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Conference Paper: Lumbar segmental motion patterns in patients with degenerative spondylolisthesis were detected with digital videofluoroscopic videos and distortion compensated Roentgen Analysis System

TitleLumbar segmental motion patterns in patients with degenerative spondylolisthesis were detected with digital videofluoroscopic videos and distortion compensated Roentgen Analysis System
Authors
Issue Date2007
PublisherLippincott Williams & Wilkins. The Journal's web site is located at http://abstracts.spinejournal.com
Citation
International Society for the Study of the Lumbar Spine 34th Annual Meeting, Hong Kong, 10-14 June 2007. In Spine-Affiliated Society Meeting Abstracts, 2007, v. 2007, p. 6 How to Cite?
AbstractIntroduction. Assessment of lumbar segmental instability (LSI) in patients with degenerative spondylolisthesis using functional radiographs is controversial. With newly developed image analysis system using enhanced digital videofluoroscopic videos and distortion compensated roentgen analysis, different motion patterns in normal subjects and patients with LSI were noted. Methods. 100 normal subjects and 91 patients with diagnosis of degenerative spondylolisthesis were recruited. Dynamic segmental motion were captured and analyzed in every frame intervals during flexion/extension. The angular displacements of each vertebral level were automatically calculated. The slopes of angular displacement curve were calculated using Linear Regression. Multiple Regression Analysis was conducted to determine the most parsimonious set of independent variables able to predict the distinguish patterns in patients group. Results. A linear-liked motion pattern was found in different genders and age groups in various vertebral levels in normal group. The mean slope of angular displacement of L4/5 was 0.72 0.11. 91 patients were divided into different groups according to their slopes of L4/5 angular displacement curves with reference to the norm. Four major mobility patterns namely, hyper-mobility(n39), normal(n13), hypo-mobility(n27) and total immobility(n12) were detected. Excessive compensatory angular displacements were found in the adjunct levels in patients with hypomobility and total immobility. The standard regression coefficients ( ) showed that age followed by grade of slippage were significant predictors of the mobility patterns. Younger patients with grade I L4/5 degenerative spondylolisthesis predicted hyper-mobility pattern, 0.488, p0.05 whereas elder patients with grade II or above predicted hypomobility pattern, 0.571, p0.05. Discussion. Different lumbar segmental motion patterns could be found in patients with LSI. Corresponding treatments should be specifically given accordingly. Younger patients with grade I L4/5 degenerative spondylolisthesis predicted hyper-mobility pattern whereas elder patients with grade II or above predicted hypo-mobility pattern. These results correlated well with the pathomechanism and the natural history of degenerative spondylolisthesis.
Persistent Identifierhttp://hdl.handle.net/10722/104370
ISSN

 

DC FieldValueLanguage
dc.contributor.authorWong, KWNen_HK
dc.contributor.authorLuk, KDKen_HK
dc.contributor.authorLeong, JCYen_HK
dc.contributor.authorLu, WWen_HK
dc.date.accessioned2010-09-25T21:50:06Z-
dc.date.available2010-09-25T21:50:06Z-
dc.date.issued2007en_HK
dc.identifier.citationInternational Society for the Study of the Lumbar Spine 34th Annual Meeting, Hong Kong, 10-14 June 2007. In Spine-Affiliated Society Meeting Abstracts, 2007, v. 2007, p. 6-
dc.identifier.issn1548-2545-
dc.identifier.urihttp://hdl.handle.net/10722/104370-
dc.description.abstractIntroduction. Assessment of lumbar segmental instability (LSI) in patients with degenerative spondylolisthesis using functional radiographs is controversial. With newly developed image analysis system using enhanced digital videofluoroscopic videos and distortion compensated roentgen analysis, different motion patterns in normal subjects and patients with LSI were noted. Methods. 100 normal subjects and 91 patients with diagnosis of degenerative spondylolisthesis were recruited. Dynamic segmental motion were captured and analyzed in every frame intervals during flexion/extension. The angular displacements of each vertebral level were automatically calculated. The slopes of angular displacement curve were calculated using Linear Regression. Multiple Regression Analysis was conducted to determine the most parsimonious set of independent variables able to predict the distinguish patterns in patients group. Results. A linear-liked motion pattern was found in different genders and age groups in various vertebral levels in normal group. The mean slope of angular displacement of L4/5 was 0.72 0.11. 91 patients were divided into different groups according to their slopes of L4/5 angular displacement curves with reference to the norm. Four major mobility patterns namely, hyper-mobility(n39), normal(n13), hypo-mobility(n27) and total immobility(n12) were detected. Excessive compensatory angular displacements were found in the adjunct levels in patients with hypomobility and total immobility. The standard regression coefficients ( ) showed that age followed by grade of slippage were significant predictors of the mobility patterns. Younger patients with grade I L4/5 degenerative spondylolisthesis predicted hyper-mobility pattern, 0.488, p0.05 whereas elder patients with grade II or above predicted hypomobility pattern, 0.571, p0.05. Discussion. Different lumbar segmental motion patterns could be found in patients with LSI. Corresponding treatments should be specifically given accordingly. Younger patients with grade I L4/5 degenerative spondylolisthesis predicted hyper-mobility pattern whereas elder patients with grade II or above predicted hypo-mobility pattern. These results correlated well with the pathomechanism and the natural history of degenerative spondylolisthesis.-
dc.languageengen_HK
dc.publisherLippincott Williams & Wilkins. The Journal's web site is located at http://abstracts.spinejournal.com-
dc.relation.ispartofSpine-Affiliated Society Meeting Abstractsen_HK
dc.titleLumbar segmental motion patterns in patients with degenerative spondylolisthesis were detected with digital videofluoroscopic videos and distortion compensated Roentgen Analysis Systemen_HK
dc.typeConference_Paperen_HK
dc.identifier.emailLuk, KDK: hrmoldk@hkucc.hku.hken_HK
dc.identifier.emailLeong, JCY: hrmolcy@hkucc.hku.hken_HK
dc.identifier.emailLu, WW: wwlu@hkusua.hku.hken_HK
dc.identifier.authorityLuk, KDK=rp00333en_HK
dc.identifier.authorityLu, WW=rp00411en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1097/01.brs.0000317501.67541.31-
dc.identifier.hkuros136806en_HK
dc.publisher.placeUnited States-

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