Complete excision of the left gastroepiploic mesentery and complete dissection the No.4sb lymph nodes is the entrance and one of important steps of splenic hilar lymph node dissection. 4K laparoscopy has a higher level of surgical vision and more subtle degree of local anatomical recognition.Following the concept of mesentery anatomy and with the help of the unique advantages of 4K laparoscopy, the lymph node dissection of left gastroepiploic region is more thoroughly, the operation time is shorter, and there is no bleeding or micro-bleeding. At the same time, the maximum protection of the surrounding important organs and blood vessels, can further improve the radical and safety of the operation. The authors investigate the lymph node dissection along the left gastroepiploic vessels region from intermediate approach in 4K laparoscopic radical gastrectomy.

将实验室试制的禽流感细胞灭活疫苗(H9亚型,F株) (批号:201201、201202)通过颈部皮下注射的方式单剂量、单剂量重复、超剂量接种10日龄SPF鸡进行安全性试验.免疫后连续监测15天,每周称重,用t检验分析对照组和免疫组体重之间的差异显著性.试验结果表明,免疫接种组和空白对照组体重差异不显著,所制备的禽流感细胞灭活疫苗(H9亚型,F株)不影响鸡的生长性能,安全性良好.