Smart Wearable Patch Signals Trouble Following Traumatic Injury

An ambulance pulls up to the site of a car accident, sirens blazing. Paramedics assess the crash victims, looking for signs of trauma, of which blood loss is a primary concern. But what about invisible trauma — internal hemorrhages that can cause the victim’s condition to rapidly deteriorate? For now, heart rates and blood pressure are crude measures for this, metrics that paint a…