Design characteristics of pediatric prosthetic knees

  title={Design characteristics of pediatric prosthetic knees},
  author={Jan Andrysek and Stephen Naumann and William L. Cleghorn},
  journal={IEEE Transactions on Neural Systems and Rehabilitation Engineering},
We examined whether pediatric prosthetic single-axis knees can theoretically provide the beneficial functional characteristics of polycentric knees and the design considerations needed to realize this. Five children and their parents provided subjective opinions of the relative importance of functional requirements (FRs) for the knee. FRs related to comfort, fatigue, stability, and falling were found to be of high importance, while sitting appearance and adequate knee flexion were of lower… 

Design and quantitative evaluation of a stance-phase controlled prosthetic knee joint for children

Stance-phase modeling results indicated decreased zones of instability for the new knee as compared to other paediatric knee joints, and questionnaire results revealed a decrease in the frequency of falls with the prototype compared toother knees, especially in highly active children.

Development of prosthetic knee joint technologies for children and youth with above-knee amputations

Mobility and participation in physical activity is of primary importance for children with limb absence or loss. A prosthetic knee joint is an essential facilitator of this, providing controlled

Mechanisms and component design of prosthetic knees: A review from a biomechanical function perspective

This article provides a review of prosthetic knees from a biomechanical perspective and includes stance stability, early-stance flexion and swing resistance, which directly relate the mechanical mechanisms to the perceived walking performance, i.e., fall avoidance, shock absorption, and gait symmetry.

Functional Stability of Transfemoral Amputee Gait Using the 3R80 and Total Knee 2000 Prosthetic Knee Units

The Total Knee 2000 was found to be less stable than the 3R80 in early stance and more stable thanThe 3R 80 in mid- and late-stance and the responses to the subjective questionnaires indicated that most subjects felt more stable and more confident bearing weight on the TotalKnee 2000 than the3R80.

Modeling and Design of the Automatic Stance Phase Lock (ASPL) Knee Joint Control Mechanism for Paediatric Users With Transfemoral Amputations

The overall objective for this work was to characterize the ASPL control mechanism with biomechanical modelling and design a 2-axes ASPL prosthetic knee joint suitable for children between the ages of 6 and 12 years.

Evaluation and Design of a Globally Applicable Rear-locking Prosthetic Knee Mechanism

The knee performed close to the level of a conventional six-bar knee providing highly effective stance-phase control and the pilot test showed that improvements to the swing-phase response could further reduce the asymmetry of gait.

Application of Quality Function Deployment for the Development of a Prosthetic Knee Joint

Quality Function Deployment provides a structured approach during the design process to identify which specific design parameters (DPs) of a product or system most efficiently address the end-user’s requirements.

Crawling Kinematics in an Early Knee Protocol for Pediatric Prosthetic Prescription

This study assessed the effects of an Early Knee protocol, in which children received an articulating prosthetic knee in their first prosthesis, as many as 3 years before the conventional protocol would dictate.

A systematic review on design technology and application of polycentric prosthetic knee in amputee rehabilitation

A systematic review on design technology and clinical application of polycentric prosthetic knee joint in the rehabilitation of trans-femoral amputees and the results reveal that polycentric knees have a variety of geometries but the methods for comparing their performances are rare.



Conventional 4-bar linkage knee mechanisms: a strength-weakness analysis.

The present 4-bar linkage knees-with-lock are a derivation of the free-moving knees, which are of no relevance when walking with a fixed knee, and there is a demand for a simple knee mechanism that moves freely during the swing phase, locks at the beginning of the stance phase, and unlocks at the end of it.

Four-bar linkage prosthetic knee mechanisms: Kinematics, alignment and prescription criteria

The kinematics of several types of four-bar mechanisms are described, and the differences and prescription criteria for three different classes ofFour-bar linkage mechanisms currently available for fitting to amputees are discussed.

Knee mechanisms for through-knee prostheses

The stability diagram illustrates how voluntary and involuntary stability can be utilized by using different polycentric linkage mechanisms for through-knee amputees.

Mechanical work adaptations of above-knee amputee ambulation.

The influence of limb alignment on the gait of above-knee amputees

  • Lang Yang
  • Biology, Medicine
    Journal of biomechanics
  • 1991

Enumeration of human knee prostheses--an overview.

An attempt has been made to enumerate the available human knee-prostheses, both implants and external prostheses, according to their motion to benefit kinematicians and designers to analyze the available mechanisms and make necessary improvements.

Characteristics of the Child Amputee Population

A census of patients treated at member clinics of the Association of Children's Prosthetic-Orthotic Clinics (ACPOC) was conducted to obtain a rational basis for children's prosthetic design, development, research, and educational activities.

The influence of stance-phase knee flexion on the vertical displacement of the trunk during normal walking.