A method and a medical instrument are disclosed. The medical instrument has a first part comprising an attachment section and a second part comprising one or more functional sections. The medical instrument comprises an identification tag being positioned within the attachment section, and a cover material forming a tube body having at least two openings including a first opening and a second opening. The cover material encloses the identification tag and the attachment section. The first part extends through the first opening and the second opening. The first opening and the second opening are occluded by the first part.