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A Comparison of Inertial Measurement Unit and Motion Capture Measurements of Tibiofemoral Kinematics during Simulated Pivot Landings.
Baek, So Young; Ajdaroski, Mirel; Shahshahani, Payam Mirshams; Beaulieu, Mélanie L; Esquivel, Amanda O; Ashton-Miller, James A.
Afiliación
  • Baek SY; Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.
  • Ajdaroski M; Department of Mechanical Engineering, University of Michigan-Dearborn, Dearborn, MI 48128, USA.
  • Shahshahani PM; Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.
  • Beaulieu ML; Department of Orthopedic Surgery, University of Michigan, Ann Arbor, MI 48109, USA.
  • Esquivel AO; Department of Mechanical Engineering, University of Michigan-Dearborn, Dearborn, MI 48128, USA.
  • Ashton-Miller JA; Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.
Sensors (Basel) ; 22(12)2022 Jun 11.
Article en En | MEDLINE | ID: mdl-35746217
Injuries are often associated with rapid body segment movements. We compared Certus motion capture and APDM inertial measurement unit (IMU) measurements of tibiofemoral angle and angular velocity changes during simulated pivot landings (i.e., ~70 ms peak) of nine cadaver knees dissected free of skin, subcutaneous fat, and muscle. Data from a total of 852 trials were compared using the Bland-Altman limits of agreement (LoAs): the Certus system was considered the gold standard measure for the angle change measurements, whereas the IMU was considered the gold standard for angular velocity changes. The results show that, although the mean peak IMU knee joint angle changes were slightly underestimated (2.1° for flexion, 0.2° for internal rotation, and 3.0° for valgus), the LoAs were large, ranging from 35.9% to 49.8%. In the case of the angular velocity changes, Certus had acceptable accuracy in the sagittal plane, with LoAs of ±54.9°/s and ±32.5°/s for the tibia and femur. For these rapid motions, we conclude that, even in the absence of soft tissues, the IMUs could not reliably measure these peak 3D knee angle changes; Certus measurements of peak tibiofemoral angular velocity changes depended on both the magnitude of the velocity and the plane of measurement.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tibia / Articulación de la Rodilla Límite: Humans Idioma: En Revista: Sensors (Basel) Año: 2022 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Suiza
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tibia / Articulación de la Rodilla Límite: Humans Idioma: En Revista: Sensors (Basel) Año: 2022 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Suiza