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The "Fixed" model refers to the calibrated spring tension in the chest. It provides the exact resistance required to mimic an adult human sternum. This ensures students do not develop "lazy" compression habits. Durability and Longevity

Failing to allow full recoil stops blood from refilling the heart.

The underlying causes vary, but the most common triggers include:

Headline: Precision in Emergencies: Why Mechanical CPR is Changing the Game

Once activated, built-in voice prompts walk the responder through both chest compressions and defibrillation steps.