A blood pressure pulse wave measuring device, abbreviated as CAVI, is used to check the age of blood vessels and the hardness and clogging of blood vessels. It's an unfamiliar test, but I lie on the bed for about 5 to 10 minutes with a sphygmomanometer wrapped around both hands and feet, electrodes attached, and a sound collector attached to the chest to pick up the sound of the heart. It's just the end. There is no particular pain.