Article Text

NEW METHOD OF SCOLIOSIS DEFORMITY ASSESSMENT: ISIS 2 SYSTEM
  1. A Zubovic1,
  2. N Davies1,
  3. F Berryman1,
  4. N A Quraishi1,
  5. C Lavy1,
  6. G Bowden1,
  7. J Wilson-MacDonald1,
  8. J Fairbank1
  1. 1Nuffield Orthopaedic Centre, Oxford, UK

Abstract

Objective The aim of this study was to confirm that ISIS 2 three-dimensional (3D) back shape measurements are a valid and confident method of diagnosing and follow-up of patients with scoliosis.

Materials and Methods 3D back measurements were performed in our ISIS 2 laboratory. Equipment included camera/projector stand, patient stand with reference plane and a PC. Represented in clinical reports were height map, contour plot, transverse section plot, coronal plot, sagittal sections and bilateral asymmetry maps.

Results 520 scans on 242 patients were performed from February 2006 to December 2007. 58 patients were male (median age 16 years) and 184 female (median age 14.5 years). The average number of scans was 2.01/patient (range 1–10). Most common was right-sided thoracic curve. Median back length was 421 mm (CI 404.96 to 415.18). Pelvic rotation median value was 1° (CI 0.24 to 0.84). Imbalance values were median 4 mm (CI 0.98 to 3.88). Median upper lateral asymmetry was −12° (CI −12.90). Maximum skin angle measured 0°–40° (median 7°, CI 7.57 to 8.57). Median minimum skin angle was −5° (CI −6.90 to −5.91°). Median kyphosis angle was 33° (CI 32.84 to 35.28, min 0°, max 79°). Median lordosis angle was 25° (CI 24.17 to 16.95, min −41°, max 65°). For left volumetric asymmetry parameter median value was 4 (CI 7.69 to 10.27) and for the right 11 (CI 14.09 to 16.66). In 111 patients we compared ISIS 2 and radiographic measurements and found no statistically significant difference between them (p>0.05).

Conclusion ISIS 2 scoliosis measurements are non-invasive, low-cost 3D topographic back measurements that can be confidently used in scoliosis diagnosis and monitoring of curve progression.

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