Ergonomic Analysis of Muscle Activity in the Forearm and Back Muscles During Laparoscopic Surgery

2013 ◽  
Vol 23 (2) ◽  
pp. 203-207 ◽  
Author(s):  
Francisco J. Pérez-Duarte ◽  
Francisco M. Sánchez-Margallo ◽  
Idoia Díaz-Güemes Martín-Portugués ◽  
Miguel A. Sánchez-Hurtado ◽  
Marcos Lucas-Hernández ◽  
...  
Keyword(s):  
Laparoscopic Surgery ◽  
Muscle Activity ◽  
Back Muscles ◽  
Ergonomic Analysis

Ergonomic Analysis of Materials Handling and Design Guidelines for a New Central Public Library

1992 ◽  
Vol 36 (15) ◽  
pp. 1148-1152 ◽  
Author(s):  
Judy Village ◽  
Brian Campbell ◽  
John Cull
Keyword(s):  
Muscle Activity ◽  
Public Library ◽  
Design Guidelines ◽  
Central Research ◽  
Research Committee ◽  
Library Management ◽  
Materials Handling ◽  
New Methods ◽  
Workplace Factors ◽  
Ergonomic Analysis

In the first phase of this two-year project, workplace factors contributing to hand, arm and back injuries among employees at a large central public library were identified and prioritized. A central research committee was established consisting of Library Management, Union representatives and an Ergonomist. The next phase involved formation of four sub-committees to procure and prototype new equipment, develop new methods of working, evaluate the new equipment and methods, and make recommendations to the central research committee. The Ergonomist facilitated the process by helping committees remain systematic and objective in their approach and evaluations. In some cases more detailed analyses were conducted using computerized lifting models and electromyographic (EMG) analysis of muscle activity. Efforts resulted in recommendations for the current library facility and conceptual design guidelines for architects planning the new Central Public Library.

Electromyographic Evaluation of Operation of a Railroad Hand Brake

1981 ◽  
Vol 25 (1) ◽  
pp. 83-87
Author(s):  
Susan D. Vasko ◽  
Thomas H. Rockwell ◽  
Robert J. Weber
Keyword(s):  
Muscle Activity ◽  
Work Design ◽  
Upright Posture ◽  
Back Muscle ◽  
Back Muscles ◽  
Design Strength ◽  
Strength Data ◽  
Major Predictor ◽  
Braking Force ◽  
Male Subjects

Ten male subjects performed four methods of setting a vertical boxcar hand brake. Muscle activity was recorded in arm, leg, and back muscles. Each method was rated in terms of adherence to principles of work design and rated by subjects in order of comfort. Maximum braking force was recorded for each method and the subjects were videotaped to analyze postures. Biographical and strength data were recorded. The study found that as equipment arrangements allowed the operator to assume a more upright posture, braking force tended to increase, comfort ratings improved, EMG signals tended to decrease, and the task adhered to more principles of physiologically sound work design. Strength of the left arm was the major predictor of braking force, and back muscle activity tended to increase as braking force increased.

scholarly journals Is active sitting on a dynamic office chair controlled by the trunk muscles?

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0242854
Author(s):  
Roman Peter Kuster ◽  
Christoph Michael Bauer ◽  
Daniel Baumgartner
Keyword(s):  
Muscle Activity ◽  
Muscle Activation ◽  
Positive Impact ◽  
Muscular Activity ◽  
Trunk Muscles ◽  
Thigh Muscle ◽  
Dominant Factor ◽  
Back Muscles ◽  
Temporal Muscle ◽  
Office Chair

Today’s office chairs are not known to promote active sitting or to activate the lumbar trunk muscles, both of which functions are ergonomically recommended. This study investigated a newly developed dynamic office chair with a moveable seat, specifically designed to promote trunk muscle controlled active sitting. The study aimed to determine the means by which the seat movement was controlled during active sitting. This was accomplished by quantifying trunk and thigh muscular activity and body kinematics. Additionally, the effect of increased spinal motion on muscular activity and body kinematics was analysed. Ten subjects were equipped with reflective body markers and surface electromyography on three lumbar back muscles (multifidus, iliocostalis, longissimus) and two thigh muscles (vastus lateralis and medialis). Subjects performed a reading task during static and active sitting in spontaneous and maximum ranges of motion in a simulated office laboratory setting. The temporal muscle activation pattern, average muscle activity and body segment kinematics were analysed and compared using Friedman and post-hoc Wilcoxon tests (p≤0.05). Active sitting on the new chair significantly affected the lumbar trunk muscles, with characteristic cyclic unloading/loading in response to the seat movement. Neither thigh muscle activity nor lateral body weight shift were substantially affected by active sitting. When participants increased their range of motion, the lumbar back muscles were activated for longer and relaxation times were shorter. The characteristic activity pattern of the lumbar trunk muscles was shown to be the most likely dominant factor in controlling seat movement during active sitting. Consequently, the new chair may have a potential positive impact on back health during prolonged sitting. Further studies are necessary to analyse the frequency and intensity of active sitting during daily office work.

Design and Evaluation of a Portable Laparoscopic Training System Using Virtual Reality

2016 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohsen Zahiri ◽  
Ryan Booton ◽  
Ka-Chun Siu ◽  
Carl A. Nelson
Keyword(s):  
Image Processing ◽  
Virtual Reality ◽  
Laparoscopic Surgery ◽  
Muscle Activity ◽  
Completion Time ◽  
Training System ◽  
Surgical Instruments ◽  
Task Completion ◽  
P Value ◽  
Training Time

The ubiquitous nature of laparoscopic surgery and the decreased training time available for surgeons are driving an increased need for effective training systems to help surgeons learn different procedures. A cost-effective and user-friendly simulator has been designed to imitate specific training tasks for laparoscopic surgery in virtual environments via image processing and computer vision. The capability of using various actual surgical instruments suited for these specific procedures gives heightened fidelity to the simulator. Image processing via matlab software provides real-time mapping of the graspers in the workspace to the virtual reality (VR) environment (vizard software). Two different tasks (peg transfer and needle passing) were designed to evaluate trainees and compare their performance with characteristics of expert surgeons. Pilot testing of the system was carried out with 11 subjects to validate the similarity of this device with an existing surgical box trainer. Task completion time and muscle activity have been used as metrics for evaluation. The decrease in completion time for all subjects suggests similarity of skills transfer for both simulators. In addition, the p-value of muscle activity showed no significant differences for most muscles in the peg transfer task when using either the VR or physical analog environment and no significant differences for about half of the muscles in the needle passing task. Based on the results, the new proposed VR simulator appears to be a viable alternative to help trainees gain laparoscopic skills.

Ergonomic Analysis of Muscle Activity during Laparoscopy and Influence of Training

2020 ◽  
Vol 231 (4) ◽  
pp. e49
Author(s):  
Washim Firoz Khan ◽  
Virinder Kumar Bansal ◽  
Krishna Asuri ◽  
Om Prakash
Keyword(s):  
Muscle Activity ◽  
Ergonomic Analysis

Using infrared imaging for assessment of muscular activity in the forearm of surgeons in the performance of laparoscopic tasks

2019 ◽  
Vol 233 (10) ◽  
pp. 999-1009 ◽  
Author(s):  
Ramon Sancibrian ◽  
Maria C Gutierrez-Diez ◽  
Carlos Redondo-Figuero ◽  
Jose R Llata ◽  
Jose C Manuel-Palazuelos
Keyword(s):  
Laparoscopic Surgery ◽  
Working Conditions ◽  
Muscle Activity ◽  
Infrared Imaging ◽  
Muscular Activity ◽  
Remote Measurement ◽  
Delayed Response ◽  
Area Of Interest ◽  
Best Value ◽  
Two Stages

Surgeons working in laparoscopic surgery are subjected to hard working conditions because of the poor ergonomic characteristics of the workplace. The improvement in the working conditions requires the use of reliable techniques for the assessment of muscular activity. In this article infrared imaging is used and compared with electromyography for the evaluation of muscle activity in the performance of laparoscopic surgical tasks. Electromyography has been widely used for the evaluation of the electrical activity produced by the muscles in the performance of surgery. On the contrary, infrared imaging is an innovative technique that has not been sufficiently explored. An experimental evaluation was carried out using a thermography camera and recording the infrared images from volunteers in different tests. Pearson’s correlation was obtained between the electromyography and thermographic measurements in two stages: Endurance Stage (best value: ρ = 0.8401 with p < 0.01) and Surgical Task (best value: ρ  = 0.8309 with p < 0.01). The article demonstrates that infrared imaging is a valuable technique for the evaluation of muscle activity in laparoscopic surgery, and it can be compared with electromyography. The main advantages of infrared imaging are that it allows remote measurement and provides activity information in the whole area of interest. However, drawbacks such as delayed response of the infrared imaging due to thermal conductivity of the skin should be considered. Electromyography only provides information in the location of the electrodes, but it is a real-time response. For these reasons, the techniques complement each other.

Effects of trunk extension exercises using ATM2 on the muscle activity of low back muscles in healthy subjects

Physiotherapy ◽  
2015 ◽  
Vol 101 ◽  
pp. e1698-e1699
Author(s):  
S. Yokoyama ◽  
S. Murata ◽  
M. Nejishima ◽  
S. Numasawa
Keyword(s):  
Muscle Activity ◽  
Healthy Subjects ◽  
Low Back ◽  
Back Muscles ◽  
Trunk Extension

Surface Electromyography-Assisted Ergonomic Analysis in a Newspaper Printing Plant: A Case Study

Biofeedback ◽  
2010 ◽  
Vol 38 (4) ◽  
pp. 155-157
Author(s):  
Thomas R Caffrey ◽  
Robert Clasby
Keyword(s):  
Work Environment ◽  
Muscle Activity ◽  
Surface Electromyography ◽  
Muscle Function ◽  
Muscle Dysfunction ◽  
Job Tasks ◽  
Ergonomic Analysis ◽  
Injury Potential ◽  
Ergonomic Evaluation

Abstract This case study reports on the use of surface electromyography (SEMG) evaluation in a work environment, including production, to show a relationship between muscle dysfunction and specific job tasks and their injury potential. The results show that SEMG can help identify discordant muscle activity as part of an ergonomic evaluation. Such an evaluation leads to improvement in muscle function through SEMG-guided worker/workplace retraining.

scholarly journals Assessment of muscle activity and fatigue during laparoscopic surgery

2022 ◽  
Author(s):  
Tegan Thurston ◽  
James P. Dolan ◽  
Farah Husein ◽  
Andrea Stroud ◽  
Kenneth Funk ◽  
...  
Keyword(s):  
Laparoscopic Surgery ◽  
Muscle Activity
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