Final answer:
To check for signs of circulation in an unresponsive child, check the carotid pulse for at least 5 seconds. If no pulse is found, proceed with CPR, prioritizing chest compressions and rescue breaths. An AED should be applied as soon as it is available.
Step-by-step explanation:
When you find the 7-year-old boy unresponsive and after delivering 2 effective rescue breaths, the next step you should perform to check for signs of circulation is: a) Check the carotid pulse for at least 5 seconds. This allows you to assess whether the heart is beating without the need to begin chest compressions immediately. It is important to note that when performing CPR, the current standards emphasize high-quality chest compressions, and checking for a carotid pulse is part of the process before starting compressions unless you’re trained and confident in giving rescue breaths. If no pulse is found within 5-10 seconds, you would then proceed to administer CPR using chest compressions and rescue breaths, typically at a ratio of 30 compressions to 2 breaths for a child. The applicability of an AED should also be considered as soon as possible if one is available.