Additional information can be found on the Discussion page.


Target Outcome

Prerequisites

Infrastructure

For more details see Infrastructure/ExperimentationMechanics.

Prerequisite Protocols

Protocols

Tibiofemoral Joint Testing

Primary Conditions

Secondary Conditions

Measurements

Equipment Use Modes

Operating Procedure

Preparation:

The testing procedure assumes that the tibiofemoral joint is prepared according to specimen preparation specifications. See relevant section at Specifications/SpecimenPreparation

Robot-Specimen Assembly & Alignment:

The testing procedures require placement of the specimen on the robot and following the necessary set-up procedures. These are detailed in the Infrastructure/ExperimentationMechanics/simVITRO_setup_tutorial.pdf. Specific to this testing protocol:

Coordinate System Optimization:

Preconditioning:

Testing of Primary Conditions:

Patellofemoral Joint Testing

Primary Conditions

Secondary Conditions

Measurements

Equipment Use Modes

Operating Procedure

Preparation:

The testing procedure assumes that the patellofemoral joint is prepared according to specimen preparation specifications. See relevant section at Specifications/SpecimenPreparation

Robot-Specimen Assembly & Alignment:

The testing procedures require placement of the specimen on the robot and following the necessary set-up procedures. These are detailed in the Infrastructure/ExperimentationMechanics/simVITRO_setup_tutorial.pdf. Specific to this testing protocol:

Coordinate System Optimization (Tibiofemoral Joint):

Acquisition of Quadriceps Line of Action:

Preconditioning:

Testing of Primary Conditions:

Post-calibration of pressure sensor:

After completion of testing, remove the pressure sensor and calibrate again to ensure sensor is not damaged. Refer to Specifications/PressureCalibration.

Specimen Storage

After joint mechanics testing, the specimen should be stored according to storage specifications listed in the specimen preparation page, see Specifications/SpecimenPreparation.

Data Processing

Robotics testing system utilizes "right knee abstraction" for control and data collection. The data, including kinematics-kinetics information and coordinate transformation matrices need to be transformed back to "physical representation" for the left knees for their appropriate description in the physical space. Further details are available at the Infrastructure/ExperimentationMechanics pages, specifically in the file Infrastructure/ExperimentationMechanics/Knee Coordinate Systems.pdf

Data Storage

All joint testing files, including raw and processed kinematics-kinetics data, coordinate transformation matrices, contact pressure measurements, etc. should be uploaded to the in-house data management system (http://cobicore.lerner.ccf.org/midas, accessible only within the Cleveland Clinic network) for prospective organization (Open Knee(s) Community). Following organization, a documented version of the data will be disseminated at Open Knee(s) project site (https://simtk.org/home/openknee).

Data Dissemination

Joint mechanics data should be organized in the in-house data management system (http://cobicore.lerner.ccf.org/midas, accessible only within the Cleveland Clinic network) before dissemination. For each specimen, under joint mechanics folder, a dissemination subfolder should be created. Tibiofemoral and patellofemoral joint data should be organized in there as separate folders that contain subfolders for kinematics-kinetics and for patellofemoral joint only, contact pressures. Kinematics-kinetics folders should have a configuration folder that contains information on anatomical landmarks, registration marker locations, coordinate systems, etc. It should be noted that data on patella registration marker assembly is usually in the tibiofemoral joint kinematics-kinetics folder as the data are collected at the specimen preparation session immediately before tibiofemoral joint testing. This data should be augmented with a file indicating location of points on the patella registration marker assembly in CAD. This file can be found in the source code repository - https://simtk.org/websvn/wsvn/openknee/utl/PatFem_Registration/CAD_PT_DIMENSIONS.txt. A readme file should be added in empty experiment trial folders as a place holder. At the root of the dissemination folder, a readme file should be created to describe the folder structure and data content. These files were created for oks001 and can be used as templates.

For dissemination, the dissemination folder of the relevant specimen should be downloaded from the in-house data management system. The in-house data management system automatically compresses the folder. This file should be uncompressed in the local computer, the folder name should be changed to joint_mechanics-<specimen number>, e.g. joint_mechanics-oks001, and compressed again to create the file for dissemination, e.g. joint_mechanics-oks001.zip. This additional uncompress-compress cycle is anticipated to reduce the file size significantly. The file should be uploaded in the relevant specimen-specific package in the "Downloads" section (if not existing) of the Open Knee(s) project site (https://simtk.org/home/openknee). Appropriate documentation links should be provided, e.g. to the specimen preparation wiki page and to the joint mechanics experimentation specifications wiki page. For citation of the data, any relevant conference abstracts or peer-reviewed journal articles on joint mechanics testing should be listed. The release number should be incremented (see Roadmap for release numbering). It is anticipated that dissemination of joint mechanics data will follow the dissemination of anatomical image sets (see Specifications/ExperimentationAnatomicalImaging, therefore ensuring the existence of a specimen-specific package in the "Downloads" section. If not, a specimen-specific package should be created.

References

Borotikar, Bhushan, Subject specific computational models of the knee to predict anterior cruciate ligament injury, Doctoral Dissertation, Cleveland State University, December 2009.

Grood ES, Suntay WJ. A joint coordinate system for the clinical description of three-dimensional motions: application to the knee. J Biomech Eng. 1983 May;105(2):136-44. PubMed

Specifications/ExperimentationJointMechanics (last edited 2019-04-10 19:51:15 by owings)