Described are overinflation and/or overventilation devices. The devices can include a body configured to attach to a resuscitation interface and a gas source, a subject metric input component disposed at the body, the subject metric input component configured to receive input specifying a metric associated with a resuscitation subject; and a volume control mechanism disposed within the body, the volume control mechanism configured to control a volume of gas provided by the gas source during a manual resuscitation that is communicated to the resuscitation interface based on the metric provided by the subject metric input component. Methods of using these devices are also included.