Brachial_Plexus_Injuries

Question 1

Brachial Plexus Injury Epidemiology

Answer 1

Complete involvement all roots - 75%-80% traumatic BPIs
C5 & C6 upper trunk - 20-25% (Erb’s)
C8, T1 lower trunk - 0.6-3% (Klumpke’s)

Question 2

Brachial Plexus Injury Mechanism

Answer 2

High speed MVA/MCA (mostly MCA) 83%
Causally forced shoulder - upper brachial plexus
High energy all roots
Forced arm abduction - lower roots - grabbing onto something while falling