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Orthopaedic, Trauma & Prosthetics
Wonderful 4F21-EL

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Wonderful Orthopaedic, Trauma & Prosthetics

Wonderful 4F21-EL

Product Code: OTAP-PLAC-3036

Build height chosen to the space between socket and foot.

Every fitting in a modular limb occupies vertical space, and that space is finite. What is left between the socket and the ground after a knee and a foot decides which components can be used at all. Listed on Medigear.uk for UK business buyers.

Sections

Prosthetic Components & Adaptors

Categories

Orthopaedic, Trauma & Prosthetics

Condition

New

Origin

China

Seller Type

Certified Professional Seller

CE & ISO Certified

Global Shipping

Supplier: Medigear

There is a fixed distance between the bottom of a socket and the floor, and everything in a prosthesis has to fit inside it.

That distance is set by the patient, not the components. A long residual limb leaves little room below the socket. A knee disarticulation leaves less still, because the socket extends to the level the anatomical knee occupied and the prosthetic knee has to sit beneath it. A short transfemoral residual limb, by contrast, leaves a great deal of room. Component selection follows from whichever situation applies, and it is a constraint the prosthetist works within rather than around.

Each fitting consumes part of that budget. A foot has a minimum clearance height before anything is attached to it. An adapter adds its own height. A clamp adds more. A knee, where one is fitted, takes the largest share. Add them together and the total must be less than the space available, with enough left for a pylon of workable length. Where the sum exceeds the space, components have to be substituted for lower-profile alternatives, and the range of substitutions available is limited.

This is why manufacturers publish minimum build height for structural components and offer fittings in more than one height. A taller clamp is useful where space is plentiful, since it can take up length that would otherwise need a longer pylon. A lower-profile fitting is what makes a constrained build possible at all.

The consequence for ordering is direct. Build height is not adjustable after purchase, so a fitting that is too tall for the space cannot be made to fit, and the component is unusable rather than merely inconvenient. It has to be established before order against the measurements taken from the patient.

Within that, the clamp performs the ordinary function. A slot through the body closes as the screws are tightened, gripping the pylon by friction across the contact area. Insertion depth sets limb length and rotation before tightening sets toe-out or toe-in, both revisable as alignment needs change. Clamp screw torque and minimum insertion depth are published figures rather than matters of judgement, and both should come from this product's instructions.

Bore diameter is the other non-negotiable. Modular systems use two pylon diameters and a clamp takes one of them, with no adaptor reconciling the difference.

This is a component supplied for fitting within a prosthesis by a qualified prosthetist, who establishes the available build height, selects components within it, cuts the pylon and tightens the clamp to the specified torque. The manufacturer, build height, bore, material, rating, screw specification, torque and insertion depth 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.

Long residual limb transtibial fittings are where build height is most constrained below the socket.

Knee disarticulation fittings leave the least space of all, since the socket extends to the level the anatomical knee occupied.

Short transfemoral residual limbs leave ample space, where a taller fitting can take up length instead of a longer pylon.

Component substitution for lower-profile alternatives is the response where the total exceeds the space available.

Limb length is established at this fitting through pylon insertion depth.

Toe-out and toe-in are set by rotating the pylon before the screws are tightened.

Clinics holding stock benefit from clamps in more than one height and bore, since neither is adjustable after purchase.

Height Selected to the Patient's Space

Build height is chosen against the measured distance between socket and floor rather than assumed.

Length Taken Up Where Space Allows

A taller fitting can absorb length that would otherwise require a longer pylon.

A Constraint Settled Before Order

Build height cannot be adjusted afterwards, so establishing it early avoids an unusable component.

Bore Established Alongside It

Pylon diameter is equally fixed, and both figures together determine whether the fitting can be assembled.

Length Set at the Bench

How far the pylon enters the bore determines the distance between socket and foot.

Rotation Set Before Tightening

Turning the pylon within the clamp sets toe-out or toe-in.

Grip Across the Contact Area

Closing the slot grips the tube by friction over its full contact length rather than at one point.

Adjustment That Can Be Revisited

Alignment changes during rehabilitation are accommodated by loosening, resetting and retightening.

Torque and Insertion Taken From the Instructions

Both are published figures rather than matters of judgement, and both come from this product's documentation.

Reference Table Obtained

The full family table is requested, so a buyer ordering by code knows what the code denotes.

Supply and Documentation Arranged

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

Clamp Fitting for Modular Prostheses

Joining a pylon to an adapter in a modular lower limb build.

Item Reference: 4F21-EL

To be confirmed against the manufacturer's marking, with the suffix meaning established.

Position in the 4F21 Range

Confirmed at quotation against the full reference table.

Manufacturer

Wonderful Rehabilitation, to be confirmed at quotation.

Build Height

Confirmed at quotation, as it counts against the space between socket and floor.

Bore Diameter

Confirmed at quotation, matched to the pylon the build uses.

Material and Finish

Confirmed at quotation.

Clamp Slot and Screws

Slot closing onto the tube, with screw size, count and type confirmed at quotation.

Clamp Screw Torque

Confirmed at quotation from the manufacturer's instructions.

Minimum Tube Insertion Depth

Confirmed at quotation.

Proximal Connection

Confirmed at quotation.

Maximum Body Weight

Confirmed at quotation.

Product Weight

Confirmed at quotation.

Compatible Pylons and Adapters

Confirmed at quotation.

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 4F21-EL is a clamp fitting joining a pylon to an adapter in a modular lower limb prosthesis, and the question it raises first is one of space. There is a fixed distance between the bottom of a socket and the floor, set by the patient rather than by the components: a long residual limb leaves little room beneath the socket, a knee disarticulation leaves less still because the socket extends to the level the anatomical knee occupied, and a short transfemoral limb leaves a great deal. Every fitting consumes part of that budget, from the foot's minimum clearance height upward, and the total must come in under the space available with enough left for a workable pylon. Build height is not adjustable after purchase, so a fitting too tall for the space is unusable rather than inconvenient, which makes it a figure to establish before order alongside bore diameter, neither of which can be read reliably from the reference codes as this family is currently published. Within those constraints the clamp grips the pylon by friction as its slot closes, with insertion depth setting length and rotation setting toe-out. Selection and fitting are the work of the prescribing prosthetist. Build height, bore, material, rating, torque and insertion depth are provided by the seller at quotation alongside UKCA or CE documentation. Medigear.uk lists the fitting for UK business buyers and can arrange supply, documentation and the provision of consumables. Enquire for a written quotation.

FAQ

Frequently Asked Questions

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

It is a clamp fitting joining a pylon to an adapter in a modular lower limb prosthesis. The suffix, build height and bore are confirmed at quotation.

It is not established. Other references in this family use suffixes for material and bore diameter, and this one follows neither pattern, so the manufacturer's reference table is needed.

The vertical space a fitting occupies between the components above and below it, which counts against the total distance available between socket and floor.

Because that distance is set by the patient. A long residual limb or a knee disarticulation leaves very little room, and components must sum to less than the space available.

No. A fitting too tall for the space cannot be made to fit, which makes it unusable rather than inconvenient, so height is established before order.

Where space is plentiful, since it takes up length that would otherwise require a longer pylon.

Confirmed at quotation. Modular systems use two pylon diameters and a clamp accepts one of them.

How far the pylon enters the clamp bore, established at the bench and adjustable afterwards.

How the pylon is turned within the clamp before the screws are tightened.

The figure from this product's instructions for use, alongside the minimum tube insertion depth.

A qualified prosthetist, who establishes available build height, selects components within it and tightens to the specified torque.