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41. Estimation of spatio-temporal parameters of gait from magneto-inertial measurement units: multicenter validation among Parkinson, mildly cognitively impaired and healthy older adults (PubMed)

Estimation of spatio-temporal parameters of gait from magneto-inertial measurement units: multicenter validation among Parkinson, mildly cognitively impaired and healthy older adults The use of miniaturized magneto-inertial measurement units (MIMUs) allows for an objective evaluation of gait and a quantitative assessment of clinical outcomes. Spatial and temporal parameters are generally recognized as key metrics for characterizing gait. Although several methods for their estimate have been

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2018 Biomedical engineering online

42. Quantitative Analysis of Parkinsonian Tremor in a Clinical Setting Using Inertial Measurement Units (PubMed)

Quantitative Analysis of Parkinsonian Tremor in a Clinical Setting Using Inertial Measurement Units Parkinson's disease (PD) is a neurodegenerative disorder that affects human voluntary movements. Tremor is one of the most common symptoms of PD and is expressed as involuntary oscillation of the body. Tremors can be analysed in the frequency domain.The aim of the current study was to examine selected tremor parameters (frequency, root mean square, and approximated entropy) in order to quantify (...) measurement unit was used for the measurement of upper limb motor tasks. For the quantitative estimation of kinetic and postural tremors, dominant frequency, root means square, and approximation entropy were selected and calculated from the measured angular velocity and linear acceleration signals. A one-way ANOVA with a significance level of α = 0.05 was used to test the null hypothesis that the means of the tremor metrics were the same between the PD and CO groups.Statistically significant differences

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2018 Parkinson's disease

43. Estimation of Energy Expenditure in Wheelchair-Bound Spinal Cord Injured Individuals Using Inertial Measurement Units (PubMed)

Estimation of Energy Expenditure in Wheelchair-Bound Spinal Cord Injured Individuals Using Inertial Measurement Units A healthy lifestyle reduces the risk of cardio-vascular disease. As wheelchair-bound individuals with spinal cord injury (SCI) are challenged in their activities, promoting and coaching an active lifestyle is especially relevant. Although there are many commercial activity trackers available for the able-bodied population, including those providing feedback about energy (...) expenditure (EE), activity trackers for the SCI population are largely lacking, or are limited to a small set of activities performed in controlled settings. The aims of the present study were to develop and validate an algorithm based on inertial measurement unit (IMU) data to continuously monitor EE in wheelchair-bound individuals with a SCI, and to establish reference activity values for a healthy lifestyle in this population. For this purpose, EE was measured in 30 subjects each wearing four IMUs

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2018 Frontiers in neurology

44. Quality Measurement Recommendations Relevant to Clinical Guidelines in Germany and the United Kingdom: (What) Can We Learn From Each Other? (PubMed)

Quality Measurement Recommendations Relevant to Clinical Guidelines in Germany and the United Kingdom: (What) Can We Learn From Each Other? We conducted a systematic review of clinical guidelines (CGs) to examine the methodological approaches of quality indicator derivation in CGs, the frequency of quality indicators to check CG recommendations in routine care, and clinimetric properties of quality indicators. We analyzed the publicly available CG databases of the Association of the Scientific (...) Medical Societies in Germany (AWMF) and National Institute for Health and Care Excellence (NICE). Data on the methodology of subsequent quality indicator derivation, the content and definition of recommended quality indicators, and clinimetric properties of measurement instruments were extracted. In Germany, no explicit methodological guidance exists, but 3 different approaches are used. For NICE, a general approach is used for the derivation of quality indicators out of quality standards. Quality

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2018 Inquiry: A Journal of Medical Care Organization, Provision and Financing

45. Using Inertial Measurement Units and Electromyography to Quantify Movement during Action Research Arm Test Execution (PubMed)

Using Inertial Measurement Units and Electromyography to Quantify Movement during Action Research Arm Test Execution In patients after stroke, ability of the upper limb is commonly assessed with standardised clinical tests that provide a complete upper limb assessment. This paper presents quantification of upper limb movement during the execution of Action research arm test (ARAT) using a wearable system of inertial measurement units (IMU) for kinematic quantification and electromyography (EMG

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2018 Sensors (Basel, Switzerland)

46. Measuring Progress in Reducing Disparities in HIV, Tuberculosis, Viral Hepatitis, and Sexually Transmitted Diseases in the United States: A Summary of This Theme Issue (PubMed)

Measuring Progress in Reducing Disparities in HIV, Tuberculosis, Viral Hepatitis, and Sexually Transmitted Diseases in the United States: A Summary of This Theme Issue 30383428 2018 11 14 1541-0048 108 S4 2018 Nov American journal of public health Am J Public Health Measuring Progress in Reducing Disparities in HIV, Tuberculosis, Viral Hepatitis, and Sexually Transmitted Diseases in the United States: A Summary of This Theme Issue. S240-S241 10.2105/AJPH.2018.304761 Truman Benedict I BI All (...) All of the authors are with the Office of the Director, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, GA. They are also guest editors for this supplement issue. eng Journal Article United States Am J Public Health 1254074 0090-0036 2018 11 2 6 0 2018 11 2 6 0 2018 11 2 6 0 ppublish 30383428 10.2105/AJPH.2018.304761 PMC6215381 Int J Epidemiol. 2001 Aug;30(4):899-900 11511625 Sex Transm Dis. 2008 Dec;35(12 Suppl):S40-4

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2018 American Journal of Public Health

47. A Separated Calibration Method for Inertial Measurement Units Mounted on Three-Axis Turntables (PubMed)

A Separated Calibration Method for Inertial Measurement Units Mounted on Three-Axis Turntables Inertial Measurement Unit (IMU) calibration accuracy is easily affected by turntable errors, so the primary aim of this study is to reduce the dependence on the turntable's precision during the calibration process. Firstly, the indicated-output of the IMU considering turntable errors is constructed and with the introduction of turntable errors, the functional relationship between turntable errors

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2018 Sensors (Basel, Switzerland)

48. Highly Accurate Step Counting at Various Walking States Using Low-Cost Inertial Measurement Unit Support Indoor Positioning System (PubMed)

Highly Accurate Step Counting at Various Walking States Using Low-Cost Inertial Measurement Unit Support Indoor Positioning System Accurate step counting is essential for indoor positioning, health monitoring systems, and other indoor positioning services. There are several publications and commercial applications in step counting. Nevertheless, over-counting, under-counting, and false walking problems are still encountered in these methods. In this paper, we propose to develop a highly

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2018 Sensors (Basel, Switzerland)

49. Standard-unit measurement of cellular viability using dynamic light scattering optical coherence microscopy (PubMed)

Standard-unit measurement of cellular viability using dynamic light scattering optical coherence microscopy Dynamic light scattering optical coherence microscopy (DLS-OCM) integrates DLS, which measures diffusion or flow of particles by analyzing fluctuations in light scattered by the particles, and OCM, which achieves single-cell resolution by combining coherence and confocal gating, integratively enabling cellular-resolution 3D mapping of the diffusion coefficient, and flow velocity (...) . The diffusion coefficient mapping has a potential for the non-destructive measurement of cellular viability in the standard unit but has not been validated yet. Here, we present DLS-OCM imaging of intra-cellular motility (ICM) as a surrogate of cellular viability. For this purpose, we have simultaneously obtained and compared ICM-contrast DLS-OCM images and calcium fluorescence-contrast images of retinal ganglion cells, and then characterized the responses of the measured ICM to a change in cellular

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2018 Biomedical optics express

50. A Robust and Adaptive Complementary Kalman Filter Based on Mahalanobis Distance for Ultra Wideband/Inertial Measurement Unit Fusion Positioning (PubMed)

A Robust and Adaptive Complementary Kalman Filter Based on Mahalanobis Distance for Ultra Wideband/Inertial Measurement Unit Fusion Positioning Ultra wideband (UWB) has been a popular technology for indoor positioning due to its high accuracy. However, in many indoor application scenarios UWB measurements are influenced by outliers under non-line of sight (NLOS) conditions. To detect and eliminate outlying UWB observations, we propose a UWB/Inertial Measurement Unit (UWB/IMU) fusion filter

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2018 Sensors (Basel, Switzerland)

51. Measuring labor and delivery unit culture and clinicians' attitudes toward birth: Revision and validation of the Labor Culture Survey. (PubMed)

Measuring labor and delivery unit culture and clinicians' attitudes toward birth: Revision and validation of the Labor Culture Survey. Cesarean delivery rates in the United States vary widely between hospitals, which cannot be fully explained by hospital or patient factors. Cultural factors are hypothesized to play a role in cesarean overuse, yet tools to measure labor culture are lacking. The aim of this study was to revise and validate a survey tool to measure hospital culture specific (...) and reliable tool to measure constructs shown to be associated with cesarean rates. These findings support prior research that has shown that hospital culture is measurable, and that clinician attitudes are predictive of clinician behaviors. Unique to our survey is the construct of labor and delivery unit microculture.© 2018 Wiley Periodicals, Inc.

2018 Birth

52. Measurement Techniques and Utility of Hounsfield Unit Values for Assessment of Bone Quality Prior to Spinal Instrumentation: A Review of Current Literature. (PubMed)

Measurement Techniques and Utility of Hounsfield Unit Values for Assessment of Bone Quality Prior to Spinal Instrumentation: A Review of Current Literature. A systematic review.The aim of this study was to evaluate the clinical utility of assessing bone quality using computed tomography (CT) attenuation in Hounsfield units (HU).Assessing bone quality before spine instrumentation is an essential step of preoperative planning. Dual energy x-ray absorptiometry (DEXA) has been the gold standard (...) for assessing bone mineral density (BMD); however, DEXA can result in spuriously elevated BMD measurements in patients with degenerative disease, compression fractures, and/or vascular calcifications. Measuring vertebral HU values has been proposed as an alternate method of assessing BMD and bone quality.We searched MEDLINE, Cochrane Library, and EMBASE for studies correlating HU to BMD and to spine surgery outcomes.HU measurements correlate with success of lumbar interbody fusion (133.7 vs. 107.3 HU

2018 Spine

53. Operationalization of the Transition to Comfort Measures Only in the Neurocritical Care Unit: A Quality Improvement Project. (PubMed)

Operationalization of the Transition to Comfort Measures Only in the Neurocritical Care Unit: A Quality Improvement Project. Transition to comfort measures only (CMO) is common in the neurocritical care unit, and close communication between interdisciplinary health-care teams is vital to a smooth transition. We developed and implemented a CMO huddle in an effort to reduce inconsistencies during the process of CMO transition.The CMO huddle was a multiphase quality improvement project (...) in a neurocritical care unit of a level-1 trauma and comprehensive stroke center. Interdisciplinary critical care clinicians engaged in a huddle during CMO processes and participated in a pre- and postimplementation survey to examine the impact of CMO huddle on communication, missed opportunities, and improvement in knowledge.Since the CMO implementation, a total of 131 patients underwent CMO transitions. After implementation of an interdisciplinary CMO huddle, 64.3% of neurocritical care nurses reported

2018 American Journal of Hospice and Palliative Medicine

54. Inter-scanner variability in Hounsfield unit measured by computed tomography of the brain and effect on gray-to-white matter ratio. (PubMed)

Inter-scanner variability in Hounsfield unit measured by computed tomography of the brain and effect on gray-to-white matter ratio. The density ratio of gray matter (GM) to white matter (WM) on brain computed tomography (CT) (gray-to-white matter ratio, GWR) helps predict the prognosis of comatose patients after cardiac arrest. However, Hounsfield units (HU) are not an absolute value and can change based on imaging parameters and CT scanners. We compared the density of brain GM and WM (...) and the GWR by using images scanned with different types of CT machines.102 patients with normal readings who were scanned using three types of CT scanners were included in the study. HU were measured at the basal ganglia level by two observers with circular regions of interest.The difference in GM was 0.98-10.30 HU and WM was 1.05-7.55 HU. The mean value of measured HU and GWR were different for each CT group. The ANOVA test showed significant difference all variables. The post hoc test for GWR, which

2018 American Journal of Emergency Medicine

55. A Foot-Mounted Inertial Measurement Unit (IMU) Positioning Algorithm Based on Magnetic Constraint (PubMed)

A Foot-Mounted Inertial Measurement Unit (IMU) Positioning Algorithm Based on Magnetic Constraint With the development of related applications, indoor positioning techniques have been more and more widely developed. Based on Wi-Fi, Bluetooth low energy (BLE) and geomagnetism, indoor positioning techniques often rely on the physical location of fingerprint information. The focus and difficulty of establishing the fingerprint database are in obtaining a relatively accurate physical location (...) with as little given information as possible. This paper presents a foot-mounted inertial measurement unit (IMU) positioning algorithm under the loop closure constraint based on magnetic information. It can provide relatively reliable position information without maps and geomagnetic information and provides a relatively accurate coordinate for the collection of a fingerprint database. In the experiment, the features extracted by the multi-level Fourier transform method proposed in this paper are validated

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2018 Sensors (Basel, Switzerland)

56. Inertial Measurement Units for Clinical Movement Analysis: Reliability and Concurrent Validity (PubMed)

Inertial Measurement Units for Clinical Movement Analysis: Reliability and Concurrent Validity The aim of this study was to investigate the reliability and concurrent validity of a commercially available Xsens MVN BIOMECH inertial-sensor-based motion capture system during clinically relevant functional activities. A clinician with no prior experience of motion capture technologies and an experienced clinical movement scientist each assessed 26 healthy participants within each of two sessions (...) using a camera-based motion capture system and the MVN BIOMECH system. Participants performed overground walking, squatting, and jumping. Sessions were separated by 4 ± 3 days. Reliability was evaluated using intraclass correlation coefficient and standard error of measurement, and validity was evaluated using the coefficient of multiple correlation and the linear fit method. Day-to-day reliability was generally fair-to-excellent in all three planes for hip, knee, and ankle joint angles in all three

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2018 Sensors (Basel, Switzerland)

57. Player Monitoring in Indoor Team Sports: Concurrent Validity of Inertial Measurement Units to Quantify Average and Peak Acceleration Values (PubMed)

Player Monitoring in Indoor Team Sports: Concurrent Validity of Inertial Measurement Units to Quantify Average and Peak Acceleration Values The increasing interest in assessing physical demands in team sports has led to the development of multiple sports related monitoring systems. Due to technical limitations, these systems primarily could be applied to outdoor sports, whereas an equivalent indoor locomotion analysis is not established yet. Technological development of inertial measurement (...) units (IMU) broadens the possibilities for player monitoring and enables the quantification of locomotor movements in indoor environments. The aim of the current study was to validate an IMU measuring by determining average and peak human acceleration under indoor conditions in team sport specific movements. Data of a single wearable tracking device including an IMU (Optimeye S5, Catapult Sports, Melbourne, Australia) were compared to the results of a 3D motion analysis (MA) system (Vicon Motion

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2018 Frontiers in physiology

58. Research into Kinect/Inertial Measurement Units Based on Indoor Robots (PubMed)

Research into Kinect/Inertial Measurement Units Based on Indoor Robots As indoor mobile navigation suffers from low positioning accuracy and accumulation error, we carried out research into an integrated location system for a robot based on Kinect and an Inertial Measurement Unit (IMU). In this paper, the close-range stereo images are used to calculate the attitude information and the translation amount of the adjacent positions of the robot by means of the absolute orientation algorithm (...) , for improving the calculation accuracy of the robot's movement. Relying on the Kinect visual measurement and the strap-down IMU devices, we also use Kalman filtering to obtain the errors of the position and attitude outputs, in order to seek the optimal estimation and correct the errors. Experimental results show that the proposed method is able to improve the positioning accuracy and stability of the indoor mobile robot.

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2018 Sensors (Basel, Switzerland)

59. Are patient self-reported outcome measures (PROMs) sensitive enough to be used as endpoints in clinical trials? Evidence from the United Kingdom Glaucoma Treatment Study. (PubMed)

Are patient self-reported outcome measures (PROMs) sensitive enough to be used as endpoints in clinical trials? Evidence from the United Kingdom Glaucoma Treatment Study. The United Kingdom Glaucoma Treatment Study (UKGTS) demonstrated the effectiveness of an intraocular pressure-lowering drug in patients with glaucoma using visual field progression as a primary outcome. The present study tested the hypothesis that responses on patient-reported outcome measures (PROMs; secondary outcome measure (...) period was 24 months. Patients completed general health PROMs (European Quality of Life in 5 Dimensions [EQ-5D] and 36-item Short Form [SF-36]) and PROMs specific to glaucoma (15-item Glaucoma Quality of Life [GQL-15] and 9-item Glaucoma Activity Limitation [GAL-9]) at baseline and exit from the trial. Percentage changes between measurement on PROMs were calculated for each patient and compared between treatment arms. In addition, differences between stable patients (n = 272) and those

2018 Ophthalmology

60. International Classification of Functioning, Disability and Health Domains of 60 Physical Functioning Measurement Instruments Used During Adult Intensive Care Unit Stay: A Scoping Review. (PubMed)

International Classification of Functioning, Disability and Health Domains of 60 Physical Functioning Measurement Instruments Used During Adult Intensive Care Unit Stay: A Scoping Review. There has been a recent surge in the creation and adaptation of instruments to measure physical functioning (PF) in the intensive care unit (ICU). A key step to selecting the right measurement instrument is to understand the core constructs that it is measuring in terms of the International Classification (...) of Functioning, Disability and Health (ICF) domains.The purpose of this study was to map the ICF domains and subdomains included in the PF measurement instruments in adult patients during the ICU stay systematically.A systematic search was carried out in Cochrane CENTRAL, PubMed, CINAHL and LILACS as well as a hand search up to May 17, 2017.Study selection included all types of research articles that used at least 1 PF measurement instrument in adult patients within the ICU.Study design, year of publication

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2018 Physical therapy

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