How to screen for lumbar spine stiffness in patients awaiting total hip arthroplasty

Innmann, Moritz; Verhaegen, Jeroen; Renkawitz, Tobias; Merle, Christian; Grammatopoulos, George

doi:10.1016/J.ARTH.2023.08.006

Title

How to screen for lumbar spine stiffness in patients awaiting total hip arthroplasty

Author

Innmann, Moritz

Verhaegen, Jeroen

Renkawitz, Tobias

Merle, Christian

Grammatopoulos, George

Abstract

Background This study aimed to (1) define the prevalence of spinopelvic abnormalities among patients who have hip osteoarthritis (OA) and controls (asymptomatic volunteers) and (2) identify factors that reliably predict the presence of lumbar spine stiffness. Methods This is a prospective, cross-sectional, case-cohort study of patients who have end-stage primary hip OA, who underwent primary total hip arthroplasty (THA). Patients were compared with a cohort of asymptomatic volunteers, matched for age, sex, and body mass index (BMI), serving as a control group. Spinopelvic pathologies were defined as: lumbar spine flatback deformity (difference of 10 or more degrees for pelvic incidence minus lumbar lordosis angle), a standing sagittal pelvic tilt of 19° or more and lumbar spine stiffness (lumbar flexion of less than 20° between both postures). Results The prevalence of spinopelvic pathologies was similar between patients and controls (flatback deformity: 16% versus 10%, P = .209; standing pelvic tilt >19°: 17% versus 24%, P = .218; lumbar spine stiffness: 6% versus 5%, P = .827). Age over 65 years-old and standing lumbar lordosis angle less than 45° were associated with high sensitivity and specificity for identifying lumbar spine stiffness (age >65 years: 82% and 66%; standing lumbar lordosis angle <45°: 85% and 73%). Conclusion The presence of end-stage hip osteoarthritis was not associated with increased prevalence of adverse spinopelvic characteristics compared to matched, asymptomatic volunteers. Age and LLstanding are the strongest predictors of lumbar spine flexion and can guide clinical practice on when to obtain additional radiographs for patients who have hip OA before arthroplasty to identify at-risk patients.

Language

English

Source (journal)

Journal of arthroplasty. - New York, N.Y.

Publication

New York, N.Y. : 2024

ISSN

0883-5403

DOI

10.1016/J.ARTH.2023.08.006

Volume/pages

39 :1 (2024) , p. 124-131