Please enable JavaScript.
Coggle requires JavaScript to display documents.
Diving Emergencies, PROBLEMS - Coggle Diagram
Diving Emergencies
Barotrauma
ARTERIAL GAS EMBOLISM
2nd most common cause of death
Pulmonary barotrauma
Barotrauma = damage to tissues due to change in pressure.
Descent barotrauma
SQUEEZE
External pressure exceeds pressure inside air filled cavity
Pain
Odema
Capillary rupture
Haemorrhage
Must ascend until pain subsides
Ascent barotrauma
Decompression Illness
Gas release, embolism formation
Alveoli rupture
Air can leak into circulation
Air embolus
Occur within 10 minutes of surfacing
Often neurological
Vertigo
1 more item...
AGE
It's all about pressure
Every 10m underwater increase pressure by 1 atmosphere
Boyles Law
At a constant temperature the volume of gas is inversely proportional to it's pressure.
Henry's Law
At a constant temperature the amount of gas dissolved in a liquid is proprtional to the partial pressure of the gas in equilibrium with the liquid!
Charles Law
A change in temperature will have a proportional change in volume and gas pressure
Most effect 10m closest to surface
Volume doubles for each atmosphere of pressure
NITROGEN NARCOSIS
Neurodepressant
Impaired judgement
Often on deep dives >30m
Unconscious at approx 90m
PULMONARY OVER-PRESSURISATION SYNDROME (POPS)
Barotrauma
Caused by not breathing out whilst ascending
Pneumothorax
Pnemomediastinum
AGE
Subcutaneous/interstitial Emphysema
Chest pain
Shortness of Breath
PROBLEMS
Holding breath during ascent
Ascending or descending too quickly