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- W4235993885 abstract "Background: Alterations in the normal force-displacement (FD) properties of spinal tissues have been associated with specific forms of pathology, such as degenerative disk disease. Unfortunately, few current procedures exist that assess spinal FD properties in an accurate, reliable, and noninvasive manner. Consequently, the clinical relevance of the relation between spinal disorders and spinal FD properties is not fully understood. Objective: To investigate the accuracy and reliability of spinal FD measures obtained through use of a procedure in which real-time ultrasonic imaging (ultrasonic indentation) is used during load-controlled external indentation. Setting: McCaig Centre for Joint Injuries and Arthritis Research, University of Calgary. Methods: The bench-top accuracy and reliability of ultrasonic indentation were assessed by cyclic indentation of a springmounted platform. These data were compared with criterion data derived from a materials testing machine. A porcine preparation was then used to assess the accuracy of ultrasonic indentationgenerated estimates of vertebral displacement in comparison with a criterion of optically tracked displacement. In addition, previously unreported parameters relating to indentation accuracy (frame deflection and off-axis loading) were characterized. Results: Reliability of ultrasonic indentation ranged between 0.99 and 1.00 (intraclass correlation coefficient). Error values in force, displacement, and stiffness ranged from 0.81% to 13.62% over varying experimental conditions. Conclusions: Ultrasonic indentation is a unique procedure that is capable of assessing, noninvasively, FD properties of spinal tissues, including vertebral displacement in the indentation plane. The results of this study suggest that ultrasonic indentation is a potentially useful technique for quantifying spinal FD properties in vivo. (J Manipulative Physiol Ther 2001; 24:149-56)" @default.
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- W4235993885 date "2001-03-01" @default.
- W4235993885 modified "2023-10-18" @default.
- W4235993885 title "Ultrasonic indentation: A procedure for the noninvasive quantification of force-displacement properties of the lumbar spine" @default.
- W4235993885 doi "https://doi.org/10.1067/mmt.2001.113777" @default.
- W4235993885 hasPublicationYear "2001" @default.
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