I am actually quite surprised that the SGC hasn't assigned combat medics to each team yet; the military has them, so where are they for the SGC? I mean, it appears that the teams don't even really have members trained in basic medicine. I don't even see any of the off-world teams carrying first aid kits.
Rather, they either haul the person back through the gate (often unneccesary) or bring Janet through. Like Hatshepsut said, Janet was CMO; not a combat medic. It makes me wonder if she had even been carrying a gun or weapons, or exactly how close the other soldiers were standing and firing from. You'd think they'd put up a barrier around the wounded guy to protect him; I was really surprised when he was just lying around in the open with no one around and not even a hastily erected barrier. He should have been dead many times over if there were as many Jaffa around as were implied, just lying out in the open like that.