Resuscitation is the act of bringing a friendly player in the incapacitated state back to "life". To do this a player must possess both the Medical Kit and the Resuscitate skill. Once the Medical Kit is equipped players will be able to see other incapacitated teammates at certain ranges and can also see incapacitated squad mates at any distance.
A resuscitated player will be returned to life in the same location as they died, with the same amount of ammo/ equipment as when they died and with a percentage of health corresponding to the extent of progress the resuscitator has made down the Resuscitate branch of the Medical tree.
As of patch 1.06, normal Resuscitation awards 5 xp per resuscitation, and Improved Resuscitation gives 10 xp per resuscitation.