The PFTs do not correlate with the degree of axial deformity. Researchers analyzed data from a large multicenter database of 858 surgically treated AIS patients. Patients with MT curves greater than 70 degrees, proximal thoracic curves greater than 30 degrees and T5-T12 kyphosis less than 10 degrees had significantly lower forced expiratory volume in one second.
Juvenile-onset patients had greater PFT impairment than AIS patients and patients who were braced before surgery had worse PFTs than those who hadn’t undergone pre-surgical treatment.
Read the abstract about pulmonary function in AIS patients.
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