The use of photogrammetry to evaluate chest wall after arthrodesis in patients with Adolescent Idiopathic Scoliosis

Abstract

Introduction: Adolescent Idiopathic Scoliosis (AIS) is a three-dimensional spine deformity that creates changes in the rib cage biomechanics. Objective: Evaluate changes on the chest wall, quality of life and lung function on the preoperative and postoperative of arthrodesis in patients with AIS. Methods: Eighteen AIS patients with surgical indication for arthrodesis of both sexes aged between 11 and 18 years were evaluated. The evaluation of the chest was taken by using photogrammetry Postural Assessment Software (PAS). Thoracic markers were created using angles (A) and distances (D): A1 (bilateral acromion/manubrium), A2 (bilateral acromion/xiphoid process), A3 (bilateral rib/xiphoid process), A5 (acromion/scapula inferior angle/inframammilary), A6 (C7/acromion/T3), A7 (scapular irregularity) and D3 (xiphoid process to the anterior superior iliac spine). Spirometry and assessment of Quality of Life Questionnaire (SRS - 30) was performed. Evaluations were performed on the preoperative period (PRE), on two months of postoperative (PO1) and on the late postoperative period (LPO). Data were analysed using analysis of variance with repeated measures and Bonferroni method comparisons. Results: The thoracic markers A1, A2, A3, A5, A6, A7 and D3 showed significant difference in the LPO. All domains and the total score of the SRS - 30 questionnaire showed significant increase in periods PO1 and LPO. The FVC and FEV1 showed significant increase in the LPO. Conclusion: After arthrodesis patients with AIS showed alterations in the chest wall, associated with improved quality of life and lung function, especially in the late postoperative period.