BENNETT FRACTURE 

Bennett fracture is an intraarticular two-part fracture of the ulnar side of the base of the first metacarpal often sustained when punching a hard object. Here's a quick summary. 

• Intraarticular two-part fracture of the ulnar side of the base of the first metacarpal 

• The ulna portion of the base of the thumb remains in place, whereas the longer radial fragment subluxes or dislocates due to the pull of the abductor pollicis longus muscle 

• Associated complications occur late and include stiffness, arthritis and malunion 

• Mechanism: Axial force applied to the thumb in flexion (blow with the fist) 

• Exam: Swelling and tenderness at the base of the thumb with limited range of motion 

• ED Management: Pain control, immobilize 

• Splint: Thumb spica 

• Ortho consult: No, if <1 mm displacement; Yes, if >1 mm displacement 

• Disposition: Discharge home with close orthopedic follow-up within the next 2-3 days as these fractures often require operative management 



MH/CCF/CWRU EM Res @MetroHealth_EM



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