Objective: To introduce an internal fixation of the latest design for peritrochanteric fracture(PF), a new device for clinical application, called Bi-axis Sliding Instrument(BSI);

• 目的：介绍一种设计新颖治疗股骨转子部骨折的双轴滑动内固定器(Bi-axis Sliding Instrument, BSI)，为临床治疗股骨转子部骨折提供一个新的内固定法；