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🦿biomedical engineering ii review

key term - Above-knee prosthesis

Citation:

Definition

An above-knee prosthesis is a type of artificial limb designed for individuals who have undergone amputation above the knee joint, typically at the femur level. This prosthetic device serves to restore mobility and function, allowing users to walk, run, and perform daily activities while adapting to the loss of their natural limb. It consists of various components, including a socket that fits over the residual limb, a knee joint mechanism, and a foot or pylon attachment for support.

5 Must Know Facts For Your Next Test

  1. Above-knee prostheses are often more complex than below-knee options due to the need for a knee joint mechanism that replicates the natural motion of walking.
  2. These prostheses can be classified into two main categories: mechanical (non-powered) and microprocessor-controlled systems that enhance mobility and adaptability.
  3. The fit and comfort of an above-knee prosthesis are crucial for successful rehabilitation; improper fitting can lead to discomfort or skin issues.
  4. Individuals using above-knee prostheses may require physical therapy to adjust to their new device, regain strength, and improve gait mechanics.
  5. Advancements in materials and technology have significantly improved the functionality and weight of above-knee prostheses, making them more user-friendly.

Review Questions

  • How does the design of an above-knee prosthesis facilitate mobility for amputees compared to other types of prosthetics?
    • The design of an above-knee prosthesis incorporates a knee joint mechanism that allows for natural flexion and extension, which is essential for normal walking patterns. This feature distinguishes it from below-knee prosthetics, which do not require a similar joint. By closely mimicking the biomechanics of a natural leg, above-knee prostheses enable users to engage in various activities with improved mobility, thereby enhancing their quality of life.
  • Discuss the importance of socket fit in the overall effectiveness of an above-knee prosthesis.
    • Socket fit is critical in ensuring the effectiveness of an above-knee prosthesis because it directly affects comfort, stability, and alignment. A well-fitted socket reduces the risk of pressure sores or discomfort during use. Proper fitting also enhances proprioception and control during movement, which can significantly impact how confidently and effectively an individual can walk or engage in physical activities with their prosthesis.
  • Evaluate how advancements in technology have transformed above-knee prostheses and their impact on user experience.
    • Advancements in technology have led to the development of microprocessor-controlled knee joints and lightweight materials, revolutionizing above-knee prostheses. These innovations enhance functionality by providing better responsiveness to varying walking speeds and terrain. Users experience improved balance and stability, which can significantly reduce the risk of falls. As a result, these modern devices not only improve mobility but also foster greater independence and confidence among amputees in their daily lives.