Change in Line of Sight after Corrective Surgery of Adult Spinal Deformity Patients: A 2-Year Follow-up
Study Design Cohort study. Purpose There is currently no published study that focuses on the spinal corrective surgery effects with cranial parameters in adult spinal deformity (ASD) patients. It is an important factor to measure since it plays a critical role in maintaining the line of sight. The o...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Korean Spine Society
2023-04-01
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| Series: | Asian Spine Journal |
| Subjects: | |
| Online Access: | http://www.asianspinejournal.org/upload/pdf/asj-2021-0256.pdf |
| _version_ | 1797835742771150848 |
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| author | Ken Jeffrey Magcalas Shin Oe Yu Yamato Tomohiko Hasegawa Go Yoshida Tomohiro Banno Hideyuki Arima Yuki Mihara Hiroki Ushirozako Tomohiro Yamada Koichiro Ide Yuh Watanabe Yukihiro Matsuyama |
| author_facet | Ken Jeffrey Magcalas Shin Oe Yu Yamato Tomohiko Hasegawa Go Yoshida Tomohiro Banno Hideyuki Arima Yuki Mihara Hiroki Ushirozako Tomohiro Yamada Koichiro Ide Yuh Watanabe Yukihiro Matsuyama |
| author_sort | Ken Jeffrey Magcalas |
| collection | DOAJ |
| description | Study Design Cohort study. Purpose There is currently no published study that focuses on the spinal corrective surgery effects with cranial parameters in adult spinal deformity (ASD) patients. It is an important factor to measure since it plays a critical role in maintaining the line of sight. The objective is to determine the change in cranial parameters using the slope of McGregor’s line (McGS) after ASD surgery after 2 years of follow-up. Overview of Literature A study concluded that cervical spine alignment (C2–C7 lordosis) is strongly affected by thoracic kyphosis (TK). Another study showed that patients with ascending gaze had significantly more thoracolumbar malalignment. Methods This retrospective study includes 295 corrective surgery patients with ASD. Subjects were divided into two groups after propensity age matching analysis: cranial malalignment (McGS <−8 or >13) and normal cranial alignment (−8≤ McGS ≤13). Lumbar lordosis (LL), pelvic tilt (PT), TK, cervical lordosis (CL), and sagittal vertical axis (SVA) were evaluated between the two groups. Results SVA (95–56 mm) and PT (34°–25°) decreased and LL (19°–41°) increased 2 years after surgery (p<0.05), but McGS (−1.1° to −0.5°) and CL (21°–19°) did not change. Conversely, in the group with cranial malalignment, SVA (120–64 mm), PT (35°–26°), and LL (12°–41°) showed similar results to the normal cranial parameter group 2 years after surgery, but in contrast, McGS (−13° to −2°) and CL (24°–18°) improved significantly. Conclusions Severe ASD adversely affects to maintain horizontal gaze but can be improved by spinal corrective surgery. |
| first_indexed | 2024-04-09T14:58:34Z |
| format | Article |
| id | doaj.art-63a3bdbc825042a98e8d9962f8e55351 |
| institution | Directory Open Access Journal |
| issn | 1976-1902 1976-7846 |
| language | English |
| last_indexed | 2024-04-09T14:58:34Z |
| publishDate | 2023-04-01 |
| publisher | Korean Spine Society |
| record_format | Article |
| series | Asian Spine Journal |
| spelling | doaj.art-63a3bdbc825042a98e8d9962f8e553512023-05-01T23:47:49ZengKorean Spine SocietyAsian Spine Journal1976-19021976-78462023-04-0117227228410.31616/asj.2021.02561496Change in Line of Sight after Corrective Surgery of Adult Spinal Deformity Patients: A 2-Year Follow-upKen Jeffrey Magcalas0Shin Oe1Yu Yamato2Tomohiko Hasegawa3Go Yoshida4Tomohiro Banno5Hideyuki Arima6Yuki Mihara7Hiroki Ushirozako8Tomohiro Yamada9Koichiro Ide10Yuh Watanabe11Yukihiro Matsuyama12 Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan Department of Orthopaedic Surgery and Division of Geriatric Musculoskeletal Health, Hamamatsu University School of Medicine, Hamamatsu, Japan Department of Orthopaedic Surgery and Division of Geriatric Musculoskeletal Health, Hamamatsu University School of Medicine, Hamamatsu, Japan Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, JapanStudy Design Cohort study. Purpose There is currently no published study that focuses on the spinal corrective surgery effects with cranial parameters in adult spinal deformity (ASD) patients. It is an important factor to measure since it plays a critical role in maintaining the line of sight. The objective is to determine the change in cranial parameters using the slope of McGregor’s line (McGS) after ASD surgery after 2 years of follow-up. Overview of Literature A study concluded that cervical spine alignment (C2–C7 lordosis) is strongly affected by thoracic kyphosis (TK). Another study showed that patients with ascending gaze had significantly more thoracolumbar malalignment. Methods This retrospective study includes 295 corrective surgery patients with ASD. Subjects were divided into two groups after propensity age matching analysis: cranial malalignment (McGS <−8 or >13) and normal cranial alignment (−8≤ McGS ≤13). Lumbar lordosis (LL), pelvic tilt (PT), TK, cervical lordosis (CL), and sagittal vertical axis (SVA) were evaluated between the two groups. Results SVA (95–56 mm) and PT (34°–25°) decreased and LL (19°–41°) increased 2 years after surgery (p<0.05), but McGS (−1.1° to −0.5°) and CL (21°–19°) did not change. Conversely, in the group with cranial malalignment, SVA (120–64 mm), PT (35°–26°), and LL (12°–41°) showed similar results to the normal cranial parameter group 2 years after surgery, but in contrast, McGS (−13° to −2°) and CL (24°–18°) improved significantly. Conclusions Severe ASD adversely affects to maintain horizontal gaze but can be improved by spinal corrective surgery.http://www.asianspinejournal.org/upload/pdf/asj-2021-0256.pdfline of sightadult spinal deformityslope of mcgregor’s linehorizontal gazecranial parameters |
| spellingShingle | Ken Jeffrey Magcalas Shin Oe Yu Yamato Tomohiko Hasegawa Go Yoshida Tomohiro Banno Hideyuki Arima Yuki Mihara Hiroki Ushirozako Tomohiro Yamada Koichiro Ide Yuh Watanabe Yukihiro Matsuyama Change in Line of Sight after Corrective Surgery of Adult Spinal Deformity Patients: A 2-Year Follow-up Asian Spine Journal line of sight adult spinal deformity slope of mcgregor’s line horizontal gaze cranial parameters |
| title | Change in Line of Sight after Corrective Surgery of Adult Spinal Deformity Patients: A 2-Year Follow-up |
| title_full | Change in Line of Sight after Corrective Surgery of Adult Spinal Deformity Patients: A 2-Year Follow-up |
| title_fullStr | Change in Line of Sight after Corrective Surgery of Adult Spinal Deformity Patients: A 2-Year Follow-up |
| title_full_unstemmed | Change in Line of Sight after Corrective Surgery of Adult Spinal Deformity Patients: A 2-Year Follow-up |
| title_short | Change in Line of Sight after Corrective Surgery of Adult Spinal Deformity Patients: A 2-Year Follow-up |
| title_sort | change in line of sight after corrective surgery of adult spinal deformity patients a 2 year follow up |
| topic | line of sight adult spinal deformity slope of mcgregor’s line horizontal gaze cranial parameters |
| url | http://www.asianspinejournal.org/upload/pdf/asj-2021-0256.pdf |
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