3Sayfan J, Becker A, Koltun L. Sutureless closed hemor- rhoidectomy:a new technique [J]. Ann Surg, 2001,234 (1) :21-24.
4Festen S, Molthof H, van Geloven A, et al. Predictors oi recurrence of prolapse after procedure for prolapse and haemorrhoids[J]. Colorectal Dis, 2011,10(6) , 157-158.
5Nienhuijs SW,de Hingh IH. Pain after conventional ver- sus Ligasure haemorrhoidectomy. A meta-analysis[J]. Int J Surg,2010,8(4) :269-273.
6Milito G, Cadeddu F, Muzi MG, et al. Haemorrhoidectomywith Ligasure vs conventional excisional techniques:meta- analysis of randomized controlled trials [J]. Colorectal Dis, 2010,12 (2) : 85-93.
7Matthews BD, Pratt BL, Backus CL, et al. Effectiveness of the ultrasonic coagulating shears, LigaSure vessel sealer, and surgical clip application in biliary surgery:a compara- tive analysls[J]. Am Surg,2001,67(9) :901-906.
8Luo CH, Zang CB, Zhang GK, et al. Haemorrhoidectomy by vessel sealing system under local anaesthesia in an out- patient setting:preliminary experlence[J]. Colorectal Dis, 2010,12(3) : 236-240.
9Khanna R, Khanna S, Bhadani S, et al. Comparison of Li- ga sure Hemorrhoidectomy with Conventional Ferguson's Hemorrhoidectomy[J]. Indian J Surg, 2010,72 (4) : 294- 297.