Mk, actually, a key point being missed here is that First Aid does not bring you up to 1.
You may use First Aid on any creature that you may use the skill Healing Arts on, and it only has an effect if the creature is Dying. If it is not Dying, nothing occurs. If it is Dying, then its Bleed Out Count freezes during the time that First Aid is being applied. After the minute needed to complete First Aid, the creature is now Unconscious. Unconscious is a state that a creature can be in. It means that the creature has 0 body and is not conscious. The Unconscious state lasts for 10 minutes so long as nothing interferes with it (taking damage, a healing spell, or something of the sort). Once those 10 minutes are up, the Unconscious effect ends, and you are now Alive with 1 body.
~Matt