Diving Injuries Flashcards
(37 cards)
What is VENTIDC?
- Visual
- Ears
- Nausea
- Twitching
- Irritation
- Dizziness
- Convulsions
Used to remember CNS Oxygen Toxicity
What is Barotrauma on descent referred to as?
Squeeze
What is barotrauma on ascent called?
Reverse Squeeze
What is GRAVE?
The five conditions required for “Squeeze” to occur.
* Gas-filled space
* Rigid Walls
* Ambient pressure change
* Vascular Supply
* Enclosed spaces
What is Dalton’s Law?
The total pressure exerted by a mixture of gases is equal to the sum of the pressures of each of the different gases making up the mixture, with each gas acting as if it alone was present and occupied the total volume.
What is the most gas used for diving and it’s make up?
Atmospheric Air
* Nitrogen (N2)- 79%
* Oxygen (O2)- 21%
With minor amounts of
Carbon Dioxide (CO2)
Carbon Monoxide (CO)
Which one states that “At constant temperature, the absolute pressure and the volume of gas are inversely proportional”?
Boyle’s Law
What is Charles’/Gay-Lussac’s Law?
At a constant pressure, the volume of a gas is directly proportional to the change in the absolute temperature.
“The total pressure exerted by a mixture of gases is equal to the sum of the pressures of each of the different gases making up the mixture, with each gas acting as if it alone was present and occupied the total volume.” Defines which law?
Dalton’s Law
What is Henry’s Law?
The amount of any given gas that will dissolve in a liquid at a given temperature is directly proportional to the partial pressure of that gas.
“The amount of any given gas that will dissolve in a liquid at a given temperature is directly proportional to the partial pressure of that gas” is what law?
Henry’s Law
What is Dalton’s Law?
“The total pressure exerted by a mixture of gases is equal to the sum of the pressures of each of the different gases making up the mixture, with each gas acting as if it alone was present and occupied the total volume.”
What is Boyle’s Law?
At constant temperature, the absolute pressure and the volume of gas are inversely proportional.
What are the six basic types of energy?
- Mechanical
- Heat
- Light
- Chemical
- Electromagnetic
- Nuclear
What are the ways heat are generated and transferred to one place to another?
- Conduction
- Convection
- Radiation
What atmospheric pressure?
Constant with sea level and is = to 33 ft of sea water (fsw)
What is hydrostatic pressure?
The pressure due to the weight of a water column.
Also measured as the diver’s gauge pressure.
What is absolute pressure?
The total pressure being exerted, (Gauge pressure + Atmospheric pressure) known as an “ata”
What is the Archimedes’ principle?
Any object wholly or partly immersed in a fluid is buoyed up by a force equal to the weight of the fluid displaced by the object.
What are some of the warning symptoms of CNS Oxygen Toxicity?
V.E.N.T.I.D.C
* Visual Symptoms (Blured vision, tunnel vision
* Ear Symptoms ( Tinnitus)
* Nausea
* Twitching and Tingle symptoms (of affected sites)
* Irritability (AMS such as confusion, agitation and anxiety)
* Dizziness ( Clumsiness, Incoordination, fatigue)
* Convulsions
What is Swimming induced Pulmonary Edema (SIPE)?
Occurs while swimming in water, immersion causes fluid to leak out of the circulation system and accumulate first in the interstitial tissues of the lungs then in the alveoli themselves.
What are some factors/symptoms of Swimming Induced Pulmonary Edema(SIPE)?
- Imerrison in cold water
- Negative pressure breathing
- Overhyrdation
- Cough
- SOB
- Productive cough with blood (Hemaparesis)
What treatment is required for SIPE?
Rest and O2
What is barotrauma?
damage to body tissues from the mechanical effects of pressure, results when pressure differentials between body cavities and the hydrostatic pressure surrounding the body.
