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Validaton of multichannel bioimpedance of vessels using synchronized vascular ultrasonography
Hidegová, Simona ; Kolářová, Jana (referee) ; Mézl, Martin (advisor)
The inclusion of a new device in clinical practice requires an adequate validation. The original publication which introduced multichannel bioimpedance monitor MBM was focused on discribing its technical parameters and demonstration measurements. Further evaluation desires comparision with other standard measuring device. This thesis describes pulse wave measurement by MBM and by other medical devices used for establishing cardiovascular risk. It proposes the validation experiment with synchronized vascular ultrasonography as a reference method. The process of the experimental measurement, aquired data and following data analysis are described in detail. The outputs of the experiment are statistically evaluated. The MBM’s performance and design of the experiment are discussed.
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Prognostic Siginificance of Sarcopenia in Patients with Liver Cirrhosis
Kozlova, Marina ; Brůha, Radan (advisor) ; Meisnerová, Eva (referee)
Introduction: Sarcopenia is a common complication of liver cirrhosis and has a significant negative effect on the clinical outcome and prognosis of patients. Sarcopenia is manifested by a loss of muscle mass and a decline in muscle strength and overall physical performance. X-ray examination is the most accurate method in the diagnosis of sarcopenia, but it is unknown to what extent the prognosis of liver cirrhosis can be predicted by non-invasive and broadly available anthropometric measurements and functional tests combined with the analysis of routine laboratory data. The aim of the work is to find factors related to the severity of liver cirrhosis, the occurrence of complications and survival of patients with a focus on muscle mass, muscle strength and physical performance. Methods: The observational study included 20 patients of the IV. Department of Internal Medicine of the General University Hospital in Prague (VFN) - Clinics of Gastroenterology and Hepatology diagnosed with liver cirrhosis. The progress of cirrhosis was assessed with MELD and Child-Pugh scores. Patients were examined twice, once during hospitalization and 3 months later. Functional tests of hand grip strength, chair stand test, NCT test and quality of life questionnaire were performed. Other measurements included...
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Conductive model of human tissue for electroporation purposes
Zelinková, Kateřina - Šarlota ; Cipín, Radoslav (referee) ; Novotná, Veronika (advisor)
This thesis solves the issue of the distribution of the high voltage pulse at the electroporation of the arget ablation zone. For futher examination of influence electroporation was necessary to first understand theoretically electrical charakter of cells and replace with basics eletrical circumferential elements (RLC). Based on this knowledge, theoretical prerequisites for experimental measurements were derived. Theoretical assumptions were then verified by experimental measurements. In the measurement, the assumptions found were confirmed, but significant performance losses were identified. A new catheter was designed to reduce the loss. Because the production of a new catheter is not economically disadvantageous, the properties of the new catheter were first tested using the simulation cloud environment SIMSCALE, where the heating of the heart tissue after the application of the electroporation pulse was monitored. Furthermore, the electroporation process was simulated in the FEMM program, where emphasis was placed on the propagation of cardiac tissue tension.
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Body Composition and Motor Performance of Roma Children in the Most District
Česák, Petr ; Bunc, Václav (advisor) ; Havel, Zdeněk (referee) ; Kutáč, Petr (referee)
Title: Body Composition and Motor Performance of Roma Children in the Most District Background: The Roma way of life, or rather the values they live up to, is different from the values and way of life of the majority population. This results in a lower life expectancy of the Roma and a worse social position in Czech society, even in total social exclusion. Since the individual's lifestyle evolves from childhood on, we focused on assessing the lifestyle using several parameters of body composition and motor performance of Roma children in socially excluded Roma localities Aims: The aim of this thesis is to find out the influence of the lifestyle of Roma children living in socially excluded Roma localities in the Most district on their body composition and motor performance. The second goal is to compare the body composition and motor performance of the children from majority population and socially excluded children from the Most district with the Czech children population standards. Methods: In total 733 children 7-15 years of age participated in the study, of which 448 were from majority population of the Most district (221 girls and 227 boys) and 285 children were from socially excluded Roma localities in the Most district (124 girls and 161 boys). Bioelectric impedance analysis (BIA 2000 M...
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Diagnosing of muscular imbalances in cross-country skiers using tensiomyography
Novák, Karel ; Šteffl, Michal (advisor) ; Jindra, Matouš (referee)
Title: Diagnosing of muscular imbalances in cross-country skiers using tensiomyography Objectives: Objective of the thesis was to define hypothesis about impact of cross-country skiing on musculoskeletal system, most importantly the origin of muscular unbalance, on cross-country skiers using tensiomyograph TMG 100 and bioimpedance InBody 720. Methods: This bachelor's thesis was conducted as qualitative research. It consists of six case studies. We examined the presence of muscular imbalance of back muscles in cross country skiers. Tensiomyograph TMG 100 and bioimpendace InBody 720 were used during this examination. Results: Based on results from examination of six respondents we found out, that there could be muscular unbalance from the standpoint of lateral symmetry, mostly in m. erector spinae. Conclusion: Based on six case studies, were formulated two hypothesis that take in account possible muscular unbalance of m. erector spinae and m. trapezius inferior that could be formed by specific usage by cross-country skiers. Keywords: tensiomyograph, muscular unbalance, cross-country skiing, bioimpedance
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Body composition in children with different movement programm
Kučera, Jan ; Bunc, Václav (advisor) ; Kinkorová, Ivana (referee)
Title: Body composition in children with different movement programm Objectives: The main objektive of this work is analysis of body composition while using BIA method children of younger school age and consired differences in physical components with regard to different movement programm. Methodes: Body composition was measured by bioelectrical impedance analysis device Bodystat 1500. Data was processed in Microsoft Excel. Followed parameters are the percentage of body fat, the absolute amount of fat-free mass in kg, the proportion of total body water. The research participated in total 75 probands agend 10-11 years of average height 147,7 cm and weight 42,1 kg. The research includes regularly training 25 children from RC Mountfield Říčany (training 3 times a week + 2x physical education) with a medium to hight intensity exersice of 360 minutes per week, regularly training 25 children from Říčany Fight Club (2x weekly training + 2x physical education) with a medium to hight intensity exersice of 270 minutes per week and 25 children from the Nemo Říčany Elementary School where the physical education 90 minutes per week. The research group is made up of boys only, because girl with a higher percentage of total body fat have a higher BFM then boys. Results: The average proportion of body fat in boys...
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Autonomous Impedance Meter
Voda, Zbyšek ; Mrázek, Vojtěch (referee) ; Vašíček, Zdeněk (advisor)
This thesis deals with design of a smart embedded device for autonomous measurement of impedance optimized for measurement of biological materials. The goal is to create a device which provides a simple web interface which allows users to capture and further analyze measured data. The digital part is based on MT7688 SoC with WiFi capabilities. The analogue part utilizes a single-chip integrated solution AD5933 that is tightly coupled with a custom analogue frontend whose function is to modify the signal to avoid a potential damage of biological samples. The proposed device is able to either measure impedance for a single frequency or perform a frequency sweep across the whole range beginning at 50Hz and ending at 100 kHz. It supports common two-electrode probes as well as more precise four-electrode probes. The analogue frontend has been simulated using the SPICE simulator to avoid a potential design bug. The experimental evaluation shows that the achieved precision for the typical impedance of biological samples is better than 0.5%.
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Bioimpedance Signal Processing
Valíčková, Vladimíra
This study deals with detection of important points in derivate bioimpedance signal that may be further used in various medical applications, for example in calculation of the Pulse wave velocity. This work compares three detection methods. The best results were achieved by a detection with fixed interval. Algorithms that are dependent on constant bioimpedance and length of RR interval perform worse.
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Using TMG to diagnose muscle imbalances in Jumping
Burgetová, Dominika ; Šteffl, Michal (advisor) ; Kolbová, Kateřina (referee)
Title: Using TMG to diagnose muscle imbalances in Jumping Objectives: The aim of this work was to define a hypothesis about the relation of training load in jumping and muscle imbalances in selected muscle groups using the tensiomyograph TMG and bioimpedance InBody 720. Methods: The bachelor thesis has the character of qualitative research. In particular, five case studies have been carried out, emphasizing the detection of characteristic muscle imbalances that could arise from the training load in Jumping. The tensiomicrograph TMG 100 and bioimpedance InBody 720 were used to measure muscle imbalances. Results: Based on the measurement of five participants, muscle imbalances were found primarily in the gastrocnemicus lateralis, semitendinosus and tibialis anterior. In functional symmetry the most frequently imbalances were found in the ankle muscle groups where tibialis anterior was compared against gastrocnemicus lateralis and gastrocnemicus medialis, and subsequently the imbalances in the legs where gastrocnemicus lateralis and medialis were compared against vastus lateralis and medialis. We also found functional imbalances in the knee where the biceps femoris muscle acted against vastus lateralis, vastus medialis and rectus femoris. Keywords: tensiomyograph, muscle asymmetry, trampolines,...
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Methods of subcutaneous fat measurement
Marek, Vojtěch ; Harabiš, Vratislav (referee) ; Chlíbková, Daniela (advisor)
The thesis studies comparsion of methods of subcutaneous fat measurements. It briefly describes body composition, and deals with research of the most important methods. It describes used devices, which were used. It deals with statistical evaluation of measured data. This thesis approves, that results are different among the devices on statistically significant level, simultaneously there wasnt clear factor, that would have caused it.
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