The Accuracy of Ultrasonic Indentation in Detecting Simulated Bone Displacement: A Comparison of Three Techniques

Kawchuk, Gregory N.; Liddle, Tasha; Fauvel, O. R.; Johnston, Clifton R.

doi:10.1016/j.jmpt.2005.11.015

Cited by 17 publications

(11 citation statements)

References 43 publications

(35 reference statements)

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“…PA stiffness is calculated from force and displacement data and is a measure used commonly by other investigators. 37,38,40,46 -49 In our laboratory, this measure has been shown to have excellent validity 25,27 and reliability. 25a Other methods are also used to compute stiffness and/or stability and include vibration, 7 computational modeling 21,34,50,51 and in vitro approaches.…”

Section: Limitations and Assumptionsmentioning

confidence: 99%

“…25 In brief, an indentation device is used to apply an increasing PA indentation load to the external structures of the spine. A load cell and displacement transducer incorporated into the indenter allow measurement of the bulk tissue response to a given load ( Figure 2).…”

Section: Pa Spinal Stiffness Assessmentmentioning

confidence: 99%

“…A load cell and displacement transducer incorporated into the indenter allow measurement of the bulk tissue response to a given load ( Figure 2). From these data, stiffness values can be calculated, which has been shown to have excellent accuracy 25 and reliability. 25a Indentation testing was performed by a single operator (T.S.)…”

Section: Pa Spinal Stiffness Assessmentmentioning

confidence: 99%

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The Effect of Abdominal Stabilization Contractions on Posteroanterior Spinal Stiffness

Stanton¹,

Kawchuk²

2008

Spine

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In asymptomatic subjects, the abdominal brace contraction provided an immediate PA stiffening effect that was significantly greater in magnitude when compared with conditions of rest and abdominal hollowing. These findings may allow clinicians to better match commonly prescribed contraction-based interventions with specific patient needs. Future work is required to assess the long-term effect of repeated abdominal brace and hollow contractions on PA spinal stiffness and low back pain.

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Section: Limitations and Assumptionsmentioning

confidence: 99%

Section: Pa Spinal Stiffness Assessmentmentioning

confidence: 99%

Section: Pa Spinal Stiffness Assessmentmentioning

confidence: 99%

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The Effect of Abdominal Stabilization Contractions on Posteroanterior Spinal Stiffness

Stanton¹,

Kawchuk²

2008

Spine

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“…The authors state that the deformation of the spring was calibrated using a dial indicator, but neither the methodology nor the dial indicator is described or shown in the diagram representing the device. In a more recent study, Kawchuk et al (2006) describe using an ultrasonic system, tested on a tissue simulator, and report superior measurements of displacement.…”

Section: Introductionmentioning

confidence: 99%

Device, protocol and measurement of regional spinal stiffness

Kumar

Stoll²

2011

Journal of Electromyography and Kinesiology

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“…After the index test, spinal stiffness was quantified by an examiner blinded to the results of the manual stiffness assessment using a mechanized indentation device with established reliability (Stanton and Kawchuk, 2009;Wong et al, 2013) and accuracy (Kawchuk et al, 2006). The indentation device consisted of a saddle tip attached to the terminal end of a linear stepping motor (Dual Motion Motor, HSI, Waterbury, CT) supported vertically by a rigid metal frame (Fig.…”

Section: Criterion Standardmentioning

confidence: 99%

A review of space robotics technologies for on-orbit servicing

Flores-Abad

Pham

et al. 2014

Progress in Aerospace Sciences

1,044

353

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a b s t r a c tAssessment of spinal stiffness is widely used by manual therapy practitioners as a part of clinical diagnosis and treatment selection. Although studies have commonly found poor reliability of such procedures, conflicting evidence suggests that assessment of spinal stiffness may help predict response to specific treatments. The current study evaluated the criterion validity of manual assessments of spinal stiffness by comparing them to indentation measurements in patients with low back pain (LBP). As part of a standard examination, an experienced clinician assessed passive accessory spinal stiffness of the L3 vertebrae using posterior to anterior (PA) force on the spinous process of L3 in 50 subjects (54% female, mean (SD) age ¼ 33.0 (12.8) years, BMI ¼ 27.0 (6.0) kg/m 2 ) with LBP. A criterion measure of spinal stiffness was performed using mechanized indentation by a blinded second examiner. Results indicated that manual assessments were uncorrelated to criterion measures of stiffness (spearman rho ¼ 0.06, p ¼ 0.67). Similarly, sensitivity and specificity estimates of judgments of hypomobility were low (0.20 e0.45) and likelihood ratios were generally not statistically significant. Sensitivity and specificity of judgments of hypermobility were not calculated due to limited prevalence. Additional analysis found that BMI explained 32% of the variance in the criterion measure of stiffness, yet failed to improve the relationship between assessments. Additional studies should investigate whether manual assessment of stiffness relates to other clinical and biomechanical constructs, such as symptom reproduction, angular rotation, quality of motion, or end feel.Published by Elsevier Ltd.

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The Accuracy of Ultrasonic Indentation in Detecting Simulated Bone Displacement: A Comparison of Three Techniques

Cited by 17 publications

References 43 publications

The Effect of Abdominal Stabilization Contractions on Posteroanterior Spinal Stiffness

The Effect of Abdominal Stabilization Contractions on Posteroanterior Spinal Stiffness

Device, protocol and measurement of regional spinal stiffness

A review of space robotics technologies for on-orbit servicing

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