Child’s 4-Bar Knee
1 2 3 4 Featuring a polycentric design for stability during stance and an adjustable extension assist spring to provide swing control, the Child’s 4-bar Knee is a durable and lightweight paediatric knee designed for active children.
Available with a choice of proximal adapters including a Standard Socket Alignment Kit allowing for A-P shift, rotation and flexion, extension, adduction and abduction. A Lamination Socket Adapter Kit allows for A-P shift and is ideal where a minimal build height is required. All alignment adjustments can be made using the easily accessed single bolt.
The knee comes complete with a 25mm lightweight carbon fibre tube and 3 different extension springs for optimal fitting.
Key Features
- Polycentric knee for stance stability
- Adjustable extension assist spring
- Wide range of alignment
- Low build height
Child’s 4-Bar Knee Clinical Evidence Reference
Improvements in Clinical Outcomes using four-bar, polycentric knees compared to monoaxial knees
- Increased mean prosthetic minimum toe clearance2,4, reducing the likelihood of tripping.
- Fully satisfies stance phase stability3
- Acceptable cosmetics for knee disarticulation amputees and trans-femoral amputees with long residua1
- Meets all the design requirements for paediatric patients3
References
| 1. | de Laat FA, van Kuijk AA, Geertzen JH, et al. Cosmetic effect of knee joint in a knee disarticulation prosthesis. J Rehabil Res Dev 2014; 51: 1545. | |
| 2. | Sensinger JW, Intawachirarat N, Gard SA. Contribution of prosthetic knee and ankle mechanisms to swing-phase foot clearance. IEEE Trans Neural Syst Rehabil Eng 2012; 21: 74–80. | |
| 3. | Andrysek J, Naumann S, Cleghorn WL. Design characteristics of pediatric prosthetic knees. IEEE Trans Neural Syst Rehabil Eng 2004; 12: 369–378. | |
| 4. | Gard SA, Childress DS, Uellendahl JE. The influence of four-bar linkage knees on prosthetic swing-phase floor clearance. JPO J Prosthet Orthot 1996; 8: 34–40. |
See all the Clinical Evidence for every Blatchford product in our Clinical Evidence Finder Tool.
Child’s 4-Bar Knee Technical Data
Max. User Weight:
60kg
132lb
Activity Level:
1-4
Component Weight:
335g†
12oz†
Build Height:
105mm
4⁹/₆₄"
Accessories
Proximal Adapters
| Child’s TF alignment kit | 189226 |
| Lamination Socket Alignment Kit | 189126 |
| M30 Laminate Adapter 4 Prong Kit | 189626 |
| M30 Childs Adapter Kit | 189726 |
| Female Mini Pyramid Pylon Kit 25mm | 409099 |
Ordering
Part Number:
| Child’s 4-bar Knee with 330mm tube | 019245 |
| Child’s 4-bar Knee without tube | 239133 |