American Red Cross BLS Lesson 3 PreExam Assessment *Q&A* |Verified Study
Set| 2025/2024
What is the primary focus of Basic Life Support (BLS), and why is it critical in emergency
situations?
The primary focus of BLS is to maintain effective circulation and oxygenation in victims of
cardi...
American Red Cross BLS Lesson 3 Pre-
Exam Assessment *Q&A* |Verified Study
Set| 2025/2024
What is the primary focus of Basic Life Support (BLS), and why is it critical in emergency
situations?
The primary focus of BLS is to maintain effective circulation and oxygenation in victims of
cardiac arrest or respiratory failure. This is critical because timely intervention can prevent brain
damage and increase the likelihood of survival until advanced medical help arrives.
In a suspected cardiac arrest scenario, what steps should you take immediately upon discovering
an unresponsive victim?
First, check the victim for responsiveness by gently shaking their shoulders and shouting. If
there is no response, call for emergency medical services (EMS) or ask a bystander to do so, then
begin CPR immediately.
How long should you check for a pulse in an unresponsive adult before deciding to start CPR?
You should check for a pulse for no more than 10 seconds. If there is no pulse or you are
unsure, start CPR immediately, as the lack of a pulse indicates the heart is not effectively
circulating blood.
What is the correct compression depth for adult CPR, and why is this depth important?
1
, The correct compression depth for adult CPR is at least 2 inches (5 cm). This depth is
important because it allows for adequate compression of the heart, enabling effective blood flow
to vital organs during the absence of a heartbeat.
What is the recommended compression rate during CPR, and how can you ensure that you
maintain this rate?
The recommended compression rate during CPR is 100 to 120 compressions per minute. To
maintain this rate, you can use a metronome or mentally keep the rhythm of a song like "Stayin'
Alive" by the Bee Gees, which has the right tempo.
How do you ensure an open airway for rescue breaths when providing care to an unresponsive
victim?
To ensure an open airway for rescue breaths, perform the head-tilt, chin-lift maneuver. Place
one hand on the victim's forehead and use your other hand to lift the chin, which helps to clear
the airway and allows for effective breaths.
What is the correct compression-to-breath ratio for adult CPR when performed by a single
rescuer, and why is it structured this way?
The correct compression-to-breath ratio for adult CPR performed by a single rescuer is 30
compressions to 2 breaths. This ratio is structured to provide a balance between maintaining
circulation through compressions and delivering oxygen to the lungs via rescue breaths.
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