Compression Feedback for Patients With In-hospital Cardiac Arrest

The Cardio First Angel™ (CFA; INOTECH, Nubberg, Germany) is a handheld device consisting of three components. The rescuer-side has a red palm-sized push-button with a pictogram illustrating proper use. The center unit is composed of a stable plastic base containing an arrangement of springs, and the patient-side consists of liquid-absorbent polyurethane foam. Application of 400 ± 30 Newtons of force results in an audible click alerting the rescuer to cease compression, and an additional click on decompression alerts the rescuer to resume compression.

Cardiopulmonary resuscitation according to published international guidelines.