External Fixation has been used in Veterinary Practice since 1934 when Otto Stader described a full pin transfixation splint in which K-wires anchored into padded wooden splints. So Fracture fixation in veterinary anatomy is still quite young – less than 85yrs old!
Positive Profile Pins are when the thread is rolled onto the shaft of the head of the pin so the inner diameter of the threaded and non-threaded regions is the same. It allows for increased resistance to pull out and eliminates the stress risers at the junction between the thread and non-thread.
Currently there is a trend to move away from the philosophy of rigid anatomical reduction when dealing with many types of diaphyseal fractures. The more minimally invasive approach with healing via a callus is is preferred and ESF offers a cost effective means to apply this principle.
The pin-bone interface is considered to be the major factor in frame design. Problems occur with the insertion technique, if the incorrect frame is chosen or if the incorrect pin is chosen. Stress at the pin-bone interface will cause bone resorption, followed by pin loosening, pin tract discharge and premature frame loosening or pin hole fracture.
In radial fractures the Type 1b ESF is a versatile and strong frame for use. It usually sits craniomedially and craniolaterally an is linked by one or two transverse articulations. It avoids the problem of placing pins through the narrowest part of the craniocaudally compressed radius. It is one of the most commonly applied ESF frame.
Update Your External Fixation Skills With Vetprac
A thorough understanding of the biomechanical principles of external fixation is useful for all orthopedic surgeons as most will have to occasionally mount a fixator throughout their career. A bone or joint can be stabilised relatively easily and the patients care can be managed without considerable cost. Learning how to avoid damage to vital structures, allow access to the area of injury, and meet the mechanical demands of the patient and the injury, can be challenging. This workshop will bridge the gap between learning and doing.
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