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- Title
Impact of Supine versus Prone Positioning on Segmental Lumbar Lordosis in Patients Undergoing ALIF Followed by PSF: A Comparative Study.
- Authors
Sadeghzadeh, Sina; Yoo, Kelly H.; Lopez, Ivan; Johnstone, Thomas; Schonfeld, Ethan; Haider, Ghani; Marianayagam, Neelan J.; Stienen, Martin N.; Veeravagu, Anand
- Abstract
Background: Anterior lumbar interbody fusion (ALIF) and posterior spinal fusion (PSF) play pivotal roles in restoring lumbar lordosis in spinal surgery. There is an ongoing debate between combined single-position surgery and traditional prone-position PSF for optimizing segmental lumbar lordosis. Methods: This retrospective study analyzed 59 patients who underwent ALIF in the supine position followed by PSF in the prone position at a single institution. Cobb angles were measured preoperatively, post-ALIF, and post-PSF using X-ray imaging. One-way repeated measures ANOVA and post-hoc analyses with Bonferroni adjustment were employed to compare mean Cobb angles at different time points. Cohen's d effect sizes were calculated to assess the magnitude of changes. Sample size calculations were performed to ensure statistical power. Results: The mean segmental Cobb angle significantly increased from preoperative (32.2 ± 13.8 degrees) to post-ALIF (42.2 ± 14.3 degrees, Cohen's d: −0.71, p < 0.0001) and post-PSF (43.6 ± 14.6 degrees, Cohen's d: −0.80, p < 0.0001). There was no significant difference between Cobb angles after ALIF and after PSF (Cohen's d: −0.10, p = 0.14). The findings remained consistent when Cobb angles were analyzed separately for single-screw and double-screw ALIF constructs. Conclusions: Both supine ALIF and prone PSF significantly increased segmental lumbar lordosis compared to preoperative measurements. The negligible difference between post-ALIF and post-PSF lordosis suggests that supine ALIF followed by prone PSF can be an effective approach, providing flexibility in surgical positioning without compromising lordosis improvement.
- Subjects
LORDOSIS; SPINAL fusion; SUPINE position; X-ray imaging; SPINAL surgery; STATISTICAL power analysis; PATIENT positioning
- Publication
Journal of Clinical Medicine, 2024, Vol 13, Issue 12, p3555
- ISSN
2077-0383
- Publication type
Article
- DOI
10.3390/jcm13123555