不同机制组合在走路和抬腿过程中对支架和下肢之间滑动的影响
Yuzhou Yan1, Ruitao Gong1, Mengzhao Cao1
1Innovation Center of Bioengineering, Shaanxi Engineering Laboratory for Transmissions and Controls, Northwestern Polytechnical University, Xi'an, Shaanxi, P.R. China.
概括
新的膝盖支架设计显著减少支架的滑动,提高治疗效果. 侧面四条连接和中间非圆形轮组合显示出在运动过程中滑动的最大减少.
科学领域:
- 生物医学工程 生物医学工程
- 整形外科 整形外科 整形外科
- 生物力学 生物力学
背景情况:
- 膝关节支架对于膝关节的支持和功能至关重要.
- 由于错位而导致支架的滑动会降低治疗效果,并导致患者不坚持支架.
- 研究机制组合对于优化支架性能至关重要.
研究的目的:
- 为了评估不同机制组合对膝盖支架滑动的影响.
- 为了确定最大限度地减少支架位移的最佳机制组合.
- 评估机制组合对膝盖运动范围的影响.
主要方法:
- 设计了一种实验性膝盖支架,具有四种侧向/中向机制组合:单轴 (SA),超级轮 (SG),四条连接 (FL) 和非圆形轮 (NCG).
- 十名健康的参与者执行了行走和抬腿的任务.
- 用惯性测量单位测量膝盖曲,用3D运动捕捉系统量化支架滑动.
主要成果:
- 与SA组合相比,所有测试的机制组合都显著改变了峰值滑动 (p < 0.05).
- 侧侧FL和中间NCG组合显示出最低的峰值和最后的滑动,减少大腿滑动高达85.3%,腿部滑动高达72.0% (p < 0.05).
- 选择的机制没有显著影响膝盖的运动范围 (p > 0.05).
结论:
- 与膝盖即时旋转中心保持一致的机制组合显著减少了支架的滑动.
- 侧面的四条连接和中间非圆形轮组合提供了卓越的性能,最大限度地减少膝盖支架位移.
- 优化机制设计是提高膝关节支架有效性和患者合规性的关键.
更多相关视频
06:35Using Gold-standard Gait Analysis Methods to Assess Experience Effects on Lower-limb Mechanics During Moderate High-heeled Jogging and Running
Published on: September 14, 2017
9.1K
05:52Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds
Published on: August 25, 2020
4.5K
相关概念视频
01:24Wedges
1.1K
A wedge is a simple machine that serves various purposes, such as adjusting the elevation of structural or mechanical parts, providing stability for heavy objects, and splitting a body into two parts. This versatile tool can amplify an applied force, making it easier to manipulate large or heavy objects.
Consider using a wedge to lift a heavy slab. Here, the wedge functions by converting the applied force into a much larger force directed almost perpendicular to the initial force. This...
Consider using a wedge to lift a heavy slab. Here, the wedge functions by converting the applied force into a much larger force directed almost perpendicular to the initial force. This...
1.1K
01:05Static and Kinetic Frictional Force
15.8K
One of the simpler characteristics of sliding friction is that it is parallel to the contact surfaces between systems, and is always in a direction that opposes the motion or attempted motion of the systems relative to each other. If two systems are in contact and moving relative to one another, then the friction between them is called kinetic friction. For example, kinetic friction slows a hockey puck sliding on ice.
However, if two systems are in contact and are stationary relative to one...
However, if two systems are in contact and are stationary relative to one...
15.8K
01:21Characteristics of Dry Friction
562
Dry friction occurs when two solid surfaces slide against each other without any lubrication or fluid present. It causes resistance when pushing objects along a surface, like a gardener pushing a wheelbarrow. The force applied to move the cart causes dry friction between the wheel and the ground.
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
562
01:10Relative Motion Analysis - Acceleration
353
A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
353
01:27Types of Friction Problems
534
Friction is an essential concept in physics, engineering, and everyday life. It is the force that opposes the relative motion or tendency of such motion between two surfaces in contact. One of the most common types of friction encountered in various applications is dry friction. Dry friction problems can be broadly categorized into three types, each with unique characteristics and challenges.
The first type of dry friction problem involves situations where there is no apparent impending motion....
The first type of dry friction problem involves situations where there is no apparent impending motion....
534
01:18Static Friction
760
Static friction is a force that opposes the relative motion or tendency of motion between two surfaces in contact. It plays a crucial role in our daily lives, from walking on the ground to driving a car.
For example, consider a scenario where a truck is connected to a car by a rope, ready to tow it along a road. When no external force is applied by the truck, the car remains stationary and is said to be in static equilibrium. In this case, the forces acting on the car, such as gravity and the...
For example, consider a scenario where a truck is connected to a car by a rope, ready to tow it along a road. When no external force is applied by the truck, the car remains stationary and is said to be in static equilibrium. In this case, the forces acting on the car, such as gravity and the...
760