Occupational Medicine Quarterly Journal
فصلنامه علمی تخصصی طب کار
tkj
Medical Sciences
http://tkj.ssu.ac.ir
1
admin
2251-7189
2251-8274
8
7
14
8888
13
fa
jalali
1401
6
1
gregorian
2022
9
1
14
2
online
1
fulltext
fa
بررسی روایی روش بلند کردن بار به روش KIM-LHC بر مبنای بارهای بیومکانیکی در ارزیابی سطح ریسک برای وظایف بلند کردن دستی بار:یک مطالعه آزمایشگاهی
Assessment of the adecuacy of KIM-LHC method in assessing the risk level based on biomechanical loads for manual lifting tasks: A laboratory study
ارگونومی
Ergonomics
پژوهشي
Research
<span style="font-size:11pt"><span style="line-height:normal"><span style="direction:rtl"><span style="unicode-bidi:embed"><span calibri="" style="font-family:"><b><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">مقدمه و اهمیت موضوع: </span></span></b><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">حمل دستی بار شامل فعالیتهایی است که در آنها هل دادن، کشیدن، بلند کردن، پایین آوردن، حمل کردن و نگهداشتن بار صورت میگیرد، که بلند کردن بار رایجترین آنها است. هدف این مطالعه</span></span> <span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">بررسی قابلیت اطمینان روش </span></span><span dir="LTR" new="" roman="" style="font-family:" times="">KIM-LHC</span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> در شناسایی وظایف بلند کردن دستی بار پرخطر بود.</span></span></span></span></span></span></span><br>
<span style="font-size:11pt"><span style="line-height:normal"><span style="direction:rtl"><span style="unicode-bidi:embed"><span calibri="" style="font-family:"><b><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">مواد و روش‏ها: </span></span></b><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> این مطالعه مقطعی بر روی کارگران مرد سالم که سابقه حمل دستی بار داشتند در محیط آزمایشگاهی انجام شد. حجم نمونه با توجه به مطالعات پیشین 15 نفر تعیین گردید. از افراد خواسته شد 25 وظیفه باربرداری را با 4 بار تکرار و بهصورت تصادفی انجام دهند. برای تعیین زاویه خمش تنه از یک شیبسنج الکترونیکی استفاده شد و با استفاده از اطلاعات پوسچری و آنتروپومتری افراد، بارهای فشاری وارد بر مهره </span></span><span dir="LTR" new="" roman="" style="font-family:" times=""> L5/S1</span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">از طریق نرمافزار </span></span><span dir="LTR" new="" roman="" style="font-family:" times="">3DSSPP</span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> محاسبه شد</span></span><span dir="LTR" new="" roman="" style="font-family:" times="">.</span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> همچنین، همزمان وظایف با استفاده از روش </span></span><span dir="LTR" new="" roman="" style="font-family:" times="">KIM-LHC</span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> ارزیابی شدند و امتیازات نهایی و سطوح اقدامات لازم برای آنها تعیین گردید. دادهها با استفاده از نرمافزار </span></span><span dir="LTR" new="" roman="" style="font-family:" times="">SPSS.20</span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> و با استفاده از آزمون </span></span><span dir="LTR" new="" roman="" style="font-family:" times="">Chi-square</span><span style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> تجزیهوتحلیل شدند.</span></span></span></span></span></span></span><br>
<span style="font-size:11pt"><span style="line-height:normal"><span style="direction:rtl"><span style="unicode-bidi:embed"><span calibri="" style="font-family:"><b><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">نتایج: </span></span></b><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">نتایج تخمین نیروی فشاری برای وظایف باربرداری نشان داد، 92% از وظایف دارای سطح خطر پایین (کمتر از 3400 نیوتن) و 8% وظایف سطح خطر متوسط (3400 تا 6800 نیوتن) بودند.</span></span> <span lang="AR-SA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"><span style="color:black">درحالیکه نتایج روش </span></span></span><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">KIM-LHC</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"><span style="color:black"> نشان داد 28% وظایف دارای سطح خطر پایین، 64% سطح متوسط و 8% دارای سطح خطر بالابودند</span></span></span><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">.</span></span><span lang="FA" style="font-size:12.0pt"><span style="font-family:"B Nazanin""></span></span></span></span></span></span></span><br>
<span style="font-size:11pt"><span style="line-height:normal"><span style="direction:rtl"><span style="unicode-bidi:embed"><span calibri="" style="font-family:"><b><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">نتیجه‏ گیری: </span></span></b><span lang="AR-SA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">نتایج این مطالعه نشان داد که بین سطوح ریسک حاصل از روش </span></span><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">KIM-LHC</span></span><span lang="AR-SA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> و نیروی فشاری تخمین زدهشده برای برخی از وظایف باربرداری طراحیشده </span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">ارتباط معناداری وجود ندارد</span></span><span lang="AR-SA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">. بنابراین احتمال وجود خطا در تخمین سطح ریسک برخی از وظایف باربرداری به روش </span></span><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">KIM-LHC</span></span><span style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> وجود دارد و میبایست مطالعات بیومکانیکی بیشتری ازلحاظ کینتیکی و کینماتیکی انجام شود. </span></span><b><span lang="FA" style="font-size:12.0pt"><span style="font-family:"B Nazanin""></span></span></b></span></span></span></span></span><br>
<span style="font-size:11pt"><span style="line-height:normal"><span calibri="" style="font-family:"><b><i><span style="background:white"><span new="" roman="" style="font-family:" times="">Introduction</span></span></i></b><strong calibri="" style="font-family:"><span new="" roman="" style="font-family:" times="">:</span></strong> <span new="" roman="" style="font-family:" times=""><span style="color:#0e101a">Manual Material handling includes activities in which pushing, pulling, lifting, lowering, carrying, and holding the load, the most common of which is lifting. This study aimed to evaluate the reliability of the KIM-LHC method to identify high-risk manual load lifting tasks.</span></span></span></span></span><br>
<span style="font-size:11pt"><span style="line-height:normal"><span calibri="" style="font-family:"><b><i><span style="background:white"><span new="" roman="" style="font-family:" times="">Material and Methods</span></span></i></b><strong calibri="" style="font-family:"><span new="" roman="" style="font-family:" times="">:</span></strong> <span new="" roman="" style="font-family:" times=""><span style="color:#0e101a">This cross-sectional study was performed on healthy male workers with a history of manual material handling in a laboratory setting. The sample size was determined according to previous studies of 15 people. The participants were required to perform 25 tasks with four iterations randomly. An inclinometer device was used to determine the forward bending angle at the waist. Compression loads exerted on L5/S1 were estimated using 3DSSPP software using participants' postural and anthropometric information. Also, the tasks were evaluated using the KIM-LHC method, and their final scores and levels of MSD risks were determined. Data were analyzed using SPSS.20 software and the Chi-square test.</span></span></span></span></span><br>
<span style="font-size:11pt"><span style="line-height:normal"><span calibri="" style="font-family:"><strong calibri="" style="font-family:"><i><span new="" roman="" style="font-family:" times="">Results</span></i></strong><strong calibri="" style="font-family:"><span new="" roman="" style="font-family:" times="">:</span></strong> <span new="" roman="" style="font-family:" times=""><span style="color:#0e101a">The results of compression load estimation for lifting tasks showed that 92% of the tasks had a low-risk level (less than 3400 N), and 8% of the tasks had a medium-risk level (3400 to 6800 N). While the results of the KIM-LHC method showed that 28% of tasks had a low-risk level, 64% had a medium level, and 8% had a high-risk level. </span></span><span style="font-size:12.0pt"><span new="" roman="" style="font-family:" times=""><span style="color:#0e101a"></span></span></span></span></span></span><br>
<span style="font-size:11pt"><span style="line-height:normal"><span calibri="" style="font-family:"><strong calibri="" style="font-family:"><i><span new="" roman="" style="font-family:" times="">Conclusion</span></i></strong><span new="" roman="" style="font-family:" times="">: </span><span new="" roman="" style="font-family:" times=""><span style="color:#0e101a">The results of this study showed no correlation between the risk levels of the KIM-LHC method and the estimated compression load for some designed lifting tasks. Therefore, there is a possibility of error in estimating the risk level of some lifting tasks by the KIM-LHC method, and more biomechanical studies should be performed on kinetics and kinematics. </span></span></span></span></span><br>
نیروی فشاری, KIM-LHC , بلند کردن بار
Compressive force, KIM-LHC, lifting load
34
43
http://tkj.ssu.ac.ir/browse.php?a_code=A-10-1160-1&slc_lang=fa&sid=1
Davood
afshari
داوود
افشاری
davodafi@yahoo.coma