Anatomical factors in lap/sash seat belt wearing : TARU 7/76

The compulsory use of lap/sash seat belts has improved crash protection of car occupants but belts do not always provide absolute protection and although they assist in prevention of severe injury to head and thorax, they can produce other injuries in some crashes. An investigation of anatomical aspects of lap strap fit is reported. Radiographic techniques were employed to determine the relative dispositions of the bony pelvic structure and of the seat belt. Examinations of surface anatomy were used to demonstrate the effects of changes in seat belt geometry. It is concluded that lap strap fit can be assessed from surface anatomy by a simple technique; that the most satisfactory seat belt geometry requires a lap strap to be steeply inclined when viewed from the side; that the existing ADR specification of seat belt geometry should be revised on the basis of locations of anatomical landmarks.\n\n**Note:** This resource was originally published on opengov.nsw.gov.au. The OpenGov website has been retired. If you have any questions, please contact the Agency Services team at [e-mail]\n\n**Agency**\n \n- Traffic Accident Research Unit (TARU)\n

强制配备腰带式/肩带式安全带可提升汽车乘员的碰撞防护效果，但安全带并非总能提供绝对防护。尽管其有助于降低乘员头部与胸部的重伤风险，但若遭遇部分碰撞场景，仍可能造成其他类型的损伤。本文报告了一项针对腰带式安全带贴合度的解剖学相关研究。研究采用放射成像技术，明确了骨性骨盆结构与安全带的相对位置分布；同时通过体表解剖学检查，阐明了安全带几何构型变化带来的影响。研究结论如下：其一，可通过简易方法基于体表解剖学特征评估腰带式安全带的贴合度；其二，最优安全带几何构型要求腰带从侧面观察时呈大倾角布置；其三，现行澳大利亚设计规则（Australian Design Rules, ADR）中关于安全带几何构型的规范，应基于解剖学标志点的位置进行修订。

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**负责机构**
- 交通事故研究单元（Traffic Accident Research Unit, TARU）