How Does Gravity Influence the Distribution of Lordosis in Patients With Sagittal Malalignment?
Journal
Global spine journal
ISSN: 2192-5682
Titre abrégé: Global Spine J
Pays: England
ID NLM: 101596156
Informations de publication
Date de publication:
Oct 2023
Oct 2023
Historique:
medline:
31
3
2022
pubmed:
31
3
2022
entrez:
30
3
2022
Statut:
ppublish
Résumé
Retrospective cohort study. Compare the supine vs standing radiographs of patients with adult spinal deformity against ideals defined by healthy standing alignment. 56 patients with primary sagittal ASD (SRS-Schwab Type N) and 119 asymptomatic volunteers were included. Standing alignment of asymptomatic volunteers was used to calculate PI-based formulas for normative age-adjusted standing PI-LL, L4-S1, and L1-L4. These formulas were applied to the supine and standing alignment of ASD cohort. Analyses were repeated on a cohort of 25 patients with at least 5 degrees of lumbar flexibility (difference between supine and standing lordosis). The asymptomatic cohort yielded the following PI-based formulas: PI-LL = -38.3 + .41*PI + .21*Age, L4-S1 = 45.3-.18*Age, L1-L4 = -3 + .48*PI). PI-LL improved with supine positioning (mean 8.9 ± 18.7°, When the effects of gravity are removed, the distal portion of the lumbar spine (i.e., below the apex of lordosis) corrects, suggesting that structural lumbar deformity is primarily proximal.
Identifiants
pubmed: 35352585
doi: 10.1177/21925682221087467
pmc: PMC10538318
doi:
Types de publication
Journal Article
Langues
eng
Pagination
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