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- Title
Using Ultrasound Scans to Measure Longitudinal Growth of Magnetically Controlled Growing Rods.
- Authors
Mohamed, Mohamed; Brown, Philip; Munigangaiah, Sudarshan; Bruce, Colin; Trivedi, J. M.; Davidson, N. T.
- Abstract
Background: Magnetically controlled growing rods (MCGR) are used in the management of early onset scoliosis. Unlike traditional spinal rods these can be extended in clinic negating the need for repeat surgery, unfortunately as a result this predisposed the growing child to repeat radiographs and ionizing radiation. However, we propose that ultrasound scans can be used to effectively measure the extension obtained thus reducing the number of radiographs required. Method: This is a retrospective review of all the patients who have had MCGR at Alder Hey Hospital. Standardised method was used to assess rod extension using ultrasonography and radiographs. Inter-observer and intra-observer assessment was performed. Patients were reviewed every 3. Magnetically controlled extension was undertaken at each follow up followed by ultrasonography and radiograph measurement. Result: 30 patients (16 female and 14 males) with average age 7.6 years (4-12) underwent MCGR surgery. 6 patients were excluded (1 fractured rod, 1 infection and 4 had recent surgery and did not have radiographs). Linear regressions analysis showed perfect fit between XR and US measurements at each time point (R2 0.723). The two measurements distribution was not different (p 0.001). Conclusion: Magnetically controlled growing rods can reduce the number of repeat surgeries for children and thus has a psychological benefit for the patient and family. Ultrasonography is comparable to radiographs in the assessment of magnetic rod extension and can be used instead to reduce the exposure to ionizing radiation. We use ultrasonography every 3 months to assess rod extension and only get radiographs every 9 moths for assessment of overall spinal position
- Publication
Global Spine Journal, 2018, Vol 8, p146S
- ISSN
2192-5682
- Publication type
Article
- DOI
10.1177/2192568218771030