Exo - Outside (as in: Exoskeletal Prosthesis – one with external rigid fiberglass structure)

L5685 Addition to lower extremity prosthesis, below knee, ..

Above knee prostheses consist of five main components which allow the knee to bend, transmit weight and provide the individual with the potential to walk and include:The design of the prosthesis will be based on several factors, including the individual’s health, their current activity levels and future requirements.

Below Knee Amputation | Fathia Arsyiana

It is well accepted that any fluid-control mechanism (hydraulic or pneumatic) results in a smoother gait. Motion studies conducted at Northwestern University have confirmed that a more normal gait for the hip dis-articulation/transpelvic amputee is also produced. Gait analysis has demonstrated that utilization of a hydraulic knee in a hip disarticulation prosthesis results in a significantly more normal range of motion at the hip joint during the walking cycle than is possible with conventional knees. In addition, a more rapid cadence was also possible.

A third type that has proved advantageous for this level of amputation is the polycentric (four-bar) knee. Although slightly heavier than the previous two types, this component offers maximum stance-phase stability. Because the stability is inherent in the multilinkage design, it does not erode as the knee mechanism wears during use. In addition, all polycentric mechanisms tend to "shorten" during swing phase, thus adding slightly to the toe clearance at that time. Many of the endoskeletal designs feature a readily adjustable knee extension stop. This permits significant changes to the biomechanical stability of the prosthesis, even in the definitive limb. Because of the powerful stability, good durability, and realignment capabilities of the endoskeletal polycentric mechanisms, they are particularly well suited for the bilateral amputee. Patients with all levels of amputation, up to and including translumbar (hemicorporectomy), have successfully ambulated with these components.

Hip Disarticulation Prosthesis at Award Prosthetics

The prosthetic foot provides the necessary support to keep the knee stable while you stand on the prosthesis. There are a variety of types of prosthetic feet.

Amputee and Prosthetic Terminology at Award …

Advanced systems are available for amputees who wish to run. Swing phase control systems can include either pneumatic or hydraulic control systems to enable the wearer to run or vary walking speeds. Newer "high tech" knees include those with microprocessors which are adjustable throughout the life of the prosthesis, often using a laptop computer to alter them. Other lightweight knee frames include those made of graphite, which house small adjustable knee control units.

The War Amps - Living With Amputation

The knee allows the prosthesis to bend while you are standing on the foot and when taking a step forward. Prosthetic knees are designed to avoid buckling when standing and to allow the artificial leg to be advanced normally at will. Special designs can allow you to walk on uneven ground or to run and change speed. Typically younger and more active amputees wear these knees. Your prosthetist will discuss your activity level with you to allow special options to be included in the design of your prosthesis.

Blow Knee Amputation Manual | Prosthesis | Amputation

The SACH foot does not have a mechanical ankle joint but reproduces gait through standardised compression of the foam heel on the prosthetic foot. Several types of hinged feet are available that are designed to reproduce ankle and foot movements as accurately as possible.

08/04/2011 · Blow Knee Amputation Manual ..

Torque-absorbing devices are often added to hip dis-articulation/transpelvic prostheses to reduce the shear forces transmitted to the patient and components. Ideally, they are located just beneath the knee mechanism (Fig 21B-9.). This increases durability by placing the torque unit away from the sagittal stresses of the ankle while avoiding the risk of introducing swing-phase whips (which can occur if it is placed proximal to the knee axis). The major justification for such a component is that the high-level amputee has lost all physiologic joints and, hence, has no way to compensate for the normal rotation of ambulation.