Most veterinary surgeons are acquainted with the Ilizarov method of circular external skeletal fixation for limb lengthening and correction of angular limb deformities. While circular external skeletal fixators have been of great interest to the veterinary surgeon, previous devices available are too expensive or poorly designed. In addition, most circular fixators have been very difficult to manage on an out-patient basis.

The goal of the IMEX® Circular External Skeletal Fixation System is to provide the veterinary surgeon with a functional and affordable circular external skeletal fixator that meets the following criteria:

  • Mechanically and biologically sound
  • Affordable and available
  • Relatively easy application and adjustment
  • Minimal required instrumentation
  • Applicable to fracture management and limb deformities

Most importantly, a system designed for out-patient limb lengthening and correction of growth deformities must be designed to simplify daily out-patient manipulations to the degree required to ensure accurate daily corrections with minimal patient morbidity.

Developed in conjunction with a group of veterinary surgeons, bioengineers, and M.D.s at a leading research center, the IMEX® Circular ESF System meets the criteria. Daily manipulations are performed around a patented (U.S. Patent # 5,968,043) Zero Tolerance/Zero Motion system that is patient- and owner-friendly. The IMEX® Circular External Skeletal Fixation System is designed to be compatible with the SK® ESF System by IMEX®, thus providing a simple, cost-effective method of hybrid frame construction.

Successful application of the circular ESF method requires training and experience. However, once well-versed with the system, surgeons will realize tremendous biological and mechanical control over many limb deformity and fracture scenarios.

Mechanical attributes and user-friendliness have made the IMEX® Circular ESF System a popular choice among private referral surgeons and academic institutes worldwide.

Various styles and sizes of rings serve as the basic structural element of circular ESF and hybrid ESF frames. IMEX® hybrid and CESF systems are divided into two basic sizes, the standard and mini.

Linear motors and threaded rods are the most common connecting elements used in the construction of circular ESF frames

A common fastening element of circular ESF and hybrid ESF frames and available in 4mm and 6mm sizes (diameters) for mini or standard frames. 

The most common fastening element of CESF and hybrid ESF frames and are available in 4mm and 6mm sizes (diameters) for mini or standard frames. 

Like many fasteners in hybrid and circular ESF frames, washers are available in two basic sizes for mini and standard sizes, as well as different styles.

Modular in nature to allow great flexibility when constructing hybrid ESF or circular ESF frames.

Combined to create hinged circular fixators for correction of angular limb deformities

Key bone fixation elements in circular fixation and most hybrid ESF frames. 

A modified small SK® clamp allowing placement anywhere along a 6mm threaded rod. 

Instrumentation required to construct CESF frames and hybrid ESF frames is minimal and consists primarily of a wire tensioner and wrenches.

Circular ESF starter kits simplify inventory selection and are available for the mini CESF system and the standard CESF system.