Spinal Pantograph-A Non-Invasive Technique for Describing Kyphosis and Lordosis in the Thoraco-Lumbar Spine

Abstract

A spinal pantograph-a non-invasive method for describing and documenting the posture of the back in the standing position-is described. Thoracic kyphosis and lumbar lordosis can be recorded by a simple technique. A comparative study of the range of kyphosis and lordosis measured by X-ray and this mechanical device shows a statistically significant correlation. As regards the thoracic kyphosis, the spinal pantograph seems to be as accurate as the X-ray. In lumbar lordosis an underestimation is seen with the clinical device. Compared with non-scoliotic cases, a significantly decreased kyphosis is observed in structural scoliosis, even in cases with a scoliotic angle of less than 30° according to Cobb. The advantage of this spinal pantograph is that it reduces the radiation dosage. It can be used for screening and follow-up examination of the posture especially during the growing stage.