PHOENIX -- Many of those injured in Monday's Boston Marathon bombing suffered shrapnel wounds. Surgeons were forced to perform numerous amputations.
Medical expert Dr. Art Mollen spoke to Kaley O'Kelley about how injuries like that are treated, and how doctors deal with a mass catastrophe like Monday's.
"Emergency room doctors, they often don't see bombing victims," says Dr. Mollen. "So when you have patients coming in with amputations and shrapnel injuries and abdominal injuries and lacerations, and you have basically bone and skin that has been macerated, it's very difficult to take care of those injuries when you're not used to taking care of them."
Dr. Mollen says many of the injuries were in the lower extremities, including the legs and abdomen. "The bomb was on the ground," he says. "So runners had legs amputated, spectators had legs amputated, and they had abdominal injuries as well. And that causes massive tissue and bone degradation."