To find out which instrument can be much better for laparoscopic gastrectomy among Harmonic scalpel, Ligasure Maryland, Thunderbeat~comparing postoperative CRP level in each group~post operative 2nd day CRP level~post operative 4th day CRP level~post operative IL-6, 10 level in 2nd, 4th day
To find out which instrument can be much better for laparoscopic gastrectomy among Harmonic scalpel, Ligasure Maryland, Thunderbeat~comparing postoperative CRP level in each group