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VIBRATION ARTHROMETRY IN ASSESSMENT OF KNEE DISORDERS - THE PROBLEM OF ANGULAR VELOCITY

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Kernohan, George, BARR, DA, MCCOY, GF and MOLLAN, RAB (1991) VIBRATION ARTHROMETRY IN ASSESSMENT OF KNEE DISORDERS - THE PROBLEM OF ANGULAR VELOCITY. JOURNAL OF BIOMEDICAL ENGINEERING, 13 (1). pp. 35-38. [Journal article]

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Abstract

A knee joint that has sustained a painful injury will typically require skillful examination, by an orthopaedic surgeon, for signs of internal damage. These signs include characteristic sounds and vibrations, which are produced by the knee when it is stressed. The technique of vibration arthrometry is being developed to assist the clinical examiner in identifying these vibrations and to improve diagnostic accuracy. To detect and record the knee vibrations, small lightweight accelerometers are positioned on various bony prominences around the knee. These produce electronic signals which permit objective analysis of the vibration characteristics. It has been found that varying the investigative procedure can affect the magnitude of some parameters of the vibration signal. If these parameters are to be used in evidence of knee pathology, the effect of the investigative procedure must be normalized. The efect of speed of joint movement has been quantified in a pilot study involving 24 patients with internal knee damage. Custom-designed hardware was used to measure joint speed as the rate of change of joint angle, which was measured by an electrogoniometer. It was found that the energy content of the vibration, reflected by the peak amplitude and root mean square value was strongly affected by joint speed. However, the characteristic shape of the vibration, reflected by the peak frequency in the harmonic spectrum of the signal, remained similar for the range of joint speed in the investigation.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Nursing
Research Institutes and Groups:Institute of Nursing and Health Research
Institute of Nursing and Health Research > Managing Chronic Illness
ID Code:1304
Deposited By:Professor George Kernohan
Deposited On:02 Jul 2010 10:23
Last Modified:23 Jul 2012 14:52

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