REMSTARBC.ca    Rural Emergency Medicine Simulation Training and Resource - British Columbia

Traumatic Cardiac Arrest is different that non-traumatic cardiac arrest.
The most important time for intervention for survival is within the first 10-15 minutes post incident.
This usually means 'in the field' as these patients are usually more than 15 minutes from hospital care.

Below is a short Youtube video outlining the issues with Traumatic Cardiac Arrest and the differences with non traumatic cardiac arrest.