscle-tendon force; Pipette; Modeling; Inverse dynamics
Contact
J. Z. Wu, NIOSH/CDC, 1095 Willowdale Road, MS-2027, Morgantown, WV 26505, USA
CODEN
MEPHEO
Publication Date
20131201
Document Type
Journal Article
Email Address
jwu@cdc.gov
Fiscal Year
2014
NTIS Accession No.
NTIS Price
Identifying No.
M102013
Issue of Publication
12
ISSN
1350-4533
NIOSH Division
HELD
Priority Area
Construction; Manufacturing
Source Name
Medical Engineering & Physics
State
WV; MN
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