Popular Science has listed a series of gadgets that promise a better help for the EMS callers. A selection:

Texas trauma surgeon James H. Duke developed a digital ambulance that lets doctors orchestrate treatment from the hospital. The Disaster Relief and Emergency Medical Services Interact ambulance transmits and receives vitals and video by switching among cellular, satellite and 802.11 networks. The system transmits patient information to the hospital, where ER docs see and hear everything through videoconferencing equipment and issue instructions to en route EMTs.

Northfield Lab’s PolyHeme is testing the first ambulance-friendly blood substitute. This fake blood has a 12-month shelf life and is compatible with any blood type. To brew it, chemists extract hemoglobin from human blood, remove the impurities, and then bind the cleaned-up molecules.
CoolSystems is testing a brain-cooling helmet filled with circulating ice water that absorbs heat to stave off brain damage. The hood lowers brain temperature 3°F in the first hour without significantly reducing core body temperature.