[A design and application of electrocardiograph without lead wire for first-aid]

The electrocardiograph is used to record the bioelectric signals generated by the activation of myocardium when the heart is active. It is a commonly used medical electronic instrument for clinical diagnosis and first-aid. However, electrocardiograph adopts a lead wire connection method in existing technology, which is prone to interweaving of wires during movement. It will not only break and wear the lead wire, but also delay the treatment time due to the cleaning of the lead wire. In addition, because the battery capacity is small, it needs to be charged frequently after use, which affects the speed of the instrument use and first-aid. Moreover, the original adsorbed chest lead electrode has a small contact surface with the skin, leading to less comfort and easy to fall off. In order to solve the above problems, an electrocardiograph without lead wire for first-aid was designed by medical staff of Tianjin First Central Hospital, and the National Utility Model Patent of China was obtained (Patent No.: ZL 2019 2 2267837.3). The electrocardiograph adopts the method of wirelessly connecting electrodes, avoids entanglement of lead wire, and increases the portable power source, which prolongs the battery endurance time, improves the contact electrode performance of chest lead and increases the contact surface, the above improvements optimize the medical process operated by medical staff, which is more conducive to clinical first-aid and routine examination, and has the advantages of easy to use, easy to carry and strong safety.