组合式防旋髓内针的研制及力学分析  

STUDY AND MECHANICAL ANALYSIS OF COMBINED ANTIROTATION INTRAMEDULLARY NAIL(CAIN)

作　　者：李健民[1,2,3] 华筑信[1,2,3] 胥少汀[1,2,3] 李铁防 姜金卫 

机构地区：[1]北京军区总医院骨科 [2]河北大学数学系 [3]北京安贞医院骨科

出　　处：《中国生物医学工程学报》1998年第1期81-87,共7页Chinese Journal of Biomedical Engineering

摘　　要：股骨干中下及下１／３部位的骨折使用传统的Ｋｕｎｔｓｃｈｅｒ针无法控制骨折端旋转，而内锁髓针（Ｉｎｔｅｒｌｏｃｋｉｎｇｎａｉｌ）又由于所需设备昂贵及手术困难等原因，使推广受到限制。为此我们设计了由内外针组合而成的组合式防旋髓内针。生物力学试验表明，该针有足够的强度承受骨折部位的弯矩和扭矩，并且外加扭矩在侧刃上均匀分布，避免了内锁针的应力集中现象。临床治疗４６例股骨干中下及下部骨折，平均随访３４．５个月，优良率达９７．８％。AIN was designed by the authors and it was composed of two parts, the inner nail and the outer nail. The biomechanical experiments showed: (1) The stiffiness of CAIN was enough to resist the bending and twisting moments at the site of the fracture and (2) The twisting moment was transmitted evenly to both side edges, thus avoiding the concentration of the stresses. From Jan 1992 to May 1993, 45 cases (46 femurs) with fractures of distal half of femoral shaft were treated by CAIN and were followed up for an average of 34.5 months. The excellent rate was 97.8%.

关 键 词：内锁式髓针 组合 防旋髓针 力学 骨折 内固定 

分 类 号：R683.08[医药卫生—骨科学]