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Orthopaedic, Trauma & Prosthetics
Wonderful 3F29P

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Wonderful Orthopaedic, Trauma & Prosthetics

Wonderful 3F29P

Product Code: OTAP-PLAC-2929

Linked bars rather than a single pin, carrying stability and clearance.

The photograph of this component shows a linked-bar construction with multiple pivot pins. In a knee of that type the geometry of the linkage does the work that a single hinge cannot, and how it is set up falls to the prosthetist. Listed on Medigear.uk for UK business buyers.

Sections

Prosthetic Feet & Knees

Categories

Orthopaedic, Trauma & Prosthetics

Condition

New

Origin

China

Seller Type

Certified Professional Seller

CE & ISO Certified

Global Shipping

Supplier: Medigear

Knee components arrive at a fitting as a set of numbers a prosthetist has to work with, and the sequence in which those numbers matter is fairly consistent.

The first question is whether the joint is appropriate for the person at all. Load rating and indicated mobility grade settle that, alongside the amputation levels the manufacturer states the component is intended for. A joint indicated for a lower activity level behaves differently from one intended for a higher one, and neither is a substitute for the other.

The second question is whether it will physically fit the build. Component weight, structural height and system height define the envelope the prosthetist has to work within, measured from the socket down to the foot. On linked-bar joints this matters more than on single-axis designs, because the mechanism occupies space and folds through a path as it flexes. In knee disarticulation and long residual limb fittings, where there is little room below the socket, build height frequently decides which components can be considered.

The third question is whether it connects to what has already been chosen. Proximal and distal interfaces have to match the adaptors, tube diameter and foot in the specification, and a mismatch there is discovered at assembly rather than on paper.

Only then does the mechanism itself come into play. In a linked-bar knee the effective centre of rotation is not at any physical pivot and moves as the joint flexes, so stance stability and swing clearance are both served by geometry. Where a pneumatic or hydraulic unit is fitted alongside the linkage, resistance additionally varies with how fast the joint is moving, so behaviour tracks walking speed. Which of these applies to this component is established from the manufacturer's documentation.

Serviceability follows from construction. Linked-bar joints carry multiple pivot pins and bearings, and the bearing type and the availability of replacement pins bear on how the component is maintained over its working life.

This is a component rather than a finished prosthesis. It is fitted, aligned and adjusted by a qualified prosthetist as part of a limb assembled around the individual, and selection, alignment, settings and suitability for a given patient are clinical decisions taken by that professional. The manufacturer, year, linkage construction, control type, load rating, mobility grade, indicated amputation levels, build heights and connection types are provided by the seller at quotation, with UKCA or CE marking documentation, the declaration of conformity, instructions for use and warranty terms issued by the manufacturer or held by the seller.

Transfemoral prosthetic fitting is the primary application, with the joint supplied as a component for a prosthetist to align and adjust within a complete limb.

Knee disarticulation and long residual limb fittings are where linked-bar geometry is commonly specified, since the mechanism folds compactly and space below the socket is limited.

Suitability for a given patient follows the load rating and indicated mobility grade, both taken from the manufacturer's instructions for use.

Limb builds using existing adaptors, tubes and feet depend on the proximal and distal connection types matching what has already been specified.

Stance stability and swing clearance are both served by the linkage geometry, with the specific behaviour established from the manufacturer's documentation.

Users walking at varying speeds are served differently according to whether a pneumatic or hydraulic unit is fitted alongside the linkage.

Clinics maintaining a component stock benefit from documentation held against each item, so a joint can be matched to a patient without re-establishing its specification.

Geometry Doing the Work

In a linked-bar knee the effective centre of rotation sits away from any physical pivot and moves through flexion, serving stance stability and swing clearance together.

Suited to Limited Build Height

Linked-bar geometry is commonly specified where space below the socket is short, including knee disarticulation and long residual limb fittings.

Load Rating Taken From the Instructions for Use

The maximum patient weight is established from the manufacturer's documentation rather than from any listing.

Mobility Grade Matched to the User

The indicated mobility grade and amputation levels are confirmed before the joint is specified into a build.

Build Envelope Confirmed Before Assembly

Component weight, structural height and system height are established so the prosthetist can work within them.

Connections Checked Against the Specification

Proximal and distal interfaces are confirmed so the joint matches the adaptors, tube and foot already chosen.

Control Type Established in Writing

Whether swing and stance control are mechanical, pneumatic or hydraulic is confirmed against the manufacturer's documentation.

Serviceability Considered at Purchase

Bearing type and the availability of replacement pivot pins are established, since a linked-bar joint carries several of both.

Documentation Requested With Supply

UKCA or CE marking documentation, the declaration of conformity and instructions for use are requested from the seller at quotation.

Clinical Decisions Left With the Clinician

Selection, alignment, settings and suitability remain the responsibility of the prescribing prosthetist.

Supply and Documentation Arranged

Medigear.uk can arrange supply, documentation and the provision of spares and consumables.

Modular Prosthetic Knee Joint

A component for above-knee prosthetic fitting, assembled into a limb by a prosthetist.

Item Reference: 3F29P

To be confirmed against the manufacturer's marking on the component.

Linkage Construction

Number of bars and pivot axes confirmed at quotation.

Swing and Stance Phase Control

Mechanical, pneumatic or hydraulic, confirmed at quotation.

Maximum Patient Weight

Confirmed at quotation against the manufacturer's instructions for use.

Mobility Grade and Indicated Amputation Levels

Confirmed at quotation against the manufacturer's instructions for use.

Maximum Knee Flexion

Confirmed at quotation.

Component Weight

Confirmed at quotation.

Structural Height and System Height

Confirmed at quotation for limb build calculations.

Proximal Connection

Type confirmed at quotation for compatibility with the socket and adaptors specified.

Distal Connection

Type and diameter confirmed at quotation for compatibility with the tube and foot specified.

Materials and Surface Finish

Confirmed at quotation.

Pivot Bearings

Bearing type and replacement pin availability confirmed at quotation.

Extension Assistance and Adjustment Ranges

The settings available to the prosthetist, confirmed at quotation.

Water Exposure Rating

Confirmed at quotation, with conditions of use taken from the instructions.

UKCA or CE Marking and Declaration of Conformity

Issued by the manufacturer and requested from the seller at quotation.

Instructions for Use

Provided by the seller at quotation, and required before fitting.

Warranty Terms

Set by the seller at quotation.

The 3F29P is a modular prosthetic knee joint supplied as a component to be built into a limb around one person. Components of this kind arrive at a fitting as a set of figures the prosthetist works through in sequence: whether the load rating and indicated mobility grade suit the individual, whether component weight and build heights fit the envelope available between socket and foot, and whether the proximal and distal interfaces match the adaptors, tube and foot already specified. Only then does the mechanism come into play, and in a linked-bar knee the effective centre of rotation sits away from any physical pivot and moves through flexion, so stance stability and swing clearance are both served by geometry, with any pneumatic or hydraulic unit adding resistance that varies with speed. Multiple pivot pins and bearings mean serviceability is worth establishing at purchase. Selection, alignment, settings and suitability remain clinical decisions for the prescribing prosthetist. The manufacturer, linkage construction, control type, load rating, mobility grade, build heights and connection types are provided by the seller at quotation, alongside UKCA or CE documentation and instructions for use. Medigear.uk lists the joint for UK business buyers and can arrange supply, documentation and the provision of spares and consumables. Enquire for a written quotation.

FAQ

Frequently Asked Questions

Everything buyers need to know about sourcing medical equipment through MediGear.

It is a modular prosthetic knee joint supplied as a component for a prosthetist to fit within an above-knee prosthesis. The construction, ratings and build figures are confirmed at quotation against the manufacturer's documentation.

The effective centre of rotation is not at any physical pivot and moves as the joint flexes, so stance stability and swing clearance are both served by the geometry of the linkage.

Whether swing and stance control are mechanical, pneumatic or hydraulic is confirmed at quotation against the manufacturer's documentation.

Confirmed at quotation against the manufacturer's instructions for use, which is the only source that should be relied on for a load-bearing component.

Confirmed at quotation, alongside the amputation levels the manufacturer states it is intended for.

Structural height and system height are confirmed at quotation, and they matter particularly in knee disarticulation and long residual limb fittings.

Because the mechanism occupies space and folds through a path as it flexes, so the envelope it needs is larger than a single pivot.

Proximal and distal connection types are confirmed at quotation, since a mismatch with the adaptors, tube or foot specified is found at assembly.

Multiple pivot pins and bearings are involved, so bearing type and the availability of replacement pins are established at quotation.

The water exposure rating is confirmed at quotation, along with the manufacturer's stated conditions of use.

A qualified prosthetist, who sets alignment and any adjustable settings to the individual as part of a complete prosthesis.