Through a process called suspended animation, doctors could put patients in a state of suspension between life and death. It would give doctors more time to fix life-threatening injuries, Gawker reports.
Gizmodo explains how it works. All the patient's blood is quickly removed from his or her body and replaced with saline solution, which slows down cellular activity. Doctors then have about two hours to fix the injuries and replace the saline with blood. The patient's heart should start up again with or without some help.
So patients are technically dead during that time. The FDA gave doctors at UPMC Presbyterian Hospital in Pittsburgh the OK to perform the procedure, but only on patients who are extremely likely to die from their injuries, such as gunshot wounds.
The Verge reports this procedure was tested on pigs in 2002 and some survived. But suspended animation is more controversial on humans because there wouldn't be enough time to get consent from the patients or their family.
New Scientist describes it as a "groundbreaking emergency technique" and says it will be tested initially on ten patients. Those patients will then be compared to other patients who did not receive the procedure.