Clinical Chiropractic最新文献

{"title":"Accuracy and repeatability of sagittal translation of lumbar vertebrae in vitro and in vivo using quantitative fluoroscopy","authors":"Imke H.M. van Loon,&nbsp;Fiona E. Mellor,&nbsp;Alexander Breen","doi":"10.1016/j.clch.2012.09.001","DOIUrl":"https://doi.org/10.1016/j.clch.2012.09.001","url":null,"abstract":"<div><h3>Objective</h3><p><span>Measuring continuous lumbar spine motion </span><em>in vivo</em> and <em>in vitro</em><span><span> could advance our understanding of instability, for example accurately and reliably measuring translation in the sagittal plane may help in the management of spondylolisthesis. The Anglo-European College of </span>Chiropractic (AECC) has developed a method of measuring </span><em>in vivo</em><span> continuous inter-vertebral motion in the spine using fluoroscopy and image processing – a method called OSMIA (objective spinal motion imaging assessment). This method can measure both inter-vertebral rotation and translation; however it is unknown how accurate and repeatable this method is for translation in the sagittal plane. This study has been performed to determine the accuracy </span><em>in vitro</em> and repeatability <em>in vivo</em> of the measurement of inter-vertebral translation using OSMIA.</p></div><div><h3>Design</h3><p>Prospective <em>in vitro</em> accuracy and retrospective <em>in vivo</em> repeatability study.</p></div><div><h3>Setting</h3><p>Anglo-European College of Chiropractic, United Kingdom.</p></div><div><h3>Subjects</h3><p>Continuous lumbar fluoroscopic sequences <em>in vivo</em> were obtained from 10 patients (mean age 38 years, SD 10.2, 42% male) who had previously undergone OSMIA scans using a passive recumbent protocol which negated the action of muscle and motor control on inter-vertebral motion.</p></div><div><h3>Methods</h3><p>For accuracy, calibration model images of the lumbar spine with zero translation were acquired and others’ imaged with digital fluoroscopy at 15<!--> <!-->Hz during continuous flexion and extension. For inter-examiner repeatability, two observers blinded to each other's results analysed 10 <em>in vivo</em><span> lumbar spine fluoroscopy flexion and extension motion sequences for range of translation using automated tracking algorithms. For intra-examiner repeatability, one observer performed the analysis twice. Accuracy was calculated as the root-mean-square (RMS) difference between the known calibration model characteristics and the results acquired from the fluoroscopic sequences. Repeatability was calculated as agreement by standard errors of measurement (SEM) and 95% limits of agreement and reliability by intra class correlation coefficients (ICC) for each inter-vertebral level (L2-S1) from the </span><em>in vivo</em> motion sequences.</p></div><div><h3>Results</h3><p>The RMS error in measuring translation against the reference standard was under 0.8<!--> <span>mm in respect to a standard lumbar vertebra of 35</span> <!-->mm depth. With the exception of L5-S1 extension, the SEMs from the <em>in vivo</em> agreement studies were below 0.5<!--> <!-->mm for all levels and directions (flexion–extension), and for reliability the ICCs were above 0.84.</p></div><div><h3>Conclusions</h3><p>OSMIA successfully measures inter-vertebral translation <em>in vivo</em> and <em>in ","PeriodicalId":100267,"journal":{"name":"Clinical Chiropractic","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.clch.2012.09.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91760529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}