Pulmonary Function Improves in Patients with Adolescent Idiopathic Scoliosis who Undergo Posterior Spinal Fusion Regardless of Thoracoplasty: A Mid-Term Follow-Up

Pulmonary Function Improves in Patients with Adolescent Idiopathic Scoliosis who Undergo Posterior Spinal Fusion Regardless of Thoracoplasty: A Mid-Term Follow-Up

Introduction: The purpose of the present study was to determine, in a mid-term follow-up 5 years or more after surgery, the forced vital capacity (FVC), forced expiratory volume in 1 s (FEV1), and expiratory flow in patients with adolescent idiopathic scoliosis (AIS) who underwent posterior spinal f...

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Published in:Spine Surgery and Related Research 2021/01/27, Vol.5(1), pp.22-27
Main Authors: Akazawa, Tsutomu, Kotani, Toshiaki, Sakuma, Tsuyoshi, Nakayama, Keita, Iijima, Yasushi, Torii, Yoshiaki, Iinuma, Masahiro, Kuroya, Shingo, Asano, Kota, Ueno, Jun, Yoshida, Atsuhiro, Murakami, Kenichi, Minami, Shohei, Orita, Sumihisa, Inage, Kazuhide, Shiga, Yasuhiro, Nakamura, Junichi, Inoue, Gen, Miyagi, Masayuki, Saito, Wataru, Eguchi, Yawara, Fujimoto, Kazuki, Takahashi, Hiroshi, Ohtori, Seiji, Niki, Hisateru
Format: Article
Language:eng
Subjects:
adolescent idiopathic scoliosis
expiratory flow
Original
pulmonary function
thoracoplasty
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Summary:Introduction: The purpose of the present study was to determine, in a mid-term follow-up 5 years or more after surgery, the forced vital capacity (FVC), forced expiratory volume in 1 s (FEV1), and expiratory flow in patients with adolescent idiopathic scoliosis (AIS) who underwent posterior spinal fusion (PSF) with or without thoracoplasty.Methods: The subjects were 134 patients with AIS who underwent PSF between 2004 and 2013. Forty-five patients agreed to participate in the study. We divided the patients into two groups as follows: 24 patients who underwent PSF with thoracoplasty from 2004 to 2010 in the TP group and 21 patients who underwent PSF without thoracoplasty from 2011 to 2013 in the non-TP group. We evaluated whole spine X-ray imaging and pulmonary function tests (PFTs) in these patients. PFTs measured FVC, FEV1, peak expiratory flow (PEF), maximum expiratory flow at 50% FVC (V50), maximum expiratory flow at 25% FVC (V25), and the ratio of V50 to V25 (V50/V25).Results: The main thoracic curves were 53.6 ± 10.1° before surgery, 19.8 ± 7.6° 1 week after surgery, 22.3 ± 8.3° 2 years after surgery, and 23.3 ± 7.6° at the most recent observation. Compared with preoperative values, FVC, FEV1, and % FEV1 were improved significantly at the most recent observation. No significant difference was observed between % FVC before surgery and at the most recent observation. Compared with preoperative values, PEF, V50, and V25 were improved significantly at the most recent observation. V50/V25 did not change significantly. The changes in PFT values in the TP group and the non-TP group were compared. No significant differences were observed in FVC, % FVC, FEV1, % FEV1, PEF, V50, or V25.Conclusions: Regardless of whether thoracoplasty was performed or not, FVC, FEV1, and expiratory flow were improved 5 years or later after PSF.
ISSN:2432-261X
2432-261X