2Diana MW. Laparoscopic Surgery: An excellent approach in elderly patients[J]. Archives of surgery,2003, 138(10): 1083-1088.
3Firilas A, Duke BE, Max MH. Laparoscopic cholecystectomy in the elderly[J]. Surg Endosc, 1996, 10(1): 33-35.
4Kopernik G,Avinoach E,Groisman Y.The effect of high partial pressure of carbon dioxide environment on metabolism and immune function of human per cells relevance to carbon dioxide pneumoperitoneum[].American Journal of Obstetrics and Gynecology.1998
5Wolf JS Jr,Clayman RV,Monk TG.Carbon dioxide absorption during laparoscopic cholecystectomy[].Journal of the American College of Surgeons.1995