swb shallow water blackout by michelle brislen. what is swb? loss of consciousness while in water...
TRANSCRIPT
What is SWB?What is SWB?
Loss of Consciousness while in water Usually caused by hyperventilation
while freediving or breath-holding Often happens to freedivers,
athletes, and good swimmers. Can happen in the ocean, pools,
lakes, rivers, etc.
Loss of Consciousness while in water Usually caused by hyperventilation
while freediving or breath-holding Often happens to freedivers,
athletes, and good swimmers. Can happen in the ocean, pools,
lakes, rivers, etc.
Energy ProcessesEnergy Processes
QuickTime™ and a decompressor
are needed to see this picture.
Cellular Respiration C6H12O6 + 6O2 6CO2 + 6H2O + Energy
€
→Sugar Oxygen Carbon Dioxide
Water
How does it happen?How does it happen?
Release of CO2 (Carbon Dioxide) through hyperventilation or deep exhales
When under water O2 (Oxygen) is used up and turned in to CO2
CO2 is lower than normal because of hyperventilation thus decrease urge to breathe
Stay down/under water longer and O2 continues to be used and deprives brain
Blackout occurs
Release of CO2 (Carbon Dioxide) through hyperventilation or deep exhales
When under water O2 (Oxygen) is used up and turned in to CO2
CO2 is lower than normal because of hyperventilation thus decrease urge to breathe
Stay down/under water longer and O2 continues to be used and deprives brain
Blackout occurs
How to Prevent SWBHow to Prevent SWB Do not hyperventilate Do not have breath-hold competitions
under water Do not perform underwater laps When you feel the urge to breathe, begin
your ascent “Leave something in the tank!”
Dive with a Buddy!!!! Maintain watch for 30 seconds after surfacing
Be weighted correctly and willing to release your belt if you’ve pushed it too far.
Tell your friends! Adults too!
Do not hyperventilate Do not have breath-hold competitions
under water Do not perform underwater laps When you feel the urge to breathe, begin
your ascent “Leave something in the tank!”
Dive with a Buddy!!!! Maintain watch for 30 seconds after surfacing
Be weighted correctly and willing to release your belt if you’ve pushed it too far.
Tell your friends! Adults too!
ReferencesReferences
shallowwaterblackoutprevention.org “Confessions of a Freediving Spearo” by
Sheri Daye; Hawaii Skin Diver Magazine 2010
www.aquaticsafetygroup.com/PDF/DyingforAirAquaticsInternationalFebruary2005.PDF
www.aquaticsafetygroup.com/PDF/ShallowWaterDeathTheCombatEdge2003.pdf
www.wikipedia.com
shallowwaterblackoutprevention.org “Confessions of a Freediving Spearo” by
Sheri Daye; Hawaii Skin Diver Magazine 2010
www.aquaticsafetygroup.com/PDF/DyingforAirAquaticsInternationalFebruary2005.PDF
www.aquaticsafetygroup.com/PDF/ShallowWaterDeathTheCombatEdge2003.pdf
www.wikipedia.com