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Design of parts of tribometer with reciprocating motion
Dražka, Ondřej ; Vrbka, Martin (referee) ; Čípek, Pavel (advisor)
The bachelor thesis deals with design of parts of tribometer with reciprocating motion. Several conceptual solutions are made on base of existing studies from which the best solution for given application is selected. The tribometer will be used for experimental measuring on real cartilage which should lead to better understanding of friction and lubrication processes in synovial joint. The outcome of this thesis are component parts along with the manufacturing drawings.
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Polyethylene wear particles around joint replacements - their properties, distribution and possible mechanism of their adverse biological effects
Zolotarevová, Eva ; Gallo, Jiří (advisor) ; Rauch, Pavel (referee) ; Horák, Zdeněk (referee)
CHARLES UNIVERSITY IN PRAGUE FACULTY OF SCIENCE DEPARTMENT OF BIOCHEMISTRY PRAGUE 2010 Supervisor: Doc. MUDr. Jiří Gallo, PhD. Supervisor-consultant: Prof. RNDr. Gustav Entlicher, CSc. Eva Zolotarevová Summary of PhD Thesis POLYETHYLENE WEAR PARTICLES AROUND TOTAL JOINT REPLACEMENTS - THEIR PROPERTIES, DISTRIBUTION AND POSSIBLE MECHANISM OF THEIR ADVERSE BIOLOGICAL EFFECTS PRAGUE 2010 The research project was supported by the Grant project of National research program II. (no. 2B06096) of the Czech Ministry of Education, Youth and Sports named "Observation and minimization of UHMWPE wear in joint replacements". Front-page picture: Polyethylene wear particle isolated from granuloma tissue surrounding total hip replacement; Electron microscope microphotograph; particle size app. 90 x 80 µm; retouched Eva Zolotarevová Introduction Introduction For many people all over the world a replacement with an implant of irreversibly damaged joint is often the only way how to come back to normal life without pain and mobility limitation. Nowadays, greater and greater requirements are asked of quality of all replacement components, especially in terms of quality of used materials. Biomechanical properties of hip and knee replacements have been already solved. The most often used materials for manufacturing joint...
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Assesment of quality of postoperative analgesic care
Rákosová, Andrea ; Burišková, Klára (advisor) ; Hakenová, Renata (referee)
Introduction: The acute postoperative pain management is recently a concern of many expert committees and professional associations. The evidence of an increased interest in this issue is the Practice Guidelines for Acute Pain Management released by American Pain Society. According to these recommendations, the pain should be monitored as a fifth vital function. As a logical consequence of modern trends of pain management, Czech Society of Anaesthesiology and Intensive Care Medicine issued guidelines for acute pain management in postoperative setting. This paper is an attempt to describe and evaluate the quality of postoperative analgetic care after total knee and hip replacements in a selected institution's department.………………………………..…………………………………… Methods: The aim of our empirical survey was to assess the level of quality of postoperative care and analgesia in the selected department. We focused mainly on the question of pain trivializing from the nurses side, their approach towards patients suffering from acute pain and, finally, the level of patient's awareness of pain intensity assessment systems and treatment options. Using the quantitative research methods, we evaluated the differences in perceiving of postoperative pain treatment quality from patient's and nurse's point of view. The survey...
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Polyethylene wear particles around joint replacements - their properties, distribution and possible mechanism of their adverse biological effects
Zolotarevová, Eva
This PhD thesis in essence rounds off the range of queries asked several years ago when the task was set by Doc. RNDr. Zdenek Horak, PhD. The original isolation procedure for polyethylene wear particles, identification of some of their physico-chemical properties and manipulation accordingly has been successful in the process of this thesis accomplishment. It became possible to quantify the particles at relative as well as absolute scale. The thesis managed to disprove the published opinion that centrifugation can affect the morphology of isolated particles. The issue of distribution of polyethylene wear particles around hip endoprothesis has been solved at two levels: "macroscopically", the distribution of wear particles in zones around endoprosthesis was showed (this thesis does not include these data). Furthermore, at the "microscopic" level, the distribution of wear particles in granuloma tissue from the zones surrounding endoprostheses with most particles has been determined. The granuloma tissue formed in zones with most particles because of that. It was observed that the common term - osteoagressive granuloma - used by orthopedist is rather misguided. Granuloma is not aggressive to bone tissue. On the contrary, the granuloma formation reduces the effective amount of wear particles with...
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Assesment of quality of postoperative analgesic care
Rákosová, Andrea ; Burišková, Klára (advisor) ; Hakenová, Renata (referee)
Introduction: The acute postoperative pain management is recently a concern of many expert committees and professional associations. The evidence of an increased interest in this issue is the Practice Guidelines for Acute Pain Management released by American Pain Society. According to these recommendations, the pain should be monitored as a fifth vital function. As a logical consequence of modern trends of pain management, Czech Society of Anaesthesiology and Intensive Care Medicine issued guidelines for acute pain management in postoperative setting. This paper is an attempt to describe and evaluate the quality of postoperative analgetic care after total knee and hip replacements in a selected institution's department.………………………………..…………………………………… Methods: The aim of our empirical survey was to assess the level of quality of postoperative care and analgesia in the selected department. We focused mainly on the question of pain trivializing from the nurses side, their approach towards patients suffering from acute pain and, finally, the level of patient's awareness of pain intensity assessment systems and treatment options. Using the quantitative research methods, we evaluated the differences in perceiving of postoperative pain treatment quality from patient's and nurse's point of view. The survey...
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Design of parts of tribometer with reciprocating motion
Dražka, Ondřej ; Vrbka, Martin (referee) ; Čípek, Pavel (advisor)
The bachelor thesis deals with design of parts of tribometer with reciprocating motion. Several conceptual solutions are made on base of existing studies from which the best solution for given application is selected. The tribometer will be used for experimental measuring on real cartilage which should lead to better understanding of friction and lubrication processes in synovial joint. The outcome of this thesis are component parts along with the manufacturing drawings.
|
|
|
Polyethylene wear particles around joint replacements - their properties, distribution and possible mechanism of their adverse biological effects
Zolotarevová, Eva
This PhD thesis in essence rounds off the range of queries asked several years ago when the task was set by Doc. RNDr. Zdenek Horak, PhD. The original isolation procedure for polyethylene wear particles, identification of some of their physico-chemical properties and manipulation accordingly has been successful in the process of this thesis accomplishment. It became possible to quantify the particles at relative as well as absolute scale. The thesis managed to disprove the published opinion that centrifugation can affect the morphology of isolated particles. The issue of distribution of polyethylene wear particles around hip endoprothesis has been solved at two levels: "macroscopically", the distribution of wear particles in zones around endoprosthesis was showed (this thesis does not include these data). Furthermore, at the "microscopic" level, the distribution of wear particles in granuloma tissue from the zones surrounding endoprostheses with most particles has been determined. The granuloma tissue formed in zones with most particles because of that. It was observed that the common term - osteoagressive granuloma - used by orthopedist is rather misguided. Granuloma is not aggressive to bone tissue. On the contrary, the granuloma formation reduces the effective amount of wear particles with...
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Polyethylene wear particles around joint replacements - their properties, distribution and possible mechanism of their adverse biological effects
Zolotarevová, Eva ; Gallo, Jiří (advisor) ; Rauch, Pavel (referee) ; Horák, Zdeněk (referee)
CHARLES UNIVERSITY IN PRAGUE FACULTY OF SCIENCE DEPARTMENT OF BIOCHEMISTRY PRAGUE 2010 Supervisor: Doc. MUDr. Jiří Gallo, PhD. Supervisor-consultant: Prof. RNDr. Gustav Entlicher, CSc. Eva Zolotarevová Summary of PhD Thesis POLYETHYLENE WEAR PARTICLES AROUND TOTAL JOINT REPLACEMENTS - THEIR PROPERTIES, DISTRIBUTION AND POSSIBLE MECHANISM OF THEIR ADVERSE BIOLOGICAL EFFECTS PRAGUE 2010 The research project was supported by the Grant project of National research program II. (no. 2B06096) of the Czech Ministry of Education, Youth and Sports named "Observation and minimization of UHMWPE wear in joint replacements". Front-page picture: Polyethylene wear particle isolated from granuloma tissue surrounding total hip replacement; Electron microscope microphotograph; particle size app. 90 x 80 µm; retouched Eva Zolotarevová Introduction Introduction For many people all over the world a replacement with an implant of irreversibly damaged joint is often the only way how to come back to normal life without pain and mobility limitation. Nowadays, greater and greater requirements are asked of quality of all replacement components, especially in terms of quality of used materials. Biomechanical properties of hip and knee replacements have been already solved. The most often used materials for manufacturing joint...
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Laboratory methods for diagnostic infections total prosthesis articulations
HRONÍČKOVÁ, Lenka
Prosthesis articulations and their infectious complications are currently a much discussed problem among orthopaedists and microbiologists. The most operations are performed especially at hip and knee joints. The main reason for their most frequent damage is secondly the fact that endoprostheses of these joints have a good possibility of fixing of plastic materials into the bone and a long lifetime. Endoprostheses are used also in joints of shoulders, elbows etc. Despite of all aseptic procedures infection development sometimes appears. This complication is the most common cause of endoprostheses damage and it is often the reason for re-operation. The development of infection depends on interactions between a micro-organism, prosthesis articulations and a host. Bacterial agents causing infections of prosthesis articulations include gram-positive cocci, especially Staphylococcus aureus and Staphylococcus epidermidis, sometimes even streptococci. Further they could be gram-negative bars, especially Escherichia coli, Proteus species, Pseudomonas aeruginosa, Enterobacter species a Serratia marcescens etc. In mixed infections there can also appear anaerobic bacteria, especially Propionibacterium acnes and anaerobic streptococci. Most of bacterial agents are a part of so called bio film, which is important for bacteria and their survival. Bacteria in bio film acquire matrix protection against the effect of antibodies and phagocytes and also against the effects of antibiotics. Implementation of new laboratory procedures and methods, when among others ultrasound is used to destroy bio film, and making further cultivation and identification of infectious agents easier proved as a contribution. It leads to significantly higher capture of etiological agents of infectious complications of prosthesis articulations and this way it contributes to better securing of re-implantations. Procedures and methods presented in this thesis can be used in other modifications at examination of other inorganic materials and implantations and at examination of tissues taken out of patient ´s body at various infectious complications. Presented thesis compares laboratory procedures and methods used so far at OLM (Department of Medical Microbiology) in Nemocnice Jindřichův Hradec, a.s. (Hospital in Jindřichův Hradec, Ltd.) with laboratory procedures newly implemented for this purpose to examine infections of prosthesis articulations in cooperation with the author of presented thesis in spring months of 2008.
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