Electrical & Lightning Injuries. Carly Thompson EM-Resident April 9, 2009. Electrical Injuries Definitions Epidemiology and Physics Physiologic Effects of Electricity Specific Injuries ED Management of Electrical Injuries Cases. Lightning Pathophysiology of Lightning
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April 9, 2009
– tissue damage
– cutaneous injury
3 Groups at Risk for Electrical Injuries:
I (Current) = V (Voltage) / R (Resistance)
Current is directly proportional to potential difference, and inversely proportional to resistance.
Example = Grasp 120V source, with 1000Ohms resistance = 120mAmps
How did the band AC/DC gain their name?
They saw it on the back of their older sister’s sewing machine.
Homes, usually 60Hz
Energy = I2 x R x time
Energy = (V2 x time) / R
Therefore the heating of tissues increases according to the square of the applied voltage, and is directly proportional to the time the voltage is applied.
Power Line: 7620V
Lines outside house: 220 / 240V
High Voltage Injury
Low Voltage Injury
What was AC/DC’s first album?
What is considered high voltage?
Downed Power Lines
Bailey et al. (2000). Experience with guidelines for cardiac monitoring after electrical injury in children. Am J Emerg Med; 18(6):671-5.
What do you do?
How long do you continue treatment?
Thoughts . . .
Conclusion . . .
Tampa Bay Lightning
Lightning Crashes – Live
Usain “Lightning” Bolt
Indications for CT:
Spinal Cord Injuries
You are working at Foothills one stormy afternoon, and there is a soccer game going on at McMahon Stadium . . .
You get a patch . . .
Thanks also to Marc Francis and James Huffman for pictures and cases!