operation level

Surgery can be divided into one to four levels, the first level of surgery is relatively simple surgery, surgical trauma is small, and recovery is fast; the second level of surgery includes breast mass resection, inguinal hernia repair, etc., the surgical steps are more complex than the first level, fewer complications; the third level of surgery is more difficult surgery, there may be complications; and the fourth level of surgery includes all kinds of tumor radical surgery, the operation difficulty is greater, the possibility of complications is higher.