Insufficient inflation of electronic sphygmomanometer is mostly caused by machine failure, insufficient voltage, improper operation, etc., which need to be dealt with according to the specific situation. Machine failure: Mostly due to the connection of electronic sphygmomanometer, airbag and other parts of the aging, damage, etc., the sealing has been damaged, there is a leakage of air, which leads to under-inflation, you can replace the damaged parts, or use tape to seal the leakage parts. Insufficient voltage: the inflation process of the electronic sphygmomanometer requires sufficient voltage, if the battery power is insufficient, the wire is damaged, etc., which may lead to insufficient voltage to complete the inflation process, the electronic sphygmomanometer is insufficiently inflated, you can replace the battery or replace the plug. Improper operation: If the strap is tied too loosely during the measurement process, resulting in too large a gap between the measurement site and the strap, which exceeds the expansion range of the airbag, or if the person to be measured moves the measurement site during the measurement process, under-inflation can also occur and cannot be measured properly. When measuring blood pressure, the cuff should be brought to two horizontal fingers above the elbow socket, and a gap of about two fingers should be retained when tying, while resting in a quiet state for 15 minutes before taking the measurement.