Development of an ergonomic four-finger-push manual pipette design

Kim, Eun-Sik; Aqlan, Faisal; Freivalds, Andris

doi:10.1016/j.apergo.2020.103045

Cited by 5 publications

(1 citation statement)

References 38 publications

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“…The raw signal was recorded by EMG electrodes with a sampling frequency of 2 kHz. The maximum voluntary contraction (MVC) was obtained from each participant at the beginning of the experiment according to [48]. The muscle load was expressed as the ratio of the root mean square (RMS) amplitude recorded during the task completion to that obtained during MVC.…”

Section: Objective Surveymentioning

confidence: 99%

Ergonomic Design and Assessment of an Improved Handle for a Laparoscopic Dissector Based on 3D Anthropometry

Jiang

Wang

2023

IJERPH

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Laparoscopic surgery (LS) has been shown to provide great benefits to patients compared with open surgery. However, surgeons experience discomfort, low-efficiency, and even musculoskeletal disorders (MSDs) because of the poor ergonomic design of laparoscopic instruments. A methodology for the ergonomic design of laparoscopic dissector handles considering three-dimensional (3D) hand anthropometry and dynamic hand positions was addressed in this research. Two types of hand positions for grasping and stretching were scanned from 21 volunteers using a high-resolution 3D scanner. The 3D anthropometric data were extracted from these 3D hand pose models and used to design an improved handle (IH) that provides additional support for the thumb, a better fit to the purlicue, and a more flexible grasp for the index finger. Thirty subjects were invited to evaluate the IH in terms of muscular effort, goniometric study of motion, and efficiency and effectiveness during four trials of a laparoscopic training task. Questionnaires provided subjective parameters for ergonomic assessment. Positive results included less muscle load in the trapezius as well as significant but small angular differences in the upper limb. No significant reduction in the trial time and no increased percentage of the achievement were observed between the IH and the commercial handle (CH). Improved intuitiveness, comfort, precision, stability, and overall satisfaction were reported. IH provides significant ergonomic advantages in laparoscopic training tasks, demonstrating that the proposed methodology based on 3D anthropometry is a powerful tool for the handle design of laparoscopic dissectors and other surgical instruments.

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Section: Objective Surveymentioning

confidence: 99%