Basic Life Support (BLS) Practice Exam

Which site is considered the best for checking the pulse of an unresponsive adult?

1. Radial artery

2. Popliteal artery

3. Brachial artery

4. Carotid artery

The correct answer is: Carotid artery

The carotid artery is the most appropriate site for checking the pulse of an unresponsive adult because it is located in the neck, making it easily accessible even in situations where the person is lying down or otherwise positioned in a way that might obscure other pulse points. In emergencies, the carotid artery is highly reliable for assessing the presence of a pulse because it is a large artery that can be palpated firmly against the cervical vertebrae. The radial artery, commonly used for taking a pulse in conscious individuals, may not be palpable in unresponsive patients due to potential variations in blood flow or positioning. The popliteal artery, located behind the knee, may be less accessible and also harder to palpate, especially in patients who are lying flat. The brachial artery, although used in infants and occasionally in adults, is more commonly employed for checking pulse in smaller individuals or when a blood pressure is being taken. Assessing the carotid pulse is a standard part of the assessment in Basic Life Support protocols, as it helps determine circulation effectively in emergency situations.