Thesis (doctoral)--Uppsala University, 1979. / Includes bibliographical references (p. 20-22).

Thesis (doctoral)--Lund University, 1997. / Added t.p. with thesis statement inserted.

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The goal of this thesis is to investigate the possibility of using vibration analysis to detect and assess a very common joint disease known as osteoarthritis (OA). For this purpose, patients with various levels of OA, healthy to severe OA, were recruited and MRI and vibration recordings were made on both knees. MRI images were analyzed by a radiologist and different symptoms related to osteoarthritis in the knee were scored for each observation. Vibration signals of the patients' knees were recorded using 5 accelerometers placed at different locations of the knee. This thesis divides into two major sections; the first section deals with design of an apparatus (a function specific brace and the electronic hardware) for acquiring and recording vibration data from a patient's knee. The second section deals with the analysis of the recorded data using a combination of signal processing techniques (Fourier and wavelet transforms) and multivariate statistical methods (principal component (PCA) and partial least square (PLS)). The brace designed and built for the purpose of this research has several unique properties not found in commercial knee braces. It provides a robust and secure base for attachment of the sensors to the knee and shows very good adaptation to the dynamics of the knee during motion. In the analysis section we show that combining signal processing and multivariate statistical techniques (such as PCA and PLS) provides strong tools for analysis of the data. The result of our analysis shows that there is a strong correlation between vibration analysis and some of the symptoms of osteoarthritis such as cartilage degeneration and formation of osteophytes. We conclude that vibration signals of the knee joint (crepitus) during flexion/extension cycle of the knee, when it is under stress, can be a good indicator of the general severity of OA in patients. / Thesis / Master of Science (MS)

PREVENTION OF KNEE JOINT INJURIES IN PROFESSIONAL WOMEN VOLLEYBALL OBJECTIVES Objective of this thesis is to explore whether the preventive actions, for elimination of factors that may cause knee joint injuries, are performed in professional junior women volleyball teams. In case of identified deficiencies specific program is created for coaches of junior women volleyball teams. The purpose of program is to act preventively and for that reason to eliminate referred factors. METHODS Data collection method of questionnaire with "open" and "closed" questions was used for field survey. RESULTS We have discovered that preventive actions are not performed in particular in area of knee-joint examination and regeneration. Also plyometric method, compensation exercise and exercise with balance equipment are neglected during workout. Key words: volleyball, injury, knee-joint, prevention

Author: Bc. Eva Kurková Title: Knee osteoarthritis: a biological response to medication class SYSADOA Problem definition: Knee osteoarthritis is a degenerative joint disease which belongs to the most common musculoskeletal diseases. The disease is associated with pain of the knee joints, which causes patients' limitations in activities of daily living. Therefore, the objective of the treatment of osteoarthritis is to reduce the pain and a progression of the disease. To achieve these aims, conservative or surgical methods are used. The conservative methods include, among others, the pharmacological treatment. Since the medicaments from the class SYSADOA are easily available we can use them during treatment. Aim of the thesis: The aim of the thesis is to determine the effect of SYSADOA medication on the 2nd and 3rd degree of the knee osteoarthritis. The effect is determined by patients' subjective evaluations and by the changes of the rheological properties of the knee joint. Method: The survey contains an anamnesis questionnaire and the clinical examination of the knee joint. The rheological properties of the knee joint are evaluated by a special device - knee rheometer that non-invasively and painlessly measures the dependence of the passive resistance of the knee joint on its bending angle. To...

Title: The effect of alcohol drinking on the isokinetic knee strength Objectives: The objective of this thesis is to assess the effect of alcohol on isokinetic knee strength during extension and flexion. Methods: Fifteen volunteers participated in this study. Their age was 23,9 ± 1,9 years, height 179,5 ± 7,2cm and weight 78,5 ± 7,95kg. They were all students from sports faculty. One group of volunteers was given alcohol with juice (0,8g of alcohol to 1kg of fat-free mass), the second group drank only juice. We used the switch design study. We measured isokinetic knee strenght on dynamometer Cybex Humac Norm (Cybex NORM ®, Humac, CA, USA) in three types of angular velocity (6Oř/s, 180ř/s, 240ř/s). The parametrs were peak torque, muscular work, average muscular power and time to peak. Results: We registered statistically significant increase of peak torque, muscular work and average muscular powers when measuring flexion in all the three angular velocities (60ř/s, 180ř/s, 240ř/s). We did not register statistically or effect size significant diference readings of time needed for maximal peak torque when measuring flexion and extension. The only exception was angular speed 240ř/s where we registered a factually significant change in time needed for extensors to reach the maximal peak torque....

Thesis (M.S.)--Boston University