DIVING EMERGENCIES. Dr. Ülkümen Rodoplu V. Mediterranean Emergency Medicine Congress 14-17 September 09, Valencia. Who is the protector of divers ?. Oceanus . Drunken Dionysus . The second biggest in the World. St. Pierre. I ntroduction. SCUBA diving accidents are fairly uncommon .
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Dr. Ülkümen Rodoplu
V. Mediterranean Emergency Medicine Congress
14-17 September 09, Valencia
(This is also why you have to pop your ears as you descend.)
“For any gas at a constant temperature, the volume of the gas will vary inversely with the pressure, and the density of the gas will very directly with the pressure.”
If T= constant, then V 1/P and Density P
(Never hold your breath!)
For any gas at a constant pressure, the volume of the gas will very directly with the absolute temperature.
If P= constant, then V T
For any gas at a constant volume, the pressure of the gas will vary with the absolute temperature.
If V= constant, then P T
(keep tanks cool and don’t fill them too fast.)
The amount of any given gas will dissolve in a liquid at a given temperature is proportional to the partial pressure of that gas in equilibrium with the liquid and the solubility coefficient of the gas in the particular liquid.
An increase in pressure will increase absorption
(Oxygen in your blood dissolves at a given pressure.)
in the blood and tissues are in
proportion to the partial pressures
of the gases in the person's lungs
at the surface.
ambient pressure increases, and
therefore the pressure of the gas
inside the lungs increases.
can occur in the sinuses,
producing severe frontal
headaches or pain beneath
the eye in the maxillary sinuses.
* Depth of dive
* Number of dives
* Duration of dive
greater than one atmosphere
Mechanical effect of increased pressure:
- Any free gas trapped in the body will decrease in volume as the pressure on it increases
- Successfully applied to air embolism
and decompression sickness