{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T14:50:25Z","timestamp":1787755825167,"version":"build-2784847793"},"reference-count":42,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"22","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2023,11,15]]},"abstract":"\n Background:<\/jats:title>\n The purpose of the present study was to evaluate changes in pulmonary function, caused by preoperative halo-pelvic traction (HPT) for the treatment of extremely severe and rigid kyphoscoliosis, with use of 3-dimensional computed tomography (3D-CT) reconstruction and pulmonary function tests (PFTs).<\/jats:p>\n <\/jats:sec>\n \n Methods:<\/jats:title>\n Twenty-eight patients with severe and rigid scoliosis (Cobb angle, >100\u00b0) underwent preoperative HPT and staged posterior spinal fusion. CT, radiographic assessment, and PFT were performed during pre-traction and post-traction visits. The changes in total lung volume were evaluated with use of 3D-CT reconstruction, and the changes in pulmonary function were evaluated with PFTs at each time point. Differences were analyzed with use of 2-tailed paired Student t tests, and correlations were analyzed with use of Spearman rank tests.<\/jats:p>\n <\/jats:sec>\n \n Results:<\/jats:title>\n None of the patients had pulmonary complications during traction, and all radiographic spinal measurements improved significantly after HPT. The main Cobb angle was corrected from 143.30\u00b0 \u00b1 20.85\u00b0 to 62.97\u00b0 \u00b1 10.83\u00b0 between the pre-traction and post-traction evaluations. Additionally, the C7-S1 distance was lengthened from 280.48 \u00b1 39.99 to 421.26 \u00b1 32.08 mm between the pre-traction and post-traction evaluations. Furthermore, 3D lung reconstruction demonstrated a notable increase in total lung volume (TLV) (from 1.30 \u00b1 0.25 to 1.83 \u00b1 0.37 L) and maximum lung height (from 176.96 \u00b1 27.44 to 202.31 \u00b1 32.45 mm) between the pre-traction and post-traction evaluations. Moreover, PFTs showed that total lung capacity (TLC) improved between the pre-traction and post-traction evaluations (from 2.06 \u00b1 0.32 to 2.98 \u00b1 0.82 L) and that the changes in T1-T12 distance and maximum lung height were correlated with changes in TLV (p = 0.0288 and p = 0.0007, respectively).<\/jats:p>\n <\/jats:sec>\n \n Conclusions:<\/jats:title>\n The application of HPT is a safe and effective method for improving pulmonary function in patients with extremely severe and rigid scoliosis before fusion surgery. The TLV as measured with CT-based reconstruction was greatly increased after HPT, mainly because of the changes in thoracic height.<\/jats:p>\n <\/jats:sec>\n \n Level of Evidence:<\/jats:title>\n \n Therapeutic\n Level IV<\/jats:underline>\n . See Instructions for Authors for a complete description of levels of evidence.\n <\/jats:p>\n <\/jats:sec>","DOI":"10.2106\/jbjs.23.00035","type":"journal-article","created":{"date-parts":[[2023,9,21]],"date-time":"2023-09-21T14:55:52Z","timestamp":1695308152000},"page":"1793-1800","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":12,"title":["Evaluation of Pulmonary Function After Halo-Pelvic Traction for Severe and Rigid Kyphoscoliosis Utilizing CT with 3D Reconstruction"],"prefix":"10.2106","volume":"105","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4517-4293","authenticated-orcid":false,"given":"Lijin","family":"Zhou","sequence":"first","affiliation":[{"name":"Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, Beijing, People\u2019s Republic of 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People\u2019s Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3893-2570","authenticated-orcid":false,"given":"Chaofan","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, Beijing, People\u2019s Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5812-7803","authenticated-orcid":false,"given":"Yiqi","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, Beijing, People\u2019s Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7206-325X","authenticated-orcid":false,"given":"Yong","family":"Hai","sequence":"additional","affiliation":[{"name":"Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical 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