Final answer:
The significant difference in BLS for a choking victim lies in the technique used depending on whether the victim is conscious or unconscious.
Step-by-step explanation:
When performing Basic Life Support (BLS) for a choking victim, the significant difference lies in the specific technique used to clear the airway obstruction. For a conscious choking victim, the Heimlich maneuver is typically applied by delivering abdominal thrusts. This involves standing behind the victim, placing a fist just above the navel, and grasping it with the other hand before pulling inward and upward with quick, upward thrusts. On the other hand, if the victim becomes unconscious during a choking episode, CPR should be immediately initiated. During CPR, chest compressions are performed to maintain blood flow while additional cycles of attempted ventilation are made to try and clear the airway obstruction.