A CPR mask is a device used to deliver rescue breaths during a cardiac arrest or respiratory arrest safely. The mask has a built in disposable one-way filter valve which lets the air from the rescuer deliver to the patient while any substances from the patient (eg. vomit, blood) cannot reach the rescuer. After each use of the mask, the filter is replaced. Image File history File links Download high resolution version (2484x1719, 776 KB) A CPR/Artificial respiration mask. ... Image File history File links Download high resolution version (2484x1719, 776 KB) A CPR/Artificial respiration mask. ... Respiratory arrest is the cessation of the normal tidal flow of the lungs due to paralysis of the diaphragm, collapse of the lung or any number of respiratory failures. ... ...