cardio pump:Draw up Silicone vacuum cup,Chest expansion resulting in negative pressure AM-CP                        Draw up Silicone vacuum cup,Chest expansion resulting in negative pressure, venous blood        returning from the atrium to the ventricle via the lungs to exchange oxygen faster   Specifications                   1.Patent design2.Improved handle design to reduce wrist force3.Positive / negative pressure display to ensure that the compression depth of 4-5   cm in      

cardio pump