Specialized devices for fixing thoracic electrodes in newborns and children weighing up to 4000 g have been developed. The devices are offered in 3 versions: for children weighing up to 2000 g, from 2000 g to 3000 g and from 3000 g to 4000 g. The devices allow high-quality, stable and safe fixation of thoracic electrodes on the chest of a child, including low body weight.