Even the familiar BVM (Bag-Valve Mask) might have many surprising aspects. Do you know anyone like that? (←What are we talking about?)
If you haven't seen the first half of the quiz, please check it out here↓↓↓
【救急クイズ】意外に知らないバッグバルブマスク[BVM]用手換気クイズ(前編)【QQ...

0:24 Q6 How do you push the bag?

1:21 Q7 What are the predictors of ventilation difficulty?

2:54 Q8 What to do when SpO2 doesn't rise well?

7:07 Q9 What to do when spontaneous breathing begins?

8:28 Q10 One-person method? Two-person method?

🎥 Related Videos
Check out how to use a BVM here ↓
"Bag-Valve Mask [BVM] User Guide"
バッグバルブマスク[BVM]の使い方虎の巻【ICLS、ACLS】

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《Note》
・While the reservoir is properly called a reservoir bag, it is also referred to as a reservoir in the video to avoid confusion with the bag that you press.
・This video aims to cover the key points of the BVM, and the quiz is just a bonus. The quiz questions have some shortcomings, such as intentionally omitting details. We would appreciate it if you would not complain or get angry about the way the quiz is presented.
・Even with proper ventilation, air can still enter the stomach.
・Minimizing interruptions in chest compressions is also very important.
・Q8 is posed on the premise that you are properly ventilating with the mask. Even if oxygen is being delivered properly, there may be a time lag before SpO2 rises, so if it's immediately after, the answer is to wait a little while. If there is another cause, we will respond immediately.
Depending on the patient's condition, we may slightly increase the ventilation volume.
As mentioned in the latter half of the video, after the bag is removed, the oxygen that is constantly flowing is stored in the reservoir and the rest is released, but some of it enters the bag and comes out from the mask side.
The explanation of airflow during ventilation in this video does not take the patient's spontaneous breathing into consideration. When there is spontaneous breathing, synchronize with the spontaneous breathing.
There are parts where the expression "oxygen + air" is used, but of course, air also contains oxygen.
When performing mask ventilation, oral airways or nasal airways may also be used.
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References
Everyone's Airway Management, Volume 1 / Takashi Asai
Guaranteed Victory! Airway Management Techniques: Don't Miss the ABCs / Takashi Shiga, Hiroyuki Hayashi
and others

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