Meridium

The Meridium prosthetic foot was specially designed for moderately active users who navigate varied indoor and outdoor environments and place a high value on intuitive adaptation that replicates natural movement.

  • Constant adaptations within the foot adjust to changes in terrain like uneven ground and slopes
  • The microprocessor controls the smooth hydraulic rollover and makes walking feel effortless
  • Automatic heel height adjustment for easy shoe changes

It's more than a prosthetic foot. It’s a foundation.

Four-axis kinematics

The four-axis kinematics enable especially good adaptation to natural movements while walking. Four axles flexibly connect the toe plate, foot and ankle with one another.

Electronics and battery

The battery and electronics are protected within the ankle area. The integrated microprocessor processes the sensor data and controls the hydraulics in real time.

Hydraulics

The hydraulics control the plantar flexion and dorsiflexion of the foot independently of one another, thereby uniting flexibility and stability.

IMU, angle and moment sensor

Movements and forces that occur are recorded by the IMU (inertial motion unit), angle and moment sensors. They provide important information to the microprocessor regarding the user’s situation and gait pattern in order to adapt the Meridium accordingly. This enables the differentiation between standing and walking on level ground as well as on stairs and ramps and the activation of the energy-saving functions, e.g. when sitting.

Ankle spring

Made from extremely stable yet lightweight titanium, connects the hydraulics in the foot with the pyramid and encloses the electronics and battery in the ankle.

Frame and heel spring

The frame and heel spring made from carbon fibre stand out for their high stability and stiffness and also help to protect the hydraulics. The heel spring dampens the step at heel strike.

Toe plate

The toe plate made from aluminium with an abducted big toe also forms the link between the carbon frame and the frontal pivot point of the hydraulics. Due to its mobility, very good ground contact is guaranteed during rollover.

1B1-2 - Foot

Meridium

Blaze new trails.

The Meridium prosthetic foot was specially designed for moderately active users who navigate varied indoor and outdoor environments and place a high value on intuitive adaptation that replicates natural movement.

  • Constant adaptations within the foot adjust to changes in terrain like uneven ground and slopes
  • The microprocessor controls the smooth hydraulic rollover and makes walking feel effortless
  • Automatic heel height adjustment for easy shoe changes

It's more than a prosthetic foot. It’s a foundation.

Product typeMicroprocessor controlled feet with dynamic ankle rotation
Mobility grade2, 3
Max. body weight125 kg

Meridium

The Meridium prosthetic foot was specially designed for moderately active users who navigate varied indoor and outdoor environments and place a high value on intuitive adaptation that replicates natural movement.

  • Constant adaptations within the foot adjust to changes in terrain like uneven ground and slopes
  • The microprocessor controls the smooth hydraulic rollover and makes walking feel effortless
  • Automatic heel height adjustment for easy shoe changes

It's more than a prosthetic foot. It’s a foundation.

Four-axis kinematics

The four-axis kinematics enable especially good adaptation to natural movements while walking. Four axles flexibly connect the toe plate, foot and ankle with one another.

Electronics and battery

The battery and electronics are protected within the ankle area. The integrated microprocessor processes the sensor data and controls the hydraulics in real time.

Hydraulics

The hydraulics control the plantar flexion and dorsiflexion of the foot independently of one another, thereby uniting flexibility and stability.

IMU, angle and moment sensor

Movements and forces that occur are recorded by the IMU (inertial motion unit), angle and moment sensors. They provide important information to the microprocessor regarding the user’s situation and gait pattern in order to adapt the Meridium accordingly. This enables the differentiation between standing and walking on level ground as well as on stairs and ramps and the activation of the energy-saving functions, e.g. when sitting.

Ankle spring

Made from extremely stable yet lightweight titanium, connects the hydraulics in the foot with the pyramid and encloses the electronics and battery in the ankle.

Frame and heel spring

The frame and heel spring made from carbon fibre stand out for their high stability and stiffness and also help to protect the hydraulics. The heel spring dampens the step at heel strike.

Toe plate

The toe plate made from aluminium with an abducted big toe also forms the link between the carbon frame and the frontal pivot point of the hydraulics. Due to its mobility, very good ground contact is guaranteed during rollover.

Benefits at a glance

Meridium – balanced stability

Ascending and descending slopes

Uphill or downhill – thanks to the Meridium’s ability to adapt, you can manage inclined surfaces effortlessly from the very first step. Increased safety thanks to more ground clearance when walking uphill, comfortable when going downhill thanks to the adapted rollover and fast full-surface ground contact.

Walking on uneven terrain

The Meridium adapts to the terrain with every step. From cobblestones, to grass, to forest paths – it offers a high level of stability on different types of terrain thanks to real-time adjustment and improved ground contact.

Going down stairs

The Meridium prosthetic foot lets you place your entire foot on the step as you go down stairs. Instead of thinking about positioning your foot correctly, you can concentrate on your surroundings.

Stable standing

The Meridium intuitively identifies when you are no longer moving and require a secure, stable stance – even on slopes or uneven terrain.

Relief when sitting

When sitting, the Meridium prosthetic foot lowers itself to the floor, which achieves a more natural-looking foot position and can also help relieve your residual limb.

Automatic heel height adjustment

Whether you are barefoot or wearing flat soles or heels – thanks to automatic heel height adjustment, shoes can be changed quickly and easily with the Meridium prosthetic foot.

The Cockpit app – easy mobile control

The Meridium adjusts itself automatically to diverse situations. You can easily adjust the Meridium via a smartphone using the convenient Cockpit app for iOS and Android devices. The app can be used to change the heel height, for example, or to select from a range of preset MyModes. The app also displays additional information such as the charge level of your mechatronic prosthetic foot.

More than a foot. A foundation.

The prosthetic foot makes a difference in the success of your treatment. Learn more about prosthetic feet in general and our other foot options here.

User Experience

Moving ahead with confidence

Hans

Hans has many talents, but this is the first time he’s been able to make the most of his abilities. Whether playing an instrument, drawing or helping to decorate his new home, Hans loves being in the middle of the action. He wears the Meridium prosthetic foot – but it’s hardly noticeable to him or those around him.

Functionality

Stride adjustment in real time

1) The resistance is adjusted when the foot touches the floor to achieve comfortable heel leverage that matches the user’s stride length.

2) Based on the individually adjusted resistance, the speed of plantar flexion immediately adapts to the gait situation with every step.

3) Thanks to the high degree of mobility and real-time adjustment during rollover, you benefit from prolonged, full-surface contact with the ground for the greatest possible stability and excellent traction.

4) The movable toe plate provides a large contact surface and ensures uniform pressure distribution in the forefoot area when rolling over the toes. The Meridium’s four axles give you a smoother, more natural gait pattern when rolling over the foot.

5) When your foot lifts from the floor, it remains in a rolled over position and thereby offers an enhanced level of safety as you walk.

Meridium – functions and benefits 1

The Meridium prosthetic foot offers extensive real-time adaptation to various situations, surfaces and heel heights and enables a nearly natural gait pattern. The video shows the functions and benefits based on simple sketches with user Hans.

Meridium – functions and benefits 2

The Meridium prosthetic foot offers extensive real-time adaptation to various situations, surfaces and heel heights and enables a nearly natural gait pattern. The video demonstrates the key functions and benefits.

Specifications

Product information

Product typeMicroprocessor controlled feet with dynamic ankle rotation
Mobility grade2, 3
Max. body weight125 kg
Amputation levelTransfemoral amputation, Knee disarticulation, Transtibial amputation

Product Data

Mobility grade2, 3
Max. body weight125 kg
Sideleft (L), right (R)
Size24-29 cm
Weight (without footshell)1330 g
Footshell colourSkin colour 1, Skin colour 4, Skin colour 15
Weight with normal footshell1485 g*
System height with normal footshell142 mm*
Build height with normal footshell160 mm*
Downloads

Documents

Instructions for use
1B1-2Instructions for use

647H64-1=ALL_INT

Instructions for use (user)| 1B1-2 Meridium
Download (English, PDF 7 MB) Instructions for use
1B1-2Instructions for use

647H64-2=ALL_INT

Instructions for use (user)| 1B1-2 Meridium
Download (English, PDF 7 MB) Instructions for use
1B1-2Instructions for use

647G1441-0=ALL_INT

Instructions for use (qualified personnel) | 1B1-2=* Meridium
Download (Românesc, PDF 10 MB) Instructions for use
1B1-2Instructions for use

647G1441=ALL_INT

Instructions for use [short] (qualified personnel) | 1B1-2=* Meridium
Download (English, PDF 621 KB) Instructions for use
Others
1B1-2Others

647G1441=ALL_INT

Instructions for use [short] (qualified personnel) | 1B1-2=* Meridium
Download (English, PDF 688 KB) Others
Declaration of Conformity
1B1-2Declaration of Conformity

4136674

Declaration of Conformity for 1B1-2
Download (English, PDF 679 KB) Declaration of Conformity
FAQS

Answers for you

Is the Meridium prosthetic foot right for me?

The Meridium is suitable for moderately active users (mobility grade 2–3). It is approved for a body weight of up to 125 kg and available in foot sizes 24–29. Both transfemoral and transtibial amputees can benefit from the prosthetic foot.

The Meridium prosthetic foot is not suitable for highly active users and sports.

Is the Meridium waterproof?

No, the Meridium is not waterproof! However, the footshell protects the prosthetic foot against splashed water. So a sudden rain shower is no problem.

How long does the battery last, and what happens when it is drained?

We recommend charging the Meridium prosthetic foot overnight when used on a daily basis. A vibration signal warns you in a timely manner when the battery charge level becomes low. Once it is drained entirely or if the power supply fails, the Meridium automatically switches to safety mode with preset resistance parameters.

What do I have to do if the Meridium emits pulsing vibrations?

If the Meridium vibrates during use, this means there is an error. Vibrations at five-second intervals indicate overheating of the hydraulics, which may occur during continuous increased activity (such as walking downhill for an extended period). Please stop your activity immediately and allow the hydraulics to cool down until the vibration stops. Full activity may be resumed after the vibration stops.

Can I test the Meridium prosthetic foot?

Yes, you can test the Meridium prosthetic foot. Many certified medical supply companies offer a trial fitting. Just talk to your O&P professional. The trial fitting takes place over a predetermined period of time and is monitored by Ottobock when needed.

Contact

How can we help you?