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Chapter 3 - Breathing Gas and the Effects on Your Body

Terms in this set (20)

The only accepted treatment for Arterial Gas Embolism is:

A - All are accepted treatments

B - Immediate recompression by taking the victim underwater to relieve the symptoms

C - Stabilize victim in nearest medical facility and transport to decompression chamber for recompression

D - Surgery to repair the ruptured lung
C - Stabilize victim in nearest medical facility and transport to decompression chamber for recompression
The proper first aid for Arterial Gas embolisim, Subcutaneous emphysema, Pneumothorax, and Mediastinal Emphysema is:

A - Administer oxygen (if qualified)

B - Watch Vital signs, treat for shock and stand by to administer cardio-pulmonary resuscitation (if qualified)

C - All answers are correct

D - Seek proper medical aid (a recompression chamber) as quickly as possible
C - All answers are correct
The major, and most common, symptom of decompression sickness is:

A - A feeling of euphoria

B - Joint pain

C - Respiratory failure

D - Puffiness in the neck and shoulder areas
B - Joint pain
Overexpansion injuries can be prevented by:

A - Never holding your breath while diving

B - Learning the correct breathing patterns reinforced in classroom, pool, and open water training

C - All answers are correct

D - Dive with a properly maintained high-quality Total Diving System
C - All answers are correct
Which of the following overexpansion injuries can be characterized by swelling in the neck area with a crackling sensation upon touching the swollen area?

A - Arterial Gas Embolism

B - Pneumothorax

C - Mediastinal emphysema

D - Subcutaneous emphysema
D - Subcutaneous emphysema
Which of the following overexpansion injuries can be characterized by chest pain, breathing difficulties, weakness, and cyanosis (blueness) of the lips and nail beds:

A - Rupture of Eardrum

B - Mediastinal Emphysema and Pneumothorax

C - Bends

D - Subcutaneous Emphysema
B - Mediastinal Emphysema and Pneumothorax
The most serious lung overexpansion injury is:

A - Pneumothorax

B - Mediastinal emphysema

C - Arterial Gas Embolism

D - Subcutaneous emphysema
C - Arterial Gas Embolism
The rate at which the body becomes saturated with nitrogen:

A - Is always the same rate

B - Will vary based on factors such as depth and blood supply to a particular are of the body

C - Is slower at the beginning of the process and fast at the end of the process

D - Is faster at the beginning of the process and slower at the end of the process
B - Will vary based on factors such as depth and blood supply to a particular area of the body
Which of the following would be inappropriate treatment for a diver evidencing symptoms of Decompression Sickness?

A - Administering CPR

B - Administering pure oxygen (if qualified)

C - Treat for shock

D - Taking the victim back underwater
D - Taking the victim back underwater
Dalton's Law can be paraphrased by:

A - The total pressure of the water surrounding a diver

B - The percentage of nitrogen that causes decompression sickness

C - The total pressure of a mixture of gases equals the sum of the partial pressures

D - The pressure of the water plus 1 bar
C - The total pressure of a mixture of gases equals the sum of the partial pressures
The term gradient can be described as:

A - The total pressure of all gases

B - Total tissue saturation

C - As always zero when the diver is super-saturated

D - The difference between the internal partial pressure and the external partial pressure of a gas
D - The difference between the internal partial pressure and the external partial pressure of a gas
Decompression sickness occurs when:

A - A diver stays at depth too long and surfaced too quickly

B - All answers are correct

C - Excess nitrogen bubbles out of solution into the blood and tissues

D - The nitrogen tissue tolerance gradient is exceeded
B - All answers are correct
Haldanes theory that the human body can withstand a 2:1 pressure ratio was revised by D Workman to a nitrogen ratio of:

A - 1 : 1

B - 5 : 1

C - 3 : 1

D - 1.58 : 1
D - 1.58 : 1
If a flexible air-filled container at 30 meters of sea water has a volume of 6 liters, what would be the volume if it were transported to the surface?

A - 6 liters

B - 24 liters

C - 12 liters

D - 18 liters
B - 24 liters
Gas can enter the bloodstream and cause serious damage to the lungs or even death by:

A - Ascending too fast

B - Holding your breath while diving

C - Diving with respiratory congestion

D - All answers are correct
D - All answers are correct
In air at 1 bar, the partial pressure of nitrogen is _______, oxygen is _______.

A - 0.79/0.21 bar

B - 1.5/0.8 bar

C - 0.21/0.79 bar

D - 0.8/0.4 bar
A - 0.79/0.21 bar
Diving at altitude or flying after diving:

A - Requires special diving computer functions, altitude tables and/or refraining from flying for at least 24 hours after the completion of a dive

B - Allows the diver to spend a greater amount of time at depth without exceeding the no-decompression limits

C - Allows the diver to ignore the no-decompression limits

D - Does not require any special considerations for the diver
A - Requires special diving computer functions, altitude tables and/or refraining from flying for at least 24 hours after the completion of a dive
The transfer of oxygen and nitrogen into the bloodstream occurs through the walls of the:

A - Arteries

B - Blood vessels

C - Alveoli

D - Bronchiole trees
C - Alveoli
Other symptoms of decompression sickness include:

A - All answers are correct

B - Itchy skin

C - Paralysis and loss of manual dexterity

D - Numbness
A - All answers are correct
The best prevention for decompression sickness is to:

A - Dive with a buddy that has a computer

B - Never dive below 30 meters

C - Never hold your breath

D - Plan your dive and dive your plan
D - Plan your dive and dive your plan
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