Since laparoscopy was first used in cholecystectomy in 1987, it has developed quickly and has been used in most fields of traditional surgery. People have now a
Lower gastrointestinal bleeding(LGIB) is an important worldwide cause of morbidity and mortality in the elderly.The incidence of LGIB increases with age and cor
Narrow band imaging(NBI) is a new image enhancement system employing optic digital methods to enhance images of blood vessels on mucosal surfaces,allowing impro