1[1]Anderson G, Harper N, Connolly C, et al. Preoperative skin traction for fractures of the proximal femur A randomized prospeetive trial[J]. JBJS (Br), 1993,75(5): 794 - 796.
2[2]Needoff M, Radfom P, Langstaff R. Preoperative traction for hip fracures in the elderly: a clinical trial[J]. Znjmy, 1993,24(5) :317 - 318.
3[3]Stromqvist B, Nilssonl, Eqund N, et al. Zatracapswlar pressure in undisplaud fraetures of the femoral neck [ J]. JBJS(Br) ,1988,70(2): 192 - 194.
4[4]Finsen V,Borest M, Bnvik G,et al. Preoperutive traction in patients with hip fracture[J]. Znjmy, 1992, 23 (4): 241 ~244.