Advance Cardiac Life Support is a set of interventions for the treatment of life threatening emergencies and the skills with knowledge to perform such interventions. The first link in this adult out of hospital chain of survival would be C. Recognition of the emergency and activation of EMS.
First I would find something to apply pressure to the wound. Secondly, I would check his or her pulse. A third I would call for help. I would most definitely not most this person, in the case you could make any possible injury they have worse.