Iranian Journal of Ergonomics
مجله ارگونومی
Iran J Ergon
Medical Sciences
http://journal.iehfs.ir
1
admin
1735-1960
2345-5365
8
10.53208/IJE
14
13
fa
jalali
1393
12
1
gregorian
2015
3
1
2
4
online
1
fulltext
fa
اعتبار سنجی شاخص استرین ادراکی برای ارزیابی استرین گرمایی در شرایط گرم آزمایشگاهی
Validating the perceptual strain index for the evaluation of heat strain under hot laboratory conditions
سایر موارد
Other Cases
پژوهشي
Research
<p style="margin-bottom: 0.0001pt text-align: justify line-height: normal background: none repeat scroll 0% 0% rgb(217, 217, 217) direction: rtl unicode-bidi: embed" dir="rtl" class="MsoNormal"><b><span lang="FA">مقدمه: </span></b><span lang="FA">بروز استرس گرمایی یکی از شایعترین مشکلات
در محیطهای کاری و صنایع مختلف میباشد. مواجهه کارگران با گرما سبب بروز استرین حرارتی
میشود. هدف از این مطالعه اعتبارسنجی شاخص استرین ادراکی از طریق ارتباط آن با شاخص
استرین فیزیولوژیکی و شاخص دمای تر گویسان در شرایط گرم آزمایشگاهی بود. </span></p>
<p style="margin-bottom: 0.0001pt text-align: justify line-height: normal background: none repeat scroll 0% 0% rgb(217, 217, 217) direction: rtl unicode-bidi: embed" dir="rtl" class="MsoNormal"><b><span lang="FA">مواد و روش ها:</span></b><span lang="FA"> این مطالعه بهصورت مقطعی و بر روی 15 نفر
مرد در پنج شرایط دمایی مختلف (35و21,24,27,30درجه سانتیگراد) در اتاقک شرایط جوی
و بر روی تردمیل در سه سطح فعالیت سبک (2/4کیلومتربرساعت), متوسط (4/8کیلومتربرساعت)
و سنگین (6/3کیلومتربرساعت) انجامگرفت. ضربان قلب و دمای دهانی برای محاسبه شاخص استرین
فیزیولوژیکی, و همچنین احساس گرمایی و شدت فعالیت اعمالشده ادراکی برای محاسبه شاخص
استرین ادراکی اندازهگیری شدند. درنهایت با استفاده از آزمون همبستگی پیرسون و آنالیز
رگرسیون همبستگی بین شاخصهای موردنظر مورد تحلیل قرار گرفتند.</span></p>
<p style="margin-bottom: 0.0001pt text-align: justify background: none repeat scroll 0% 0% rgb(217, 217, 217) direction: rtl unicode-bidi: embed" dir="rtl" class="MsoNormal"><b><span lang="FA" style="line-height: 115%">یافته ها:</span></b><span lang="FA" style="line-height: 115%"> </span><span lang="AR-SA" style="line-height: 115%">آزمون همبستگی پیرسون بین شاخص استرین ادراکی با شاخص
استرین فیزیولوژیکی همبستگی بالایی(</span><span style="font-size: 10pt line-height: 115%" dir="ltr">r=0/94</span><span lang="AR-SA" style="line-height: 115%">) را</span><span dir="ltr"></span><span dir="ltr"></span><span lang="AR-SA" style="font-size: 10pt line-height: 115%" dir="ltr"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="line-height: 115%">نشان داد(<a name="OLE_LINK44"></a><a name="OLE_LINK28"><span>p=0/001</span></a></span><span dir="rtl"></span><span dir="rtl"></span><span lang="AR-SA" style="line-height: 115%"><span dir="rtl"></span><span dir="rtl"></span>). بین
شاخص استرین ادراکی به ترتیب با</span><span dir="ltr"></span><span dir="ltr"></span><span lang="AR-SA" style="font-size: 10pt line-height: 115%" dir="ltr"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="line-height: 115%">دمای دهانی و</span><span dir="ltr"></span><span dir="ltr"></span><span lang="AR-SA" style="font-size: 10pt line-height: 115%" dir="ltr"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="line-height: 115%">ضربان قلب نیز همبستگی</span><span lang="FA" style="line-height: 115%"> بالایی(r=0/78</span><span lang="FA" style="line-height: 115%">)(r=0/90</span><span dir="rtl"></span><span dir="rtl"></span><span lang="FA" style="line-height: 115%"><span dir="rtl"></span><span dir="rtl"></span>)</span><span lang="AR-SA" style="line-height: 115%">مشاهده شد(p=0/001</span><span style="font-size: 10pt line-height: 115%" dir="ltr"> </span><span dir="rtl"></span><span dir="rtl"></span><span lang="FA" style="line-height: 115%"><span dir="rtl"></span><span dir="rtl"></span>)(p=0/001</span><span style="font-size: 10pt line-height: 115%" dir="ltr"> </span><span dir="rtl"></span><span dir="rtl"></span><span lang="AR-SA" style="line-height: 115%"><span dir="rtl"></span><span dir="rtl"></span>). همچنین
</span><span lang="FA" style="line-height: 115%">بین شاخص استرین ادراکی با دمای تر گویسان همبستگی متوسطی(r=0/71</span><span dir="rtl"></span><span dir="rtl"></span><span lang="FA" style="line-height: 115%"><span dir="rtl"></span><span dir="rtl"></span>)وجود داشت (p=0/001</span><span lang="FA" style="line-height: 115%">)ولی بین شاخص استرین ادراکی با شاخص
توده بدنی ارتباطی مشاهده نشد<a name="OLE_LINK41"></a><a name="OLE_LINK40"><span> (r=0/0009</span></a></span><span><span><span lang="FA" style="line-height: 115%">) (p=0/79</span></span></span><span><span><span dir="rtl"></span><span dir="rtl"></span><span lang="FA" style="line-height: 115%"><span dir="rtl"></span><span dir="rtl"></span>)</span></span></span><span></span><span></span><span lang="FA" style="line-height: 115%">.</span></p>
<p style="margin-bottom: 0.0001pt text-align: justify background: none repeat scroll 0% 0% rgb(217, 217, 217) direction: rtl unicode-bidi: embed" dir="rtl" class="MsoNormal"><b><span lang="FA" style="line-height: 115%">نتیجه گیری:</span></b><span lang="FA" style="line-height: 115%"> یافتههای تحقیق نشان داد در مواقعی که دسترسی به سایر روشهای
ارزیابی استرس گرمایی وجود ندارد میتوان از شاخص استرین ادراکی در ارزیابی استرین
گرمایی استفاده کرد چونکه همبستگی قابل قبولی با شاخصهای معتبر استرس گرمایی داشت.</span><span lang="FA" style="line-height: 115%"> </span><span lang="AR-SA" style="line-height: 115%"></span></p>
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<p class="MsoNormal" style="margin-bottom: 0.0001pt background: none repeat scroll 0% 0% rgb(217, 217, 217)"><b><span>Introduction</span></b><span>: The incidence of heat stress</span><span> </span><span>is one of the most common problems in work
environments as well as many different industries.</span><span> </span><span>The exposure of workers to heat results
in heat strain.</span><span> The purpose of the
present study was </span><span>to validate the Perceptual Strain Index through </span><span>determining its </span><span>relationship to the </span><a name="OLE_LINK65"></a><a name="OLE_LINK64"><span><span>Physiological Strain
Index </span></span></a><span>and the Wet Bulb
Globe Temperature Index under </span><span>hot laboratory conditions.</span></p>
<p class="MsoNormal" style="margin-bottom: 0.0001pt background: none repeat scroll 0% 0% rgb(217, 217, 217)"><b><span>Materials and Methods</span></b><span>: The present cross-sectional study was
conducted on 15 men in five different temperature conditions (21, 24, 27, 30
and 35ºC) in a climate chamber and on the treadmill with three different
activity levels –light (2.4km/h), medium (4.8km/h) and heavy (6.3km/h).
Participants' heart rate and oral temperature were measured</span><a name="OLE_LINK69"></a><a name="OLE_LINK68"><span><span> in order to
calculate the Physiological Strain Index</span></span></a><span>, and their</span><span> thermal sensation and the rate of
perceived exerted activity were measured for calculating the Perceptual Strain
Index. The correlations between the indices were then evaluated using Pearson's
correlation test and the regression analysis.</span></p>
<p class="MsoNormal" style="margin-bottom: 0.0001pt background: none repeat scroll 0% 0% rgb(217, 217, 217)"><b><span>Results: </span></b><span>Pearson's correlation test <a name="OLE_LINK73"></a><a name="OLE_LINK72"><span>showed a significant correlation </span></a><a name="OLE_LINK71"></a><a name="OLE_LINK70"><span>between
the Perceptual Strain Index</span></a> and the <a name="OLE_LINK18"></a><a name="OLE_LINK19"><span>Physiological Strain
Index</span></a> (P=0.001 and r=0.94)</span><a name="OLE_LINK75"></a><a name="OLE_LINK74"><span><span>. The </span></span></a><span><span><span>Perceptual Strain Index </span></span></span><span>was also found to have a significant
correlation <a name="OLE_LINK4">with oral temperature and heart rate</a> (p=0.001
and r=0.78 (p=0.001 and r=0.90). In addition,</span><span> </span><span>a significant correlation was found
between the Perceptual Strain Index and</span><span> the </span><span>Wet Bulb Globe Temperature Index (p=0.001 and
r=0.71) however, no </span><span>relationship </span><span>was observed</span><span> </span><span>between the
Perceptual Strain Index and the Body Mass Index (p=0.79 and r=0.0009). </span></p>
<p class="MsoNormal" style="margin-bottom: 0.0001pt text-align: justify line-height: normal background: none repeat scroll 0% 0% rgb(217, 217, 217)"><b><span>Conclusion</span></b><span>: The findings of the
study showed that the Perceptual Strain Index can be used for evaluating heat
strain in the absence of access to other methods of evaluating heat stress <a name="OLE_LINK6"></a><a name="OLE_LINK5"><span>as
it has an acceptable correlation </span></a>with valid indices of heat stress.</span><span style="font-size: 10pt"></span></p>
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استرین ادراکی, استرین گرمایی, استرین فیزیولوژیکی, اتاقک شرایط جوی
Perceptual strain, Heat strain, Physiological strain, Climate chamber
55
63
http://journal.iehfs.ir/browse.php?a_code=A-10-272-1&slc_lang=fa&sid=1
Habibollah
Dehghan
حبیب الله
دهقان
ha_dehghan@hlth.mui.ac.ir
10031947532846002453
10031947532846002453
Yes
Assistant Professor, Department of Occupational Health Engineering, School of health , Isfahan University of medical sciences , Isfahan , Iran
استادیار، گروه مهندسی بهداشت حرفهای، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران
Aioob
Ghanbary sartang
ایوب
قنبری سرتنگ
10031947532846002454
10031947532846002454
No