I watched the 'Neda' video several times over and come to the conclusion she was beyond help. Several items were significant...
In combat aid, with a chest wound, the most important assessment is whether either lung is damaged. From the location of the man's hand as he tried to stop the bleeding, Neda was probably a 'sucking chest wound' case. The ground below her looked awfully dark. Am %99.999 certain there was an exit wound and the swath of this 'dark' area seems to indicate rapid hemorrhage, even for oxygen enriched blood, which would be quite viscuous. I could be wrong. It could be just a dark patch of road asphalt. So if there was an exit wound and that Neda was lying on top of it, there was nothing anyone could do. As her heart continued to beat, plugging up one wound would just force the blood flow to the other wound, assisted by gravity as she was horizontal.
Neda's body movements seemed to me to be indicative of a shock. In Tae-kwon Do, I have been knocked out before and it is bizarre how one's body, especially the limbs, will react to such a trauma. Fighters have had broken wrists or even arms as they collapsed. Sometimes the limbs just stiffened up and received such damages on the way to the ground. Sometimes a fighter would just become like jelly and quite gently fell. It is unpredictable. Neda's body movement, especially her eyes and arms, to me, seems like she was already in shock from the bodily trauma of the bullet's impact.
What was most telling was when blood flowed from her nostrils and mouth. Sneezing and coughing are very violent reactions as the body tries to expel foreign objects from air passages. If the victim of a 'sucking chest wound' is able to cough, he is salvageable, to put it bluntly. The body is still strong and alert enough to try to save itself. The rescuers, if they are trained, would keep the head at the highest tilt angle and the upper torso slightly, may be two degrees, off horizontal. The goal is to keep any internal bleeding that goes into the lungs to 'pool' at the lowest level in the lungs. Cloth or preferably any piece of plastic would be used to plug the wounds to keep the lungs from collapse. Oxygen to the brain is critical at this time. If the victim continues to breath, even though with great difficulty, with short and shallow breaths, odds of survival greatly increases.
But nothing of that sort of bodily reactions occurred with Neda when the final scenes showed the blood flow from her nostrils and mouth. Probably her lungs had finally collapsed and the final exhale is called 'the death rattle'. Keep in mind that just like explosions, fluidic flow take the path of least resistance. That final exhale movement forced any blood in her lungs to fill the air passages and out her nostrils and mouth. The poor girl died in her shock.