两种改良型Harrington棒的应力分析  

Stress Analysis of two Kinds of Improvement Harrington Rods

作　　者：张西正[1] 匡震邦[2] 罗卓荆[3] 

机构地区：[1]西安交通大学生物力学研究室 [2]上海交通大学力学系 [3]第四军医大学西京医院骨科

出　　处：《北京生物医学工程》1998年第2期94-99,共6页Beijing Biomedical Engineering

摘　　要：作者对Ｈａｒｒｉｎｇｔｏｎ棒加Ｅｄｗａｒｄｓ套棒（ＨＲＳ）和Ｃ型Ｈａｒｉｎｇｔｏｎ棒（ＨＲＣ）两种改良型Ｈａｒｒｉｎｇｔｏｎ棒进行应力分析，确定出棒体的危险截面和危险点。通过理论分析和光弹模型试验表明：在受伤脊柱复位程度相同的条件下，ＨＲＣ棒在棘齿根部的应力明显低于ＨＲＳ棒。从而提示临床，采用ＨＲＣ棒治疗脊柱压缩性骨折，在获得与ＨＲＳ棒相同的复位效果时，可减少Ｈａｒ－ｒｉｎｇｔｏｎ棒从棘齿根部断棒的现象，提高手术的成功率。We analyzed the stress state of Harrington rod with Edwards sleeve (HRS) and Harrington rod of C type (HRC), and determined its dangerous cross section and dangerous point. Through theoretical analysis and photoelastic model testing to confirm:In the case of the same reduction degree of injured spine, the rack root stress of HRC is remarkably less than that of HRS. It is prompting clinic:To cure compression fractures of spine with HRS, broken situation can be reduced at the rack root of Harrington rod. Successful chances of the operation could be increased at reduction degree which is the same as HRS.

关 键 词：HRC棒 HRS棒 复位 脊柱骨折 应力分析 

分 类 号：R683.205[医药卫生—骨科学] R318.01[医药卫生—外科学]