Resuscitation devices are medical tools designed to restore breathing and circulation in individuals experiencing cardiac arrest or respiratory failure. Common types include automated external defibrillators (AEDs), which deliver electric shocks to the heart, and bag-valve masks, which help provide oxygen to patients who are not breathing. These devices are crucial in emergency situations, as they can significantly increase the chances of survival. Training in their use is often provided to first responders, healthcare professionals, and even the general public to ensure timely and effective assistance during critical moments.