Tired of getting holes in your chest cavity? So were we. Our innovative design provides 4 vented channels designed to prevent airflow into the chest cavity during inhalation while allowing air to escape through the vent channels during exhalation. The 4 vent channels are designed to allow blood to escape and also provide a backup fail-safe system, as even if three of the four channels become obstructed, the vent is designed to remain fully operational.
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