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Knee Joint

Knee Joint

The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris group...

Net Torque Calculations

Net Torque Calculations

When a mechanic tries to remove a hex nut with a wrench, it is easier if the force is applied at the farthest end of the wrench handle. The lever arm is the distance from the pivot point (the hex nut in this case) to the person’s hand. If this distance is large, the torque is higher. Only the component of the force perpendicular to the lever arm contributes to the torque. Therefore, pushing the wrench perpendicular to the lever arm is more advantageous. If multiple people apply force to rotate...

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Improving Strength, Power, Muscle Aerobic Capacity, and Glucose Tolerance through Short-term Progressive Strength Training Among Elderly People

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A purpose-built dynamometer to objectively measure static and dynamic knee torque.

U C Ugbolue¹, K T Kaliarntas, S C Wearing

¹Department of Bioengineering, University of Strathclyde, Wolfson Building, 106 Rottenrow, Glasgow, G4 ONW, UK. ukadike.ugbolue@strath.ac.uk

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine

|July 16, 2011

Summary

This summary is machine-generated.

A new purpose-built knee dynamometer (PBKD) accurately measures knee range of motion and isometric muscle strength. This validated device shows promise for clinical rehabilitation and distinguishing knee pathologies.

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Area of Science:

Biomechanics
Medical Devices
Rehabilitation Engineering

Background:

Accurate assessment of knee function is crucial for clinical diagnosis and rehabilitation.
Existing methods for measuring knee range of motion (ROM) and muscle strength may have limitations in objectivity and reliability.
Development of specialized devices is needed to enhance the precision of these measurements.

Purpose of the Study:

To report the development and validation of a purpose-built knee dynamometer (PBKD).
To evaluate the PBKD's ability to objectively measure passive knee range of motion (ROM) and isometric muscle strength.
To establish the validity and reliability of the PBKD for knee function assessment.

Main Methods:

The PBKD incorporates a TorqSense rotary torque transducer for objective measurements.
The device and instrumentation underwent rigorous dynamic and static calibration.
Validation involved comparing PBKD measurements with a KIN-COM machine and assessing measurement consistency across trials in healthy participants.

Main Results:

The PBKD demonstrated valid and reliable measurements of isometric knee muscle strength and passive range of motion.
No significant differences were found in passive or isometric measurements between cycles and trials.
Preliminary results confirmed the device's ability to obtain accurate and consistent knee ROM and muscle strength data.

Conclusions:

The purpose-built knee dynamometer (PBKD) is a reliable and accurate tool for assessing knee function.
The PBKD has significant potential for widespread application in clinical and rehabilitation settings.
This device can serve as a valuable functional outcome measure for differentiating between pathological and non-pathological knees.