Many materials are suitable for socket fabrication. As is the case with other levels of lower-limb amputation, the most commonly utilized socket material is a rigid thermosetting resin: polyester or acrylic. An increasing trend toward more flexible thermoplastic materials is evident, as in other aspects of prosthetic practice. One of the authors (J.W.M.) has fitted more than two dozen polypropylene/polyethylene copolymer sockets for hip-level amputation over the past decade with good long-term results in durability, comfort, and patient acceptance (Fig 21B-14.).
The implant protrudes through the skin and allows for the direct attachment of prosthetic componentry without the requirement of a prosthetic socket. It may be utilised by upper and lower limb amputees.
LOWER LIMB PROSTHETICS - ACTIVE CARE PHYSIOTHERAPY CLINIC
We cater for all levels of lower limb amputation, utilising a broad range of techniques and technologies to help clients achieve their goals. Products include micro processor knees, Energy storing feet and cosmetic prosthesis with life like appearance.
Different Types of Lower Extremity Amputations - …
The weight-bearing prosthetic pegs (from hock to ankle) are known asintraosseous transcutaneous amputation prosthetics (ITAPs) and weredeveloped by a team from University College London led by ProfessorGordon Blunn, head of UCL's Centre for Biomedical Engineering. Itinvolves implanting a piece of titanium metal and a flange into whichbone and skin grows. The titanium implant attaches to the bone at thepoint of amputation and sticks out through the skin which moulds aroundit, mimicking the way a deer's skin and fur moulds around antlers. Theresult resembles a lower leg bone in the way it moves. Once these hadhealed fully, rubber paws were attached. These were later replaced byrubber and metal paws (thoughtfully covered in black tape to matchOscar's colour!) and Oscar was up and moving as soon as the sedativewore off. Oscar was soon walking, running and jumping like a normal catand will return to Jersey when vets are satisfied with hisrehabilitation and his treatment is complete. His access to outdoorswill have to be supervised in future because the prosthetic paws lacksensation or claws. Four pairs of longer lasting prosthetic paws hadhad to be made as active Oscar wore through the first set in weeks!
Lower Extremity Prosthesis - Lower Limb Prosthesis & Amputations
Some cats suffer hind limb paralysis following accidental injury to the spinal cord. Because the tail is an extension of the spinal cord, this is usually also paralysed. Where the damage is to the nerves controlling the hind legs or pelvic damage, the tail may be unaffected. Depending on the nature of the injury, paralysis may be temporary or permanent and may involve loss of sensation in bowel and bladder as well. Where the injury has caused the blood supply to be cut off, the vet may opt to amputate the tail and/or lower parts of the hind legs due to the risk of gangrene. Other conditions causing lack or loss of hind-limb function are pelvic deformities and spina bifida. In some extreme cases, kittens have been born without proper pelvic bones.
Socket technology for lower extremity limbs saw a ..
Many authors have noted that the rejection rates for lower-limb prostheses are the highest at these proximal levels. The energy requirements to use such prostheses has been reported to be as much as 200% of normal ambulation. At the same time, the lack of muscle power at the hip, knee, and ankle/foot results in a fixed, slow cadence. As a practical matter, only those who develop sufficient balance to ambulate with a single cane (or without any external aids at all) are likely to wear such a prosthesis long-term. Those who remain dependent on dual canes or crutches for balance eventually realize that mobility with crutches and the remaining leg, without a prosthesis, is much faster and requires no more energy expenditure than using a prosthesis does.