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Management of Work in Hot Environments “Safety in the Heat” Trainers Presentation With thanks to Dr Graham Bates, Dr John Schneider and Dr Veronica Miller © Health Authority - Abu Dhabi 2009

NOTE ,[object Object],[object Object],[object Object]

Overview ,[object Object],[object Object],[object Object],[object Object]

Introduction ,[object Object],[object Object],Heat In Heat Out

How does heat alter this? ,[object Object],[object Object],[object Object]

Blood - the key component ,[object Object],[object Object],[object Object]

So what happens when I work in the heat? ,[object Object],[object Object],[object Object]

Dehydration: the impact ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Dehydration facts ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Dehydration: the impact ,[object Object],[object Object],[object Object]

Summary ,[object Object],[object Object]

So what exactly is in sweat? ,[object Object],[object Object],[object Object],[object Object]

Fine, but how much fluid do you lose? ,[object Object],[object Object],Hourly Sweat Rate over 6 Hours at 35 ° C and 50% RH

What about salt? ,[object Object],[object Object],[object Object],[object Object],Sodium Concentration changes in Arms and Legs over 6 hours (Mean+/- SD)

What’s wrong with caffeine and alcohol? ,[object Object]

Alcohol : an example ,[object Object],-And you drink 3 litres of full-strength beer -you produce 3.5 kg urine Net LOSS = 0.5 kg -End up 3.5 kg dehydrated -And you drink 3 litres of pure water -you produce 0.0 kg urine. Net GAIN = 3 kg -End up hydrated

Caffeine ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Caffeine (cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What you can do to limit these effects ,[object Object],[object Object],[object Object],[object Object],[object Object]

Can hydration status be tested? ,[object Object],[object Object],[object Object]

Specific Gravity : what it means ,[object Object],[object Object],[object Object],[object Object],[object Object]

So what are the health problems associated with heat stress? ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Long term health effects of heat stress ,[object Object],[object Object],[object Object]

What about safety issues? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Acclimatisation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The 3 phases of acclimatisation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Acclimatisation, how long does it take to gain and lose?

Acclimatisation benefits ,[object Object],[object Object],[object Object],[object Object]

Other benefits ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Air-conditioning ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What factors will affect our ability to remove excess heat? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why does my weight matter? ,[object Object],[object Object],[object Object],[object Object],[object Object]

BMI – the impact ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The importance of physical fitness ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What else can you do outside the workplace? ,[object Object],[object Object],[object Object]

So what factors are we talking about in relation to heat stress? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Air Temperature

Radiant Heat ,[object Object],[object Object],[object Object]

Relative Humidity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Wind Speed ,[object Object],[object Object],[object Object],[object Object],[object Object]

Personal Protection Equipment ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Visitors ,[object Object],[object Object],[object Object]

How can we measure the workplace environment? ,[object Object],[object Object],[object Object],[object Object]

The equation: Heat generated by worker + heat from the environment Cooling due to evaporation & other means

Thermal Work Limit ,[object Object],[object Object]

So what does it mean? ,[object Object],[object Object],[object Object]

TWL (cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Calculating TWL ,[object Object],[object Object],[object Object]

TWL cut-offs ,[object Object],[object Object],[object Object],[object Object],[object Object]

Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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