Ilizarov apparatus

Frbiz Site


History


Horse in harness with a shaft bow (decorated arch standing behind the horse's head)


Professor Gavril Abramovich Ilizarov invented this procedure in the 1950s after having to treat orthopedic conditions in the Kurgan region of Siberia. The procedure, and the first apparatus he designed for it, was inspired by a shaft bow harness on a horse carriage. Originally bicycle parts were used for the frame.
ultra test strip


This novel technique was introduced to the West in the 1980s, predominantly via Italian surgeons. It gained popularity in the 1990s, and has been used successfully by many surgeons throughout the world. In most developing countries it is a highly specialised technique used mainly for deformity correction by experienced surgeons due to its complexity. Further development of the ring construct led to the Taylor Spatial Frame which is more versatile and far easier to use, but very costly. Though nowadays intramedullary limb lengthening devices are also available, they are not suitable for deformity correction of bones.
medical exam gloves


Bone Lengthening/Reshaping Procedure


The device is a specialized form of external fixator, a circular fixator, modular in construction. Stainless steel rings are fixed to the bone via stainless heavy-gauge wire (called "pins" or Kirschner wires). The rings are connected to each other with threaded rods attached through adjustable nuts. The circular construction and tensioned wires of the Ilizarov apparatus provide far more structural support than the traditional monolateral fixator system. This allows early weightbearing. The frame can be used to support a fractured limb, but it is most commonly used to correct deformity through distraction osteogenesis.


The procedure consists of an initial surgery, during which the bone is surgically fractured and the ring apparatus is attached. As the patient recovers, the fractured bone begins to grow together. While the bone is growing, the frame is adjusted by means of turning the nuts, thus increasing the space between two rings. As the rings are connected to opposite sides of the fracture, this adjustment, done four times a day, moves the now-healing fracture apart by approximately one millimeter per day. The incremental daily increases result in a considerable lengthening of the limb over time. Once the lengthening phase is complete, the apparatus stays on the limb for a consolidation period. The patient is able to fully weight bear on the Ilizarov frame, using crutches initially and pain is lessened. Once healing is complete, a second surgery is necessary to remove the ring apparatus. The result is a limb that is significantly longer. Additional surgery may be necessary, in the case of leg lengthening, to lengthen the Achilles tendon to accommodate the longer bone length. The major advantage of this procedure is that because the apparatus provides complete support while the bone is recovering the patient can remain active aiding recovery.


A further use is of bone transport, whereby a defect in a long bone can be treated by transporting a segment of bone, whilst simultaneously lengthening regenerate to reduce the defect and finally dock with the other segment, producing a single bony unit.


While the Ilizarov apparatus is minimally invasive (no large incisions are made,) it is not free of complications. Pain is common and can be severe, but is treatable with analgesics. Careful attention to cleaning and hygiene is necessary to prevent pin site infection. Other complications include swelling and muscle transfixion.


Bone Fracture Treatment Procedure


The Ilizarov method is widely used to treat complex and/or open bone fractures. This method is preferred over conventional treatment options (such as internal fixator or cast) where there is a high risk of infection or the fracture is of such severity that internal fixators are unworkable.


Images (Case Study)


The following case study illustrates the Ilizarov apparatus treatment procedure for a fractured limb. The photographs are of the same patient during the course of treatment.


X-Ray of fracture and initial external fixator applied within 24 hours of patient's admission to hospital.


Front-left view of Ilizarov apparatus treating fractured tibia and fibula. Patient suffered open fracture. Fracture is located slightly above black metal ring. Photographs 1 through 4 are taken four weeks following fracture and two weeks following installation of Ilizarov apparatus.


Front (top) view with view of healthy leg. Patient is lying on his stomach.


View of several pin sites (two weeks following surgery).


X-Ray of fracture site immediately following application of Ilizarov method.


X-Ray of fracture site, part 1 (two months following fracture).


X-Ray of fracture site, part 2 (two months following fracture).


X-Ray of fracture site (three months following fracture). Note formation of bone callus around fracture site.


X-Ray of fracture site, part 2 (three months following fracture). Note formation of bone callus around fracture site.


X-Ray of fracture site, part 2 (four months following fracture).


See also


Bone healing


Fibrocartilage callus


Osteoporosis


Stress fracture


Blowout fracture


Distraction osteogenesis


Osteogenesis Imperfecta


Pseudarthrosis


References


^ S. Robert Rozbruch, Svetlana Ilizarov, ed (2007). Limb lengthening and reconstructive surgery. CRC Press. pp. 35. ISBN 0849340519. http://books.google.com/books?id=wxYt9aoztYoC&pg=PA3&dq=shaft+bow. 


External links


Dr. Dror Paley Informational site (Ortho conditions section includes video of Ilizarov methods) .


Living with an Ilizarov/Taylor Spatial Frame UK newspaper article


ilizarov.com (English)


The ILIZAROV frame wearer's support group


More information and pictures about the Ilizarov surgical technique


Institute for Limb Lengthening and Reconstruction


Taylor Spatial Frame


Legs lengthening and correction with Ilizarov frame


Categories: Orthopedic surgery | Surgical instruments | Soviet inventions | Science and technology in the Soviet UnionHidden categories: Articles needing cleanup from May 2009 | All pages needing cleanup