Term
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Definition
| chemical attraction between two substances |
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Term
| Prior exposure of smoking and faulty exhaust can lead to: |
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Definition
Residual Effects
Vulnerability to DCS |
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Term
|
Definition
| Chronic Obstructive Pulmonary Disease |
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Term
| COPD produces these side effects: |
|
Definition
-cilia become paralysed, cannot remove irritants
-can lead to blockage of the small airways
-decrease in lung compliance leads to vital capacity decreases
-vulnerable to DCS and pulmonary barotrauma
-can fail PFT (pulmonary function test) on diving medical |
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Term
| SIGNS AND SYMPTOMS OF CO POISONING |
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Definition
Headache; can be very severe
dizziness
fatigue
impaired vision
amnesia - confusion
cherry red lips (?)
nausea vomiting (flu-like symptoms)
unconsciousness |
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Term
| TREATMENT OF CO POISONING |
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Definition
-Remove the contaminant to prevent further exposure and give 100% O2.
-USN Treatment Table 6 |
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Term
|
Definition
| HIGH PRESSURE NERVOUS SYNDROME |
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Term
| H.P.N.S. is associated with |
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Definition
| deep diving in excess of 130 meters (400 ft) while breathing HeO2 |
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Term
| SIGNS AND SYMPTOMS OF H.P.N.S. |
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Definition
(central nervous system disorders)
tremors - hands shake
nausea and vomiting
in-coordination
loss of alertness, confusion
micro-sleep
electroencephalogram changes (EEG)
nightmares
irritability
coma |
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Term
| For HPNS the faster the rate of compression, the... |
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Definition
| the faster the rate of compression, the earlier the signs appear |
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Term
| H.P.N.S. can be delayed or prevented by: |
|
Definition
1) adding a narcotic gas (nitrogen)
2) reducing rate of compression |
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Term
|
Definition
| an excess of carbon dioxide in the tissues |
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Term
|
Definition
-inadequate ventilation of breathing equipment
-poor equipment design
-rapid, shallow breathing (esp. deepiving)
-increased density (depth)
-excessive CO2 in supply gas (failure of CO2 absorbent)
-Limit for Co2 in breathing air is 500 ppm (0.05%) |
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Term
| SIGNS AND SYMPTOMS OF HYPERCAPNIA |
|
Definition
-increased breathing and pulse rates
-headache
-unusual sweating
-restlessness, leading to fatigue
-nausea
-face is flushed (red) bloated and warm |
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Term
| PREVENTION For HYPERCAPNIA |
|
Definition
-proper ventilation of diving equipment (helmet, chamber)
-rest intervals during hard work |
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Term
| Treatment for Hypercapnia |
|
Definition
-remove from environment
-100% O2 |
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Term
|
Definition
the effect of nitrogen under pressure. It is sometimes called “rapture of the deep”
-Individual Susceptibility
-Some people are affected at 100 fsw , some at 200 fsw |
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Term
|
Definition
| “ martini’s law” = every 50 fsw add one martini |
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Term
| Narcosis can be aggravated by: |
|
Definition
-anxiety
-cold
-fatigue
-sedatives or alcohol |
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Term
| SIGNS AND SYMPTOMS OF NITROGEN NARCOSIS |
|
Definition
-100 ft euphoria
-Mild impairment
-Reasoning and memory impairment ( in some)
-165 fsw laughter
-overconfidence
-sleepiness |
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Term
| Nitrogen Narcosis at 300 ft: |
|
Definition
uncontrollable laughter
Terror in some
Severe mental & physical impairment |
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Term
| Nitrogen Narcosis > 300 fsw |
|
Definition
-hallucinations (more like drugs than alcohol)
-Total loss of physical and mental control
-unconsciousness, death |
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Term
| Prevention of Nitrogen Narcosis |
|
Definition
-limit air breathing to 165 fsw (50-60 meters)
-substitute another inert gas - helium |
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|
Term
| Treatment of Nitrogen Narcosis |
|
Definition
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