Cardiac Science pads are adult pads to be used on Sudden Cardiac Arrest (SCA) patients over 8 years of age and over 55 pounds. Because these are pads to be used for adults, it’s important to keep a set of pediatric pads next to every AED defibrillator in the case that a child has an SCA medical emergency. SCA can happen to any person- child or adult. It is highly suggested to always have a spare set of replacement AED pads next to every Cardiac Science AED in the case that multiple persons need resuscitation or the electrode pad loses adhesion due to extensive moisture during an SCA. Cardiac Science AEDs expire after 2 years. In the case that they are used they need to be immediately replaced.