The corpuls cpr is a device for electro-mechanical chest compressions within the framework of a cardio-pulmonary resuscitation. It uses a piston to deliver automated chest compressions, offering adjustable depth and rate, and can be synchronized with the corpuls3 monitor/defibrillator for a seamless resuscitation process. The device is particularly noted for its single-arm design, which allows for unrestricted access to the patient's thorax during chest compressions. Intended use is by professional medical staff on closed thorax patients only.