STUDY DESIGN: Retrospective study. OBJECTIVES: To analyze the influence of preoperative brace treatment on the pulmonary function tests (PFTs) in females with adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND: Brace is a selection of conservative treatment for some patients with AIS. Some authors reported that wearing a brace could impair the PFTs, although there are no reports that analyze the related factors. METHODS: Preoperative PFTs were evaluated in 270 female patients with AIS. The patients were classified into 2 groups: group A, with preoperative brace treatment, 70 cases; and group B, without preoperative brace treatment, 200 cases. The differences of the PFTs between the 2 groups were compared. RESULTS: The predicted values of forced vital capacity (FVC) and forced expiratory volume in 1 s (FEV1) in group A and B were 3.26 L and 3.20 L, 2.78 L and 2.73 L, respectively, (both P>0.05). The actual values of FVC and FEV1 in group A and B were 2.61 L and 2.72 L, 2.37 L and 2.48 L, respectively, (both P>0.05). The percentage of actual value and predicted value of FVC(FVC%) and FEV1(FEV1%) in group A and B were 80.6% and 85.2%, 85.7% and 91.1%, respectively, and group A had significantly lower values when compared with those of group B (both P<0.05). This difference was significant in patients with a primary thoracic curve (166 cases) (P<0.05), whereas not in patients with a primary thoracolumbar/lumbar curve (104 cases) (P>0.05). In group A, there were significant correlations between the sagittal Cobb angle of the thoracic curve and the actual values of FVC and FEV1 and FVC% and FEV1% (both P<0.05). CONCLUSIONS: Preoperative brace treatment can reduce the FVC% and FEV1% in thoracic AIS. The sagittal Cobb angle of the thoracic curve may be the influential factors.
STUDY DESIGN: Retrospective study. OBJECTIVES: To analyze the influence of preoperative brace treatment on the pulmonary function tests (PFTs) in females with adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND: Brace is a selection of conservative treatment for some patients with AIS. Some authors reported that wearing a brace could impair the PFTs, although there are no reports that analyze the related factors. METHODS: Preoperative PFTs were evaluated in 270 female patients with AIS. The patients were classified into 2 groups: group A, with preoperative brace treatment, 70 cases; and group B, without preoperative brace treatment, 200 cases. The differences of the PFTs between the 2 groups were compared. RESULTS: The predicted values of forced vital capacity (FVC) and forced expiratory volume in 1 s (FEV1) in group A and B were 3.26 L and 3.20 L, 2.78 L and 2.73 L, respectively, (both P>0.05). The actual values of FVC and FEV1 in group A and B were 2.61 L and 2.72 L, 2.37 L and 2.48 L, respectively, (both P>0.05). The percentage of actual value and predicted value of FVC(FVC%) and FEV1(FEV1%) in group A and B were 80.6% and 85.2%, 85.7% and 91.1%, respectively, and group A had significantly lower values when compared with those of group B (both P<0.05). This difference was significant in patients with a primary thoracic curve (166 cases) (P<0.05), whereas not in patients with a primary thoracolumbar/lumbar curve (104 cases) (P>0.05). In group A, there were significant correlations between the sagittal Cobb angle of the thoracic curve and the actual values of FVC and FEV1 and FVC% and FEV1% (both P<0.05). CONCLUSIONS: Preoperative brace treatment can reduce the FVC% and FEV1% in thoracic AIS. The sagittal Cobb angle of the thoracic curve may be the influential factors.
Authors: Lucas Piantoni; Carlos A Tello; Rodrigo G Remondino; Ernesto S Bersusky; Celica Menéndez; Corina Ponce; Susana Quintana; Felisa Hekier; Ida A Francheri Wilson; Eduardo Galaretto; Mariano A Noël Journal: Scoliosis Spinal Disord Date: 2018-12-14