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Wonderful Orthopaedic, Trauma & Prosthetics

Wonderful 7E7

Product Code: OTAP-PLAC-4167

A single-axis hip for limbs that start at the pelvis.

Mount one stainless axis on the front of a pelvic socket and the leg below it can swing through. At 750 g and rated to 100 kg, the 7E7 serves people who lost the whole limb at the hip, or part of the pelvis too, after a tumour, trauma or infection.

Sections

Prosthetic Feet & Knees

Categories

Orthopaedic, Trauma & Prosthetics

Condition

New

Origin

China

Seller Type

Certified Professional Seller

CE & ISO Certified

Global Shipping

Supplier: Medigear

Hip disarticulation and hemipelvectomy limbs are where Wonderful's 7E7 belongs, as a single axis prosthetic hip joint made from stainless steel. Its sheet prints a mass of 750 g, a load weight of 100 kg and a flexion range of 110°. That last figure sits under a label reading Knee Flexion Range, so Wonderful should state in writing that it describes the hip. The name points to one free pivot, with no lock or extension assist among its listed functions, and the instructions for use describe how motion is stopped.

Its users have lost the entire leg at the hip joint, or part of the pelvis too, most often after a sarcoma or other tumour, major trauma or infection. Their limb hangs from a pelvic socket, usually called a basket, with the hip joint on its front and a knee and foot below. Because amputation at this level is rare, most services fit few of these limbs. The 7E7 suits a wearer who can walk with a free single-axis hip and a matched knee and foot, within 100 kg including anything carried. Anyone heavier, or anyone needing a different hip mechanism, falls outside its brief.

The photograph shows a narrow grey metal body with holes and two small pins, a blue block on one side, a dark ridged section below and a thin wire or cable. Wonderful's online listing gives 0.80 kg, so plan the weight budget at 800 g until the drawing settles it. Everything in the carton is itemised on the quotation.

Overall length, build height and the connections to socket and thigh section appear on the manufacturer's dimension drawing, which the enquiry team shares. It is available to buyers in more than 80 countries through Medigear.uk, and the enquiry team sets out stock and lead time.

The 7E7 is a joint for the smallest group in lower-limb prosthetics. In US data from 1988 to 1996, cited by Schindler and colleagues in 2023, hip disarticulations made up 0.4% of lower-extremity amputations and pelvic-level amputations 0.1%. Causes vary by centre. In the Stanmore audit of 27 patients, 78% had a tumour, 15% trauma and 7% an infected endoprosthesis, while a German series of 15 patients recorded seven infections, six tumours, one trauma case and one ischaemia case.

Selection is the main clinical decision. A Mayo Clinic review of 43 patients found that 43% became successful prosthetic users, and coronary artery disease was the only preoperative factor linked to failure, with age and body mass index showing no association. Teams therefore assess cardiac reserve, trunk strength and motivation before casting a basket, and a sitting socket is a reasonable first step for someone still undecided.

Where a walking limb is chosen, the 7E7 fits wearers who can control a free single-axis hip with their pelvis and trunk, paired with a knee and foot the prosthetist matches to them, within 100 kg. Specialist limb-fitting and rehabilitation centres, sarcoma and orthopaedic oncology pathways, major trauma rehabilitation units and export programmes for limb services are the settings where it is ordered. Because few services see this level often, an experienced prosthetist's written build plan and the manufacturer's alignment instructions anchor every fitting. NHS trusts in England order through the mandated prosthetics framework, and public buyers abroad follow their own rules. The conformity documentation those procurement routes require is issued by the manufacturer and shared by the enquiry team.

Designed around a defined population

The joint has one job: the hip of a limb built at the pelvis. That narrow brief makes the screening question for each referral short and clear.

One pivot to align

A single axis gives the prosthetist one line of rotation to set against the wearer's anatomy on the front of the basket. A single pivot also keeps the review checklist short.

Stainless steel construction

The sheet lists SS, read as stainless steel. It is a common prosthetic metal because it tolerates sweat and cleaning, and the material certificate names the exact grade.

A load figure that agrees across sources

Both the sheet and Wonderful's online listing give 100 kg, so the limb can be planned at that figure without a lower fallback. The structural test report adds the loading level behind it.

A known mass for the weight budget

At 750 g on the sheet, the joint's contribution to a heavy limb is known before the build starts. Prosthetists can add the socket, knee, tube and foot to reach a real total.

Room to choose the knee and foot

Nothing about a single-axis hip fixes the parts below it. The prosthetist can select a knee and foot for the individual, provided each is rated at or above 100 kg.

A clear ceiling for selection

One printed rating gives referrers a simple first filter. Body weight, footwear and anything the wearer routinely carries all have to sit within it.

A warranty stated by the maker

Wonderful's own listing quotes one year from delivery. For a service fitting few of these limbs, a known warranty period helps when planning a replacement.

Single axis hip joint

The name on the sheet, Single Axis Hip Joint 7E7, sets out the design: one pivot between socket and thigh section. Whether it swings freely through its whole range is described in the instructions for use.

Stainless steel body

"SS" is the only material entry. Which parts are steel, and which grade, appear on the material certificate.

750 g mass on the sheet

Printed as "Weight 750g". Wonderful's online listing gives 0.80 kg, and the drawing or a weighed sample resolves the difference.

100 kg load weight

The sheet line reads "Load Weight 100 kg", and the online listing says body weight up to 100 kg. The ISO 15032 or ISO 10328 loading level is stated in the test report.

110° printed flexion

This is the only movement figure on the sheet. It needs Wonderful's written statement that it belongs to the hip, given the knee label above it.

Template label on the sheet

The row heading reads Knee Flexion Range on a hip joint's table. Treat it as a layout carried over from another sheet until the manufacturer says otherwise.

Narrow grey body

The photograph shows an elongated grey metal body, longer than it is wide, with several holes along it and a larger round opening near the middle.

Two small pins at the upper edge

Two short projections stand out from one edge of the body in the image. Their role, whether stops, fixings or adjusters, is shown on the drawing.

Blue side block

A blue block, angled at its upper end, sits against one side of the grey body. The instructions for use identify what it is and whether it is part of the supply.

Thin wire or cable

A fine wire or cable runs through the upper part of the body and out to one side in the photograph. Its function, if it is part of the joint, is explained in the manufacturer's documentation.

Dark ridged lower section

Below the grey body, the image shows a short dark section with a ridged profile. The drawing shows whether it is a connector, a tube end or something else.

Socket attachment

The joint mounts on the front of the pelvic socket. The fixing method, screws and torque values are given in the manufacturer's instructions for use.

Distal connection

How the thigh section and knee attach below the joint is set out on the dimension drawing, which the enquiry team shares.

Manufacturer's quality statements

Wonderful's website describes an ISO 13485 quality system and CE certification, and its online listing cites ISO 9001:2000. The model-level documents are issued by the manufacturer and shared by the enquiry team.

Choose the 7E7 for an adult with a hip disarticulation or hemipelvectomy who has passed a realistic walking assessment, can control a free single-axis hip from the trunk, and stays within 100 kg with everything carried. It suits specialist services that build these limbs occasionally and want a plain, documented joint for the front of the basket. Pass on it for anyone heavier, anyone whose team wants a locking, assisted or damped hip, and anyone better served by a sitting socket. Settle the hip's flexion range in writing, because the sheet's label belongs to a knee.

Medigear.uk lists the 7E7 for business buyers worldwide and can arrange delivery, installation, commissioning, familiarisation and service cover. Ask the enquiry team for the instructions for use, the structural test report with its loading level, the dimension drawing, the material certificate, written flexion and mass figures and the declaration of conformity before ordering.

FAQ

Frequently Asked Questions

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

It is for adults whose amputation runs through the hip joint or removes part of the pelvis, typically because of a bone or soft-tissue sarcoma, major trauma, or an infection that could not be cleared. The ideal candidate has the strength and balance to walk with a hip that pivots freely, guided by body movement. A pelvic socket carries the joint, so the socket fit matters as much as the joint itself.

Anyone whose body weight plus carried load exceeds 100 kg is outside the rating. A wearer whose clinicians want a hip that locks, one with extension assist or one with damped motion needs a joint whose documentation lists that function. People who will mainly sit, or who have not yet shown they can manage a hip-level limb, may be better served by a sitting socket or a wheelchair plan first.

Probably, but the sheet prints it under the heading Knee Flexion Range, which looks like a label carried over from a knee template. A hip joint and a knee bend in different places, so the figure matters only once its owner is clear. Ask the enquiry team for Wonderful's written statement of the hip's flexion range and any built-in stop.

A limb is only as strong as its lowest-rated part. Many knees, adapters and feet carry 125 kg or more, so at 100 kg this hip joint usually sets the ceiling for the whole build. The loading level behind the figure appears in the manufacturer's structural test report, which the enquiry team shares.

ISO 15032 specifies static and cyclic strength tests for the components of hip disarticulation prostheses at hip and thigh level. ISO 10328 covers the distal part of hip-disarticulation and hemipelvectomy limbs, meaning the knee, tubes and foot below. A complete technical file for a hip-level limb therefore draws on both, and the test report names which one the 7E7 was tested against.

Published series suggest that fewer than half do. A Mayo Clinic review of 43 hip disarticulation and hemipelvectomy patients, published in the American Journal of Physical Medicine and Rehabilitation in 2015, found that 43% used a prosthesis successfully, wearing it for an average of 5.8 hours a day. A retrospective audit of 27 patients at the Royal National Orthopaedic Hospital, Stanmore, found that 67% trialled a walking limb and a third of those later returned to a wheelchair. These figures describe the amputation level in general, not this joint.

Every gram of a hip-level limb hangs from the pelvis and is moved by the trunk. Sneppen and colleagues reported 41 hemipelvectomies for malignant tumours in Acta Orthopaedica Scandinavica in 1978. Of the 27 patients who completed training, 12 later discarded the prosthesis, and six of them found it too heavy or difficult to wear. The 7E7's share of that weight is 750 g on its sheet and 0.80 kg online.

The image shows a blue block fixed to the side of the grey body and a thin wire or cable passing through its upper part. Neither is named on the sheet, so their purpose, and whether they ship with the joint, are set out in the instructions for use and the quotation. The image is small, and any fine detail on the parts cannot be read from it.

The 7E7 is typically Class I under UK MDR 2002, or higher depending on use, as stated on the manufacturer's declaration of conformity, which the enquiry team shares. An EU declaration of conformity dated 26 June 2022, hosted online and attributed to Wonderful, lists "Single Axis Hip Joint (7E7)" as Class I under Rule 1 of Regulation (EU) 2017/745. A limb built around the joint for one named wearer is a custom-made device, so the workshop that builds it holds the manufacturer duties.

They buy through NHS Supply Chain. Its Prosthetic Components and Associated Products framework is the compliant route NHS England mandates for prosthetic products, and its single lot, Artificial Limbs, runs from 24 November 2025 to 23 November 2027. Hospitals buying elsewhere follow their own national tender rules, which call for similar conformity papers.

Wonderful's online listing for the 7E7 states one year from delivery. The terms that apply to a specific order, including who handles a claim, are set out in the quotation from the enquiry team.