"Annie" is a common nickname for Resusci Anne, a CPR training manikin developed by Laerdal Medical. It's a model used for teaching CPR and basic life support to both professionals and the general public. The face of Resusci Anne is based on the death mask of "L'Inconnue de la Seine" (the unknown woman of Seine), an unidentified young woman who was believed to have drowned in the Seine River around the late 1880s.

Here's a more detailed breakdown:

History:

The first Resusci Anne was introduced in 1960, developed by Laerdal Medical in collaboration with physicians Peter Safar and James Elam.

Purpose:

The manikin was designed to provide a realistic and effective way to practice chest compressions, mouth-to-mouth resuscitation, and other CPR techniques.

Impact:

Laerdal Medical estimates that 300 million people around the world have been trained in CPR with the help of Resusci Anne.

Face:

The face of Resusci Anne, often referred to as "Annie," is a famous death mask of an unidentified young woman who was believed to have drowned in the Seine River. The woman's face was chosen because it was seen as having a serene expression, which some found suitable for a training aid.