Flail chest is defined as
Flail chest : Fracture of two or more consecutive ribs, with each rib having two or more fracture sites. Such segment is called flail segment. Ref : SRB&;s 4thE pg:1196
Fracture of 3 or more ribs at 2 or more places
Fracture of 2 or more ribs at 2 or more places
Fracture of 2 or more ribs at one place
Fracture of multiple ribs at one place
Trauma