10/19/2026
Why does 1 second matter when you squeeze a BVM?
Same 500 mL. Different breath.
Squeeze it over 1 second and flow peaks near 50 L/min.
Rush it in half a second and flow peaks near 100 L/min.
Average flow is volume divided by time, so 30 vs 60 L/min. But a hand squeeze speeds up and then slows down, so the peak runs higher than the average.
Higher peak flow means higher peak airway pressure. That can push air into the stomach, injure the lungs and potentially cause a pneumothorax or pneumomediastinum.
The 2025 AHA Guidelines say it may be reasonable to give each breath over 1 second for adults in cardiac arrest without an advanced airway. They list both too little and too much ventilation as Class 3: Harm.
SotairIQ™ shows inspiratory time, peak flow, pressure and volume on every practice breath, so providers can see their 1 second instead of guessing it. On the real bag, Sotair® controls the flow rate of every breath as it is delivered.
Swipe for the takeaway.