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A Ne W Method to Estimate the Impact...

Al-lababidi, Suhaib.

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A Ne W Method to Estimate the Impact on the L5/Si Spinal Disc from Speed Lifting of Unstable Loads, Asymmetrically.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	A Ne W Method to Estimate the Impact on the L5/Si Spinal Disc from Speed Lifting of Unstable Loads, Asymmetrically./
作者:	Al-lababidi, Suhaib.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	100 p.
附註:	Source: Masters Abstracts International, Volume: 82-06.
Contained By:	Masters Abstracts International82-06.
標題:	Industrial engineering. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28208250
ISBN:	9798678167774

A Ne W Method to Estimate the Impact on the L5/Si Spinal Disc from Speed Lifting of Unstable Loads, Asymmetrically.
Al-lababidi, Suhaib.

A Ne W Method to Estimate the Impact on the L5/Si Spinal Disc from Speed Lifting of Unstable Loads, Asymmetrically. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 100 p.

Source: Masters Abstracts International, Volume: 82-06.

Thesis (M.Eng.)--The University of Texas at Arlington, 2020.

This item must not be sold to any third party vendors.

Background: The most significant causes of lower back injuries at work are probably from manual lifting activities. Lifting unstable loads pose a significant strain to the lower back and can cause debilitating lumbar spine injuries. The primary function of the vertebral column is to support the upper body. The L5/S1 disc junction located between the lumbar and the sacral regions of the vertebral column is the most critical joint in spine with respect to lifting strain. Because of its position and the amount of upper body weight it handles, it is particularly vulnerable to misalignment, wear and tear, and injury. Lifting loads has several adverse effects on the back: spinal compression and excessive strain on the back's tendons and ligaments may result in herniated or ruptured discs, disc degenerations, spinal stenosis, and other diseases. Biomechanical models have been developed to estimate the forces in the lumbar spine to determine the severity of lifting tasks, and NIOSH has developed an equation to determine a safe lifting load weight. However, neither covers all important types of lifting conditions adequately. The NIOSH equation does not include the lifting load type (stable versus unstable loads) as a variable due to insufficient research information, and the measurement of spinal force and body motion variables still need improvements to adequately measure and assess the severity of lifting unstable loads asymmetrically. Objective: The main objective of this study is to demonstrate a new method to measure compression, shear, and torque forces in L5/S1 disc when lifting unstable loads under different lifting conditions (load type, lifting style, and lifting speed). different lifting conditions (load type, lifting style, and lifting speed).Methods: A total of 3 subjects volunteered for this study to lift a bin, partly filled with water, with various lifting conditions while standing on force plates. Each subject lifted the bin (stable and unstable load) at two different speeds (normal and fast), and along two different planes of the body (sagittal and frontal) - a total of 8 lifting conditions. The water induced the required instability in the load during lifting. For simulating stable loads (of the same weight - 30 lb) solids replaced water in the same bin. Body joint angles, velocities, accelerations (using a visual 3D Vicon camera system), and forces from force plates and load cells along with 12 electromyography (EMG) signals for detecting muscle contractions were used to determine compression, shear and lateral forces on the L5/S1 disc. To get a more precise force impact on the L5/S1 disc, a technical coordinate system was created to define the orientation of the L5/S1 disc. A bottom-up approach of Newton-Euler dynamics was used using visual 3D software to estimate compression, shear, and torque force on estimated virtual landmark of L5/S1 disc. Results: This study has provided an alternative method to measure compression, shear, and torque forces at estimated location of L5/S1 disc proximal to the technical virtual landmarks. The results have shown to be consistent with other published research papers.

ISBN: 9798678167774Subjects--Topical Terms:

526216
Industrial engineering.
Subjects--Index Terms:

l5/s1 compression disc

A Ne W Method to Estimate the Impact on the L5/Si Spinal Disc from Speed Lifting of Unstable Loads, Asymmetrically.
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506 $a This item must not be sold to any third party vendors.
520 $a Background: The most significant causes of lower back injuries at work are probably from manual lifting activities. Lifting unstable loads pose a significant strain to the lower back and can cause debilitating lumbar spine injuries. The primary function of the vertebral column is to support the upper body. The L5/S1 disc junction located between the lumbar and the sacral regions of the vertebral column is the most critical joint in spine with respect to lifting strain. Because of its position and the amount of upper body weight it handles, it is particularly vulnerable to misalignment, wear and tear, and injury. Lifting loads has several adverse effects on the back: spinal compression and excessive strain on the back's tendons and ligaments may result in herniated or ruptured discs, disc degenerations, spinal stenosis, and other diseases. Biomechanical models have been developed to estimate the forces in the lumbar spine to determine the severity of lifting tasks, and NIOSH has developed an equation to determine a safe lifting load weight. However, neither covers all important types of lifting conditions adequately. The NIOSH equation does not include the lifting load type (stable versus unstable loads) as a variable due to insufficient research information, and the measurement of spinal force and body motion variables still need improvements to adequately measure and assess the severity of lifting unstable loads asymmetrically. Objective: The main objective of this study is to demonstrate a new method to measure compression, shear, and torque forces in L5/S1 disc when lifting unstable loads under different lifting conditions (load type, lifting style, and lifting speed). different lifting conditions (load type, lifting style, and lifting speed).Methods: A total of 3 subjects volunteered for this study to lift a bin, partly filled with water, with various lifting conditions while standing on force plates. Each subject lifted the bin (stable and unstable load) at two different speeds (normal and fast), and along two different planes of the body (sagittal and frontal) - a total of 8 lifting conditions. The water induced the required instability in the load during lifting. For simulating stable loads (of the same weight - 30 lb) solids replaced water in the same bin. Body joint angles, velocities, accelerations (using a visual 3D Vicon camera system), and forces from force plates and load cells along with 12 electromyography (EMG) signals for detecting muscle contractions were used to determine compression, shear and lateral forces on the L5/S1 disc. To get a more precise force impact on the L5/S1 disc, a technical coordinate system was created to define the orientation of the L5/S1 disc. A bottom-up approach of Newton-Euler dynamics was used using visual 3D software to estimate compression, shear, and torque force on estimated virtual landmark of L5/S1 disc. Results: This study has provided an alternative method to measure compression, shear, and torque forces at estimated location of L5/S1 disc proximal to the technical virtual landmarks. The results have shown to be consistent with other published research papers.
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