<prompt> What is flail chest?Fracture of three or more ribs at 2 or more placesFracture of 2 ribs at three placesVentilator associated pneumoniaTransfusion associated lung injury  <response>: Ans. a Fracture of three or more ribs at 2 or more placesRef: Bailey 26th edition Page 355 Flail chest is defined as three or more ribs fractured in two or more places 