The study of umbrella insulation affecting core temperature and vital sing of gardeners in university of Phayao

Abstract

                    The aims of this quasi-experimental study to determine the type of umbrella whose attached by aluminum foil insulator in 3 condition ;  (1) no umbrella  (2)  umbrella  whose attached aluminum foil  insulator inside (2)  and   outside   (3)  and   changing   temperature   and  vital   sign   in  30 gardeners   who   worked   in  University   of  Phayao.   The  comparison  of satisfaction  between  umbrella  whose  attached  aluminum  foil  insulator inside  and   outside  during   work.   Thirty  gardeners  were   recruited  by purposive sampling.  They were interviewed in general characteristic, heat exposure during  work, and  assessed  their vital  sign such as the personal heat stress (core  temperature),  blood  pressure,  heart rate,  percentage of oxygen  saturation  in  blood.  The  working  environment  were measured wet  bulb  globe  temperature  (WBGT)  and  wind  velocity.   All  data were analyzed  by SPSS for window.  The descriptive data (basic  characteristics, temperature and vital sign) were expressed in numbers, percentage, mean and standard deviation.  All parameters in 3 condition ; (1) no umbrella (2) umbrella  whose  attached  aluminum  foil  insulator inside (2) and outside (3) were  compared  by  One-Way  ANOVA , while the  satisfaction  of  using umbrella in 2 types were analyzed by paired t-test.

                    During  subjects worked with  umbrella  attached by  aluminum foil insulator outside, they had WBGT and vital sign (core temperature and heart rate) lower than those (p<0.05). But they prefer umbrella attached by aluminum foil insulator inside more than outside; mean ± S.D. at 3.07±0.63 and 2.99±0.56, respectively (p=0.003).

                    Therefore ,  the  gardeners   or   employers  should  provide  the umbrella  attached with aluminium foil outside that is more effective than inside,  to protect themselves (vital sign)  and  declined the ultraviolet,  hot working environment and disorders from heat such as heat stroke.