车身尺寸与4链ACLR移植体的直径之间的关系
1Department of Orthopaedics and Traumatology, School of Clinical Medicine, Li Ka Shing Faculty of Medicine The University of Hong Kong Hong Kong Special Administrative Region P.R. China.
Journal of experimental orthopaedics
|July 8, 2025
概括
这项研究开发了一个概率表,以根据患者身高和体重来预测成功准备双倍半状和双倍状 (ST×2 + G×2) 移植物用于前十字带重建 (ACLR). 这些发现有助于外科医生预测移植直径的可行性.
科学领域:
- 整形外科手术 整形外科手术
- 生物医学工程 生物医学工程
- 运动医学 运动医学
背景情况:
- 前十字带重建 (ACLR) 通常使用腿筋自移植.
- "双倍半和双倍" (ST×2 + G×2) 接种是一种四链结构.
- 移植直径是成功ACLR结果的关键因素.
研究的目的:
- 创建一个预测概率表,用于为ACLR准备ST×2 + G×2移植.
- 为了确定实现7mm和8mm的最小接种直径的可能性.
- 为了将移植准备成功与患者的身高 (BH) 和体重 (BW) 相关联起来.
主要方法:
- 对536名骨成熟的中国患者进行了回顾性分析,这些患者接受了腿筋摘取 (2008-2021年).
- 测量ST×2 + G×2的移植直径在0.5mm的增量.
- 基于5厘米的BH间隔和10公斤的BW增量开发一个概率表.
主要成果:
- 在99.1%的男性中,可以实现7mm的ST×2 + G×2移植.
- 准备一个7毫米的移植不是可行的女性<40kg.
- 8毫米的移植对男性<160厘米和<60公斤具有挑战性,但对女性>60公斤是可行的.
结论:
- 患者的性别,身高和体重显著影响ST×2 + G×2移植直径.
- 概率表有助于预测ACLR实现所需的移植直径的可行性.
- 这些数据有助于外科医生为腿筋自移植ACLR进行术前规划.
相关概念视频
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
Design of Transmission Shafts
The design of a transmission shaft is governed by two primary specifications: the power it transmits and its rotational speed. These parameters guide the selection of the shaft's material and cross-sectional dimensions, ensuring that the material's maximum shearing stress remains within the elastic limit while transmitting the desired power at the given speed. The system's power is intrinsically linked to the applied torque. The torque applied to the shaft can be calculated by reconfiguring the...
Transmission Shafts: Problem Solving
Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...
Next, use bending moment diagrams for the shaft to...
Transmission-Line Differential Equations
Transmission lines are essential components of electrical power systems. They are characterized by the distributed nature of resistance (R), inductance (L), and capacitance (C) per unit length. To analyze these lines, differential equations are employed to model the variations in voltage and current along the line.
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured from the...
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured from the...
Logarithmic Differentiation
When a car’s weight and driving forces act on a tire, they impose an external load on the rubber material. This load is resisted internally by forces distributed throughout the tire structure, which are defined as stress. The resulting deformation of the rubber due to this stress is quantified as strain. The relationship between stress and strain governs how the tire deforms under load and is central to understanding its mechanical response during operation.Rubber exhibits a nonlinear...
Arc Length of a Curve: Problem Solving
A high-voltage power line spans a 40-meter horizontal distance between two transmission towers, resulting in a 10-meter vertical sag due to the effects of gravity and thermal expansion. The curve formed by the suspended cable is a catenary, which accurately models the behavior of a uniform, flexible cable under its own weight. Unlike a parabolic shape, the catenary is described by the hyperbolic cosine function and offers a precise representation of the cable's form.In this setup, engineers...


