Global tilt: a single parameter incorporating spinal and pelvic sagittal parameters and least affected by patient positioning

Purpose Regarding the close interaction between the spinal alignment and the pelvis orientation, no parameter is routinely used to describe and to evaluate the global spinopelvic balance, taking into account simultaneously the spinal part and the pelvic part of the global alignment. We described the...

Full description

Saved in:
Bibliographic Details
Published in:European spine journal 2016-11, Vol.25 (11), p.3644-3649
Main Authors: Obeid, I., Boissière, L., Yilgor, C., Larrieu, D., Pellisé, F., Alanay, A., Acaroglu, E., Perez-Grueso, F. J., Kleinstück, F., Vital, J. M., Bourghli, A.
Format: Article
Language:English
Subjects:
Adult
Aged
Bone Malalignment - diagnostic imaging
Bone Malalignment - pathology
Cohort Studies
Databases, Factual
Female
Humans
Male
Medicine
Medicine & Public Health
Middle Aged
Neurosurgery
Original Article
Patient Positioning
Pelvic Bones - diagnostic imaging
Pelvic Bones - pathology
Radiography
Spine - diagnostic imaging
Spine - pathology
Surgical Orthopedics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Purpose Regarding the close interaction between the spinal alignment and the pelvis orientation, no parameter is routinely used to describe and to evaluate the global spinopelvic balance, taking into account simultaneously the spinal part and the pelvic part of the global alignment. We described the global tilt (GT) that could analyze malalignment considering the spine and the pelvis simultaneously. From a geometrical point of view, the global tilt is the sum of the pelvic tilt (PT) and the C7 vertical tilt (angular value of sagittal vertical axis). The aim of this study is to evaluate the global tilt with comparison to PT and sagittal vertical axis (SVA), with the hypothesis that GT would be the least sensitive to positional changes. Methods A cohort of 22 patients with sagittal malalignment was identified from a multicentric database of adult spinal deformities (ASD). Inclusion criteria were age >30 years, SVA > 40 mm and/or PT > 20°. All patients had full spine EOS radiographs in positions 1 and 2 (P1 and P2), in which the patient was asked to stand and put his hands on his shoulders without any effort (P1), or to make an effort to be as straight as possible (P2). PT, SVA and GT were measured in both positions and changes between P1 and P2 were calculated and compared using Student’s t test with significance level at p  
ISSN:0940-6719
1432-0932
DOI:10.1007/s00586-016-4649-3