[C] 1.8 Irradiations and electricity as cause of disease Flashcards
1
Q
Electricity as a cause of disease
A
- Touching/biting a wire
- Hit by lightning bolt
- Death = Electrocution
2
Q
Give the influencing factors of electrocution
A
Influencing factors
- Current intensity, voltage, duration, earthing
- Resistance of the body (skin, wet ground)
3
Q
As voltage increases…
A
Resistance decreases
4
Q
Which current is most dangerous?
A
Alternating current
not direct current
5
Q
Medium amperage causes…
A
Disturbances
- Brain = Loss of consciousness
- Heart failure = Cardiac arrest
6
Q
Give the pathological signs of electrocution
A
- Entry: Current marks and arboreal patterns
- The cavity between str. corneum and str. spinosum (of skin)
- Electrolytic effect (direct current)
- Metallisation
- Spastic contractions
- Mechanical changes - secondary shock wave
7
Q
Arboreal patterns from electrocution are caused by…
A
m. erector pili
8
Q
Electrolytic effect
A
Coagulation, necrosis of tissues
9
Q
Metallisation
A
Dispersed metallic particles
10
Q
Spastic contractions are due to which nerve?
A
Vagus
11
Q
Mechanical changes from electrocution
A
- Fractures of bones
- Ruptures etc.
12
Q
Irradiation energy
A
- Electromagnetic rays
- Ultra-short waves
- Infrared waves
- Visible rays
- Ultraviolet rays
- Ionising rays
13
Q
Ultra-short waves
A
Microwaves - warming
14
Q
Infrared waves
A
- Warm surface radiations
- Capillary dilation - increased metabolic processes
15
Q
Visible waves
A
Have psychological effect
