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The potentially deadly threat changes in pressure pose for divers. What happens when a diver experiences the bends, and how can they be saved?Key facts
- The Bends is decompression sickness, which affects divers if they return to the surface too quickly.
- As a diver goes deeper underwater the pressure increases.
- Bubbles of nitrogen gas form in the bloodstream if there is a rapid increase in external pressure forces.
- Atmospheric pressure is caused by the weight of air above.
Transcript
Going deep underwater, divers face a potentially deadly threat – pressure.
Hydrostatic Pressure
Hydrostatic pressure is produced by the weight of water pressing on the diver.
It pushes against the diver from every direction, and increases with depth.
Pressure increases significantly with depth:
Surface = 100 kPa
10m depth = 200 kPa
20m depth = 300 ...
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