 For conscious victims, the new guidelines (nicknamed "the five and five"), recommend first applying five backblows; if this method fails to remove the airway obstruction, rescuers will then apply five abdominal thrusts.For unconscious victims, the new guidelines recommend chest thrusts, a method first recommended in a 1976 study by Charles Guildner, with results duplicated in a year 2000 study by Audun Langhelle.The 2006 guidelines also eliminated the phrase "Heimlich maneuver" and replaced it with "abdominal thrust".