Evaluation of Agreement Between Static Posturography Methods Employing Tensometers and Inertial Sensors

Kotas, Rafał; Janc, Magdalena; Kamiński, Marek; Marciniak, Pawel; Zamysłowska-Szmytke, Ewa; Tylman, Wojciech

doi:10.1109/access.2019.2952496

Cited by 12 publications

(13 citation statements)

References 26 publications

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“…The operation of this algorithm is based on the use of quaternions for the representation of orientation in 3D space. A detailed description of the calculation of the parameters was presented in the previous study 15 .…”

Section: Methodsmentioning

confidence: 99%

A comparison of head movements tests in force plate and accelerometer based posturography in patients with balance problems due to vestibular dysfunction

Janc

Śliwińska-Kowalska

Józefowicz-Korczyńska

et al. 2021

Sci Rep

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This study compares HS posturography on inertial sensors (MediPost) with force platform posturography in patients with unilateral vestibular dysfunction. The study group included 38 patients (age 50.6; SD 11.6) with unilateral vestibular weakness (UV) and 65 healthy volunteers (48.7; SD 11.5). HS tests were performed simultaneously on the force plate and with MediPost sensor attached at L4. Four conditions applied: eyes open/closed, firm/foam. The tests were performed twice, with the head moving at the frequency of 0.3 Hz (HS 0.3) and 0.6 Hz (HS 0.6). Mean sway velocity was significantly lower for MediPost than force plate in 4th condition both in UV and healthy group. For HS 0.3 the differences between devices were marginal; the highest sensitivity (87%) and specificity (95%) were in 4th condition. For HS 0.6 MediPost revealed lower sensitivity than force plate although the surface parameter improved results. MediPost IMU device and force platform posturography revealed a similar ability to differentiate between patients with balance problems in course of vestibular pathology and healthy participants, despite the differences observed between measuring methods. In some tests surface parameter may be more appropriate than sway velocity in improving MediPost sensitivity.

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Section: Methodsmentioning

confidence: 99%

A comparison of head movements tests in force plate and accelerometer based posturography in patients with balance problems due to vestibular dysfunction

Janc

Śliwińska-Kowalska

Józefowicz-Korczyńska

et al. 2021

Sci Rep

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“…This study is a further expansion of the study conducted by our research group in 2019 [ 22 ] In our previous study, we established that MediPost can be an alternative to classical static posturography in terms of measurement reliability. This was achieved by analyzing compliance results of trajectories in specific tasks by means of intraclass correlation coefficients (ICC) and Bland–Altman plots.…”

Section: Introductionmentioning

confidence: 98%

Utility of the Novel MediPost Mobile Posturography Device in the Assessment of Patients with a Unilateral Vestibular Disorder

Rosiak

Gawrońska

Janc

et al. 2022

Sensors

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Balance disorders are a growing problem worldwide. Thus, there is an increasing need to provide an inexpensive and feasible alternative to standard posturographic platforms (SP) used for the assessment of balance and to provide a possible solution for telemonitoring of patients. A novel mobile posturography (MP) MediPost device was developed to address these issues. This prospective study used a Modified Clinical Test of Sensory Interaction on Balance to evaluate healthy individuals and patients with a unilateral vestibular disorder through SP and MP simultaneously. The control group included 65 healthy volunteers, while the study group included 38 patients diagnosed with a unilateral vestibular deficit. The angular velocity values obtained from both methods were compared by intraclass correlation coefficients (ICC) and Bland–Altman plot analysis. Diagnostic capabilities were measured in terms of sensitivity and specificity. The ICC between the two methods for conditions 2–4 was indicative of excellent reliability, with the ICC > 0.9 (p < 0.001), except for Condition 1 (standing stance, eyes open) ICC = 0.685, p < 0.001, which is indicative of moderate reliability. ROC curve analysis of angular velocity for condition 4 represents the most accurate differentiating factor with AUC values of 0.939 for SP and 0.953 for MP. This condition also reported the highest sensitivity, specificity, PPV, and NPV values with 86.4%, 87.7%, 80%, and 90.5% for SP, and 92.1%, 84.6%, 77.8%, and 94.8% for MP, respectively. The newly developed MediPost device has high sensitivity and specificity in distinguishing between healthy individuals and patients with a unilateral vestibular deficit.

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“…The device is patent pending. Hardware considerations are not elaborated in this paper as they have little impact on the data processing paths; the reader is referred to the previous paper by the same authors [ 27 ]. Data storage and processing is provided by custom software running on a standard PC.…”

Section: Overview Of the Solutionmentioning

confidence: 99%

Fully Automatic Fall Risk Assessment Based on a Fast Mobility Test

Tylman

Kotas

Kamiński

et al. 2021

Sensors

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This paper presents a fall risk assessment approach based on a fast mobility test, automatically evaluated using a low-cost, scalable system for the recording and analysis of body movement. This mobility test has never before been investigated as a sole source of data for fall risk assessment. It can be performed in a very limited space and needs only minimal additional equipment, yet provides large amounts of information, as the presented system can obtain much more data than traditional observation by capturing minute details regarding body movement. The readings are provided wirelessly by one to seven low-cost micro-electro-mechanical inertial measurement units attached to the subject’s body segments. Combined with a body model, these allow segment rotations and translations to be computed and for body movements to be recreated in software. The subject can then be automatically classified by an artificial neural network based on selected values in the test, and those with an elevated risk of falls can be identified. Results obtained from a group of 40 subjects of various ages, both healthy volunteers and patients with vestibular system impairment, are presented to demonstrate the combined capabilities of the test and system. Labelling of subjects as fallers and non-fallers was performed using an objective and precise sensory organization test; it is an important novelty as this approach to subject labelling has never before been used in the design and evaluation of fall risk assessment systems. The findings show a true-positive ratio of 85% and true-negative ratio of 63% for classifying subjects as fallers or non-fallers using the introduced fast mobility test, which are noticeably better than those obtained for the long-established Timed Up and Go test.

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Evaluation of Agreement Between Static Posturography Methods Employing Tensometers and Inertial Sensors

Cited by 12 publications

References 26 publications

A comparison of head movements tests in force plate and accelerometer based posturography in patients with balance problems due to vestibular dysfunction

A comparison of head movements tests in force plate and accelerometer based posturography in patients with balance problems due to vestibular dysfunction

Utility of the Novel MediPost Mobile Posturography Device in the Assessment of Patients with a Unilateral Vestibular Disorder

Fully Automatic Fall Risk Assessment Based on a Fast Mobility Test

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