Voice advisory manikins and other devices that provide automated feedblack on performance can be effective CPR training tools,useful in refreshing skills and potentially helpful in improving the quality of CPR performance. Acceptable limits regarding compressions and ventilation are preset in these manikins,which assess CPR performance and deliver corrective audio or visual feedblack.If the compressions are too shallow,for example ,the manikin will tell the learner to compress deeper,or it will display the compression depth on a screen ,providing real- time visual feedblack to guide performance.
Skorning and colleagues test a new visual feedblack devices for its effect on the depth and rate of chest compressions. This small device is placed between the chest of the victim and the palm of the responder and provides feedblack regarding compression depth and rate on a color disply.Of the 93 health care providers who participated in the study,45.2% achieved correct compression depth on a manikin without the device ;when training with the device in place,this percentage increased to 73.1%(P