ASKyphoplan

A Program for Deformity Planning in Ankylosing Spondylitis.

ASKyphoplan is a program for deformity planning in ankylosing spondylitis (AS). A Pedicle Subtraction Osteotomy (PSO) or closing wedge osteotomy of the lumbar spine may be considered to correct posture and spinal balance in progressive thoracolumbar kyphotic deformity caused by AS. Adequate deformity planning is essential for reliable prediction of the effect of surgical correction of the spine on the sagittal balance and view angle. The effect of a lumbar osteotomy in AS on the clinical view angle and the sagittal balance of the spine can be expressed by a mathematical equation.

ASKyphoplan is a computational program that analyses and visualises the planning procedure for sagittal plane corrective osteotomies of the lumbar spine in AS , which can be used easily in daily practice. The relationship between the planned correction angle, level of osteotomy, and sagittal balance are coupled into the program. The software can be used free of charge.

Reference list:
●Van Royen BJ, De Gast A, Smit ThH. Deformity planning for sagittal plane corrective osteotomies of the spine in ankylosing spondylitis. Eur Spine J 2000;9:492-498
●Van Royen BJ, Scheerder FJ, Jansen E, Smit TH. ASKyphoplan. A Program for deformity planning in Ankylosing spondylitis. Eur Spine J. 2007 Sep;16(9):1445-9.
●Van Royen BJ, Kastelijns RCA, Noske DP, Oner FC, Smit TH. Transpedicular wedge resection osteotomy for the treatment of a kyphotic Andersson lesion complicating anlylosing spondylitis. Eur Spine J 2006;15:246-252
●Pigge RR, Scheerder FJ, Smit TH, Mullender MG, van Royen BJ. The effectiveness of pre-operative planning for restoration of balance and view in Ankylosing Spondylitis. Neurosurg Focus. 2008;24(1):E7

Owners:
B.J. Van Royen, MD PhD, Professor in Orthopaedic surgery.
T.H. Smit, PhD, Professor of Translational Regenerative Medicine.
E. Jansen, Software Developer.

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