Scene size-up: Checking for severe life-threatening bleeding is now part of the initial impression within the scene size-up to provide care in a more timely manner.
Checking for responsiveness: To check for responsiveness, responders should use a "shout-tap-shout" sequence - first shouting to determine resonsiveness, then tapping the shoulder of and adult or child (or the foot of an infant) to elicit a response, and then shouting again.
Primary assessment: Breathing and pulse check occur simultaneously during the primary assessment. This check should take at least 5 seconds, but no more than 10 seconds.
Learn more in our BLS for Healthcare Providers Class.