Wonderful FB-01

The FB-01 belongs in transfemoral limbs for wearers whose days cross more than one environment, and the clinical work lies in mapping those environments before the settings are fixed. Ask where the person wakes, works and travels. A commuter may leave a heated flat, wait at a cold bus stop and spend the day in an air-conditioned office. A farmer in a tropical region may meet the opposite pattern.

Engineering sources explain why that map matters. A 2019 paper on knee prosthesis dampers names changing fluid temperature as the first drawback of hydraulic damping, because viscosity alters while the patient moves. Heat also builds inside the cylinder. A 2018 thesis on hydraulic knee prostheses with electronic control fitted a heat pipe to the dampers. It lengthened the time to the critical temperature by 140% and shortened cooling through the first 20 °C by 24%. Both sources describe the knee type and its physics. Neither tested this model, so its own limits come from the instructions for use.

Buildings ask their own questions. Lifts mean standing still and then stepping off promptly. Stairs and ramps depend on how the cylinder behaves under load, which the instructions describe. Polished floors in hospitals, airports and shopping centres put the demand on the foot and on the wearer's confidence.

Three groups fall outside the brief: wearers who need a lock, limited walkers who would carry 1100 g for little return, and anyone above the finished limb's rating.

Limb-fitting centres, private prosthetic clinics, rehabilitation hospitals and export programmes in hot and cold regions are the natural settings. NHS trusts in England buy through the mandated prosthetics framework, and public buyers elsewhere follow their own routes. The conformity documentation those procurement routes require is issued by the manufacturer and shared by the enquiry team.

Tuning that starts from the wearer's weather

Treating temperature as a fitting variable gives the prosthetist a clear method: adjust the swing in the conditions the wearer lives in. The result is a setting that holds on ordinary days.

A review trigger the wearer can recognise

Someone told that cold firms the swing and heat frees it knows what to report. A change that follows the season is information, and a change that does not is a reason to inspect the knee.

Titanium on the material line

The sheet names titanium, a metal valued in prosthetics for strength at modest weight and for resisting corrosion. The alloy grade and the parts made from it are on the material certificate.

A 150 kg figure for larger users

The printed load weight brings heavier adults into the candidate list. It governs a limb only when the test report supports it and every other component matches.

Flexion for seats, cars and aircraft

At 135°, the shin folds well back under a chair. Travellers use that range in car footwells, on trains and in the tight rows of an aircraft cabin.

No battery to carry between countries

Nothing here needs charging, so there is no charger, plug adapter or battery rule to manage on a journey. A service has no electrical safety test to schedule.

One enclosed unit to handle

The photograph shows a single closed body. One assembly is simpler to pack, store and log than a knee supplied with loose external parts.

Honest limits before the order

Lock users, limited walkers, builds above the limb rating and climates outside the stated range are all named in advance. Referrals can be screened against those points before bench time is spent.

Hydraulic swing control

Both the English and the Chinese names call the joint hydraulic. Oil passing through restricted openings supplies the resistance, and the instructions for use show where it is adjusted.

Temperature-sensitive damping

Resistance follows oil viscosity, and viscosity follows temperature. The instructions for use state the operating window within which the manufacturer expects normal behaviour.

150 kg load weight

Printed as "Load Weight:150Kg". The ISO 10328 test report records the loading level at which the knee reached it.

1100 g mass

The figure sits in brackets beside the code on the sheet. Add it to the socket, tube and foot when weighing the finished limb, since the hip swings all of it.

135° knee flexion range

The sheet states this range directly. It decides how the limb sits in low chairs, vehicles and aircraft seats.

Titanium construction

"TI" is the whole of the material line. Alloy grade and the split by part are given on the manufacturer's material certificate.

Enclosed black body

In the photograph, the unit is black and closed along its full length, with no exposed frame or cylinder visible. What that outer layer is made of is a question for the drawing.

Knee-and-shin length

The pictured unit extends well below the joint, towards where a shin tube would normally begin. Build height on the drawing shows how much room it needs under the socket.

Small top fitting

A pale metal fitting stands on the upper end in the image. Its type, and the socket adapter that mates with it, are specified on the drawing.

Stepped notch on one edge

Partway down one side, the outline in the photograph steps inwards. The drawing identifies whether this is a joint line, an access point or styling.

Rounded lower end

The base of the pictured unit is rounded and closed. The distal connection, and the tube or foot adapter it accepts, are detailed on the drawing.

Linkage type

The name leaves open whether the knee turns on one axis or several. The pivots appear on the manufacturer's drawing, and their layout shapes stability when the wearer stands on the limb.

Stance behaviour under load

The instructions for use describe what the cylinder does when body weight bends the FB-01 in stance. Stair and ramp training follows from that description.

Storage and transport conditions

Limbs are left in cars, lofts and luggage holds. The instructions for use give the storage temperature limits and any rest period advised after extreme exposure.

Service arrangements

Seals age, and a cylinder is normally overhauled by the manufacturer or an approved workshop. The maintenance schedule gives the interval, and warranty terms come with the quotation.

Manufacturer's quality statements

On its website, Wonderful describes a quality management system to ISO 13485 together with CE certification. A declaration naming the FB-01 by code is issued by the manufacturer and shared by the enquiry team.

Choose the FB-01 for a transfemoral wearer who moves between settings: cold streets and heated rooms, humid clinics and cooled offices, home and abroad. It rewards a service willing to tune the swing in real conditions and to review it when those conditions change. Pass over it for anyone who needs a lock, for limited walkers and for builds above the finished limb's rating. Four answers settle the order. They are the operating and storage temperature range, the permitted exposure to moisture and dust, the cylinder's behaviour under load on stairs and ramps, and the loading level behind 150 kg. Rate the adapters and foot to suit the wearer too.

Medigear.uk lists the FB-01 for business buyers worldwide and can arrange delivery, installation, commissioning, familiarisation and service cover. Ask the enquiry team for the instructions for use, ISO 10328 test report, drawing, material certificate and declaration of conformity before ordering.