Study on the motion analysis of three-dimensional ball mills

Single-port access systems (SPASs) are currently used in human and veterinary surgeries. However, they pose technical challenges, such as instrument crowding, intra- and extracorporeal instrument collision, and reduced maneuverability. Studies comparing the maneuverability of the scopes and instruments in different SPASs are lacking. This study aimed to compare the maneuverability of three different SPASs: the Covidien SILS-port, Storz Endocone, and glove port. A clear acrylic box with artificial skin placed at the bottom was used to mimic the abdominal wall and cavity. The three SPASs were placed from below, and a 10-mm endoscope and 5-mm instrument were introduced. A motion analysis system consisting of 18 cameras and motion analysis software were used to track the movement of the endoscope and instrument, to determine the volume of the cone-shaped, three-dimensional figures over which movement was possible, with higher values indicating greater maneuverability. The Mann–Whitney U test was used for the analysis. The maneuverability of the endoscope alone was significantly higher in the glove port system than in the other two SPASs. When inserting an additional instrument, the maneuverability significantly decreased in the SILS-port and Endocone, but not in the glove port. The highest maneuverability overall was found in the glove port.

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Validity and reliability of smartphone applications for measurement of hip rotation, compared with three‐dimensional motion analysis

BMC Musculoskeletal Disorders ◽

10.1186/s12891-021-03995-2 ◽

2021 ◽

Vol 22 (1) ◽

Author(s):

Phob Ganokroj ◽

Nuchanun Sompornpanich ◽

Pichitpol Kerdsomnuek ◽

Bavornrat Vanadurongwan ◽

Pisit Lertwanich

Keyword(s):

Internal Rotation ◽

Motion Analysis ◽

Supine Position ◽

External Rotation ◽

Three Dimensional ◽

Angle Measurement ◽

Smartphone Applications ◽

Rater Reliability ◽

Link Type ◽

Hip Rotation

Abstract Background Measurement of hip rotation is a crucial clinical parameter for the identification of hip problems and the monitoring of symptoms. The objective of this study was to determine whether the use of two smartphone applications is valid and reliable for the measurement of hip rotation. Methods An experimental, cross-sectional study was undertaken to assess passive hip internal and external rotation in three positions by two examiners. The hip rotational angles were measured by a smartphone clinometer application in the sitting and prone positions, and by a smartphone compass application in the supine position; their results were compared with those of the standard, three-dimensional, motion analysis system. The validities and inter-rater and intra-rater reliabilities of the smartphone applications were evaluated. Results The study involved 24 participants. The validities were good to excellent for the internal rotation angles in all positions (ICC 0.81–0.94), good for the external rotation angles in the prone position (ICC 0.79), and fair for the sitting and supine positions (ICC 0.70–0.73). The measurement of the hip internal rotation in the supine position had the highest ICC value of 0.94 (0.91, 0.96). The two smartphone applications showed good-to-excellent intra-rater reliability, but good-to-excellent inter-rater reliability for only three of the six positions (two other positions had fair reliability, while one position demonstrated poor reliability). Conclusions The two smartphone applications have good-to-excellent validity and intra-rater reliability, but only fair-to-good inter-rater reliability for the measurement of the hip rotational angle. The most valid hip rotational position in this study was the supine IR angle measurement, while the lowest validity was the ER angle measurement in the sitting position. The smartphone application is one of the practical measurements in hip rotational angles. Trial registration Number 20181022003 at the Thai Clinical Trials Registry (http://www.clinicaltrials.in.th) which was retrospectively registered at 2018-10-18 15:30:29.

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Analysis of 3-D Kinematics Using H-Gait System during Walking on a Lower Body Positive Pressure Treadmill

Sensors ◽

10.3390/s21082619 ◽

2021 ◽

Vol 21 (8) ◽

pp. 2619

Author(s):

Yoshiaki Kataoka ◽

Ryo Takeda ◽

Shigeru Tadano ◽

Tomoya Ishida ◽

Yuki Saito ◽

...

Keyword(s):

Motion Analysis ◽

Wearable Sensors ◽

Three Dimensional ◽

Lower Limbs ◽

Positive Pressure ◽

Lower Body ◽

Lower Body Positive Pressure ◽

Gait Kinematics ◽

Peak Knee ◽

Body Positive

Recently, treadmills equipped with a lower-body positive-pressure (LBPP) device have been developed to provide precise body weight support (BWS) during walking. Since lower limbs are covered in a waist-high chamber of an LBPP treadmill, a conventional motion analysis using an optical method is impossible to evaluate gait kinematics on LBPP. We have developed a wearable-sensor-based three-dimensional motion analysis system, H-Gait. The purpose of the present study was to investigate the effects of BWS by a LBPP treadmill on gait kinematics using an H-Gait system. Twenty-five healthy subjects walked at 2.5 km/h on a LBPP treadmill under the following three conditions: (1) 0%BWS, (2) 25%BWS and (3) 50%BWS conditions. Acceleration and angular velocity from seven wearable sensors were used to analyze lower limb kinematics during walking. BWS significantly decreased peak angles of hip adduction, knee adduction and ankle dorsiflexion. In particular, the peak knee adduction angle at the 50%BWS significantly decreased compared to at the 25%BWS (p = 0.012) or 0%BWS (p < 0.001). The present study showed that H-Gait system can detect the changes in gait kinematics in response to BWS by a LBPP treadmill and provided a useful clinical application of the H-Gait system to walking exercises.

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BIOMECHANICAL ANALYSIS OF THE STANDING LONG JUMP

Biomedical Engineering Applications Basis and Communications ◽

10.4015/s1016237203000286 ◽

2003 ◽

Vol 15 (05) ◽

pp. 186-192 ◽

Cited By ~ 12

Author(s):

WEN-LAN WU ◽

JIA-HROUNG WU ◽

HWAI-TING LIN ◽

GWO-JAW WANG

Keyword(s):

Knee Joint ◽

Motion Analysis ◽

Joint Angle ◽

Three Dimensional ◽

The Body ◽

Initial Angle ◽

Knee Joint Angle ◽

Standing Long Jump ◽

Long Jump ◽

Arm Motion

The purposes of the present study were to (1) investigate the effects of the arm movement and initial knee joint angle employed in standing long jump by the ground reaction force analysis and three-dimensional motion analysis; and (2) investigate how the jump performance of the female gender related to the body configuration. Thirty-four healthy adult females performed standing long jump on a force platform with full effort. Body segment and joint angles were analyzed by three-dimensional motion analysis system. Using kinetic and kinematic data, the trajectories on mass center of body, knee joint angle, magnitude of peak takeoff force, and impulse generation in preparing phase were calculated. Average standing long jump performances with free arm motion were +1.5 times above performance with restricted arm motion in both knee initial angles. The performances with knee 90° initial flexion were +1.2 times above performance with knee 45° initial flexion in free and restricted arm motions. Judging by trajectories of the center mass of body (COM), free arm motion improves jump distance by anterior displacement of the COM in starting position. The takeoff velocity with 90° knee initial angle was as much as 11% higher than in with 45° knee initial angle. However, the takeoff angles on the COM trajectory showed no significant differences between each other. It was found that starting jump from 90° bend knee relatively extended the time that the force is applied by the leg muscles. To compare the body configurations and the jumping scores, there were no significant correlations between jump scores and anthropometry data. The greater muscle mass or longer leg did not correlated well with the superior jumping performance.

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Three-dimensional Motion Analysis of the Ankle during Backward Walking

Journal of Physical Therapy Science ◽

10.1589/jpts.25.747 ◽

2013 ◽

Vol 25 (6) ◽

pp. 747-749 ◽

Cited By ~ 7

Author(s):

Naoki Soda ◽

Tsutomu Ueki ◽

Takaaki Aoki

Keyword(s):

Motion Analysis ◽

Three Dimensional ◽

Backward Walking

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A three dimensional ball quotient

Mathematische Zeitschrift ◽

10.1007/s00209-013-1203-4 ◽

2013 ◽

Vol 276 (1-2) ◽

pp. 345-370

Author(s):

Eberhard Freitag ◽

Riccardo Salvati Manni

Keyword(s):

Three Dimensional ◽

Dimensional Ball

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Distal radius fractures result in alterations in scapular kinematics: A three-dimensional motion analysis

Clinical Biomechanics ◽

10.1016/j.clinbiomech.2014.12.015 ◽

2015 ◽

Vol 30 (3) ◽

pp. 296-301 ◽

Cited By ~ 5

Author(s):

Cigdem Ayhan ◽

Elif Turgut ◽

Gul Baltaci

Keyword(s):

Motion Analysis ◽

Distal Radius ◽

Three Dimensional ◽

Distal Radius Fractures ◽

Radius Fractures ◽

Scapular Kinematics

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Efficacy of Rehabilitation in Parkinson's Disease Patients using the Unified Parkinson's Disease Rating Scale (UPDRS) and Three-dimensional Motion Analysis

The Japanese Journal of Rehabilitation Medicine ◽

10.2490/jjrmc.47.791 ◽

2010 ◽

Vol 47 (11) ◽

pp. 791-800 ◽

Cited By ~ 1

Author(s):

Nobuo TAKEZAWA ◽

Masanori NAKAGAWA

Keyword(s):

Parkinson’S Disease ◽

Parkinson's Disease ◽

Motion Analysis ◽

Rating Scale ◽

Three Dimensional ◽

Disease Rating

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Three-Dimensional Motion Analysis of the 2nd Cervical Spinous Process at End Range Cervical Rotation in Different Scapular Positions Using 3D Digitizer

BioMed Research International ◽

10.1155/2018/9835846 ◽

2018 ◽

Vol 2018 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Takahiro Otsudo ◽

Kiyokazu Akasaka ◽

Hiroshi Hattori ◽

Yuki Hasebe ◽

Akihiro Tamura ◽

...

Keyword(s):

Cervical Spine ◽

Motion Analysis ◽

Reliable Method ◽

Spinous Process ◽

Three Dimensional ◽

Healthy Adults ◽

Upper Cervical ◽

Spine Disorders ◽

Cervical Rotation

Objective. The study used a 3D digitizer to determine three-dimensional motion analysis of the 2nd cervical (C2) spinous process at end range cervical rotation with the scapula in different positions. Methods. 30 healthy adults participated in this study. Different scapula positions were adopted bilaterally and positioned passively at normal resting, depression, adduction, and abduction. Under each scapula position, bilateral end range cervical rotation and displacement of the C2 spinous process were analyzed by a 3D digitizer. Results. Displacement of the C2 spinous process relative to the occiput was significantly correlated with range of cervical rotation under all scapular positions (p<0.05). However, there were no significant differences between end range cervical rotation and displacement of the C2 spinous process relative to the occiput in any scapular position. Conclusion. These results suggest that measurement of upper cervical mobility using the 3D digitizer is a reliable method that holds promise in the evaluation of people with cervical spine disorders.

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