Use of Frequency Measurement to Assess Ilizarov Wire Tension for Education and Training Purposes

Transosseous Ilizarov wire constructs are extensively used in the treatment of fractures, deformity correction, and limb lengthening. Obtaining satisfactory construct stability through correct wire tensioning remains essential for bone healing. The inaccuracies and inefficiencies of calibrated tensioning devices are well documented; whilst non-calibrated tensioning methods must rely on operator 'feel'. Mastering and maintaining the skills for non-calibrated wire tensioning is challenging given the inability to easily measure wire tension.This study aimed to (1) describe a novel method for Ilizarov wire tension measurement; and (2) evaluate this novel method by examining the wire tensioning practises of subspecialty experts.

Firstly, a smartphone and app were validated to accurately measure defined soundwave frequencies. An online calculator was then created using a modified Euler-Bernoulli equation for a thin beam under axial tension to calculate wire tensions from excited wire frequencies.Secondly, an evaluation of the novel method was performed where the wire tensioning skills of experienced surgeons were examined.

The novel smartphone wire frequency measuring technique and accompanying online wire tension calculator were accurate, simple, and efficient to employ.The technique evaluation successfully assessed the wire tensioning techniques of senior Ilizarov apparatus surgeons.

Aspiring surgeons seeking to master non-calibrated Ilizarov wire tensioning techniques may now benefit from the described method, obtaining immediate feedback and allowing for accelerated skills training. In addition, experienced surgeons may audit and refine their wire tensioning practises. The application may be expanded in further studies to assess novel techniques and devices.

Russell SP. Use of Frequency Measurement to Assess Ilizarov Wire Tension for Education and Training Purposes. Strategies Trauma Limb Reconstr 2024;19(3):125-130.