Also known as: Collapsed lung
Mentioned by Cristina as a condition she hopes to treat among the train wreck victims, though not confirmed as an actual patient case shown in the episode.
Also known as: Leg amputation
Patient with guillotine amputation of the leg from the train accident. Dr. Webber and Cristina Yang work to reattach the leg, with plot complications around finding the correct matching limb.
Also known as: Rebar through spleen
Two train passengers impaled together on the same metal pole. The central ethical and medical dilemma of the episode involves deciding which patient to move off the pole to save. Bonnie has extensive aortic and spinal injuries and ultimately dies; Tom survives.
Also known as: Impalement near aorta
Bonnie's aorta is shredded by the impaling pole, leading to her death despite surgical intervention. This is the primary injury that makes her unsurvivable.
Also known as: Spinal cord damage
The T8 vertebra is completely crushed and the spine is severed by the impaling pole, causing paralysis. Bonnie cannot feel her legs.
Also known as: Third-degree burn
Third-trimester pregnant woman with burn injuries from the train wreck. Requires emergency C-section due to burns and fetal distress.
Also known as: Early labor
Third-trimester pregnant burn victim who requires emergency C-section due to fetal distress and maternal trauma from burns.
Also known as: Water breaking
Third-trimester pregnant woman whose water breaks after being in the train accident, leading to active labor.
Also known as: Broken rib
Train passenger with broken rib who is initially dismissed as a minor case, but dies from undetected internal bleeding.
Also known as: Internal bleeding
Undetected internal abdominal bleeding in a train passenger who appeared stable with only a broken rib. She bleeds internally for hours and dies suddenly, highlighting the dangers of missed diagnoses.
Also known as: Cut
Train passenger with facial lacerations requiring sutures, friend of Yvonne who dies from internal bleeding.
Also known as: Alcohol poisoning
Meredith arrives intoxicated after drinking at Joe's bar waiting for Derek. Bailey requires her to get a blood alcohol test and IV fluids before practicing medicine.