Watch as John “Shrek” McPhee and Mike Voytko from SOB Tactical talk about how to react to and treat injuries while under fire. If you are still in the military, law enforcement, or if you are a concealed handgun carrier, this is a great video to watch. If you carry a concealed handgun or duty weapon regularly, also consider carrying a personal IFAK (individual first-aid kit) in your vehicle or on your person. You must have the your IFAK within reach when you need it the most. As John “Shrek” McPhee and Mike Voytko point out during the lessons learned, you have to be prepared to do self-aid until the threat is gone. If you and your team are still under fire, they may not be able to get to you.
Late response....but pertinent nonetheless. In TCCC or any form of tactical first aid, body armor needs to be removed to conduct a thorough yet expeditious assessment of the torso for obvious and insidious injuries that could still be fatal. As soon as you've done your assessment/treatment interventions, body armor goes back on.
As for disoriented or lucid status, it is always best to disarm someone. Too many risk factors and variables. Personal experience of mine.....LCPL on the turret gun had his vehicle hit an IED. He had his bell rung (concussion from the blast) pretty damn good. It was a night convoy/movement with other vics. As soon as he "came too," he started to open up w/ his 240 on the vehicles with obvious headlights in the convoy. Thankfully, nobody was hit and he was yanked off the gun quickly but this demonstrates that any form of altered mental status is not a good mix when it comes to firepower in their hands.