BLS BLS High-Quality CPR & Provider Skills 2

Question 1

When delivering breaths with a bag-mask device during CPR, what tidal volume is recommended?

Accepted Answer

Enough volume to produce visible chest rise

Answer

The maximum volume the bag can deliver per squeeze

Answer

Exactly 500 mL regardless of chest rise

Answer

Whatever fully inflates the patient's lungs

Question 2

The E-C clamp technique for bag-mask ventilation refers to:

Accepted Answer

Using the thumb and index finger (C-shape) to seal the mask and the remaining fingers (E-shape) to lift the jaw

Answer

Squeezing the entire bag with a full fist grip

Answer

Applying cricoid pressure with two fingers while a partner ventilates

Answer

A 2-handed thumbs-down grip on the bag for stronger delivery

Question 3

For 2-rescuer BLS in a child (not a newborn or adult), what is the correct compression-to-ventilation ratio?

Accepted Answer

15:2 — allowing more frequent breaths for the pediatric patient

Answer

30:2 — same as adults regardless of number of rescuers

Answer

30:1 — reduced ventilations to prioritize compressions

Answer

5:1 — the traditional pediatric ratio

Question 4

How do you confirm that bag-mask ventilation is effective during CPR?

Accepted Answer

By observing visible chest rise with each delivered breath

Answer

By counting the number of breaths delivered per minute

Answer

By continuously monitoring oxygen saturation with a pulse oximeter

Answer

By listening for bowel sounds to rule out gastric inflation

Question 5

Why is over-ventilation harmful during CPR?

Accepted Answer

It raises intrathoracic pressure, reducing venous return and cardiac output during CPR

Answer

It causes rapid rescuer dehydration and fatigue

Answer

It triggers the vagal reflex and slows heart rate further

Answer

It depletes the oxygen supply in the bag-mask device too quickly

Question 6

Once an advanced airway is placed during adult CPR, what is the recommended ventilation rate?

Accepted Answer

1 breath every 6 seconds (10 per minute)

Answer

1 breath every 3–5 seconds (12–20 per minute)

Answer

1 breath every 10 seconds (6 per minute)

Answer

1 breath every 2 seconds (30 per minute)