Benefit: When you perform first aid on a patient with less than 0 hit points, they gain enough temporary hit points to raise their total to 0. These temporary hit points last for one minute. If the loss of these temporary hit points brings the patient below 0 hit points, they are automatically stable. In addition, you gain a +2 competence bonus on Heal checks.
Section 15: Copyright Notice – Adventuring Classes: A Fistful of Denarii