Stato-dynamical spine analysis and trunk posture – comparing ultrasound based vs. Optical based measurement system

Thorwesten L, Schnieders D, Schilgen M, Völker K

Abstract in digital collection (conference)


Introduction: Posture relevant parameters can be measured by numerous measuring systems using different technologies but there is a lack of comparison of different technologies in the literature. The aim of the study was to evaluate different methods (ultrasound based versus optical based) in stato-dynamical spine analysis and posture (zebris® CMS HS versus Formetric®) regarding accuracy and elaborate benefits as well as disadvantages in application. Methods: 32 patients (17 male; 15 female) within the age of 27,7(± 6,2) years participated in this cross section study. Anamnesis questionnaire regarding sport injury and pain was interrogated. Patients were measured thrice with both systems. Statistic evaluation was done according to Bland/Altman (1986) as well as Spearmans correlation calculation using SPSSv11.5 and Excel 2003 Results: Comparing measured values a wide congruence could be demonstrated with marginal underestimating in kyphosis and lordosis data for the ultrasound based system. The largest deviation could be shown for pelvic obliquity measured in mm. Trunk inclination, vertical deflection an pelvic obliquity measured in degree showed proper analogy for both measuring systems. Validity, reliability based on particular technical principles could be verified. Discussion: In summary both systems revealed usable quality in specific applications. The manual performance in using the ultrasound based system bears the risk of cumulated errors during measurement. Working with the ultrasound based system pelvic oblique is an accident-sensitive parameter. Versatile applications such as static or dynamic measurements could be done with the ultrasound based system. Differences in axial balance in the range of physiologic motion can be calculated under dynamic conditions, and compared to normative data. The contact free and quick done rasterstereography allows with the help of surface back analysis to supplement radiological and clinical examinations of the spine in orthopeadic and biomechanic questions.

Details zur Publikation

Release year: 2008
Language in which the publication is writtenEnglish
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