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The comparison of different methods of body fat measuring by ensemble of adult women devided into five groups according to the BMI level
Šebková, Jana ; Matoulek, Martin (advisor) ; Svačina, Štěpán (referee)
Title: The comparison of different methods of body fat measuring by ensemble of adult women devided into five groups according to the BMI level. Objectives: The aim of this thesis is to compare values of gained percentage of total body fat by descriptive method such as bioelectrical impedance analysis and skinfolds measuring in comparison with "gold standard method" DEXA and to evaluate the usability of each method of body composition measuring by five groups of women, devided according to BMI level (in range 20-47 kg/m2 ). The purpose of this thesis is to find the most useful method especially for the overweight and obese women (BMI over 30 kg/m2 ) and to estimate the equation for the whole group. The other part of this thesis is the theoretical conclusion of the matters of body composition assessing and the importance of good knowledge about this topic for physiotherapists. Methods: The study was realizing from January of 2010 to March of 2011. There were 136 women, who were clients of Fitness center of VŠTJ Medicina Praha and jointed to the group voluntarely. The criteria of choosing the subjects into the study were: age 18 - 75 years, BMI 20 ≤ 45 kg/m2 , relatively healthy without accute disease. Women with cardiostimulator, pregnant women or nursing mothers were excluded. The monitored...
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Bioimpedance signal processing
Valíčková, Vladimíra ; Vondra, Vlastimil (referee) ; Soukup, Ladislav (advisor)
Theoretical part of this Bachelor thesis deals with properties measurement and use of bioim-pedance signal for medical diagnostics. The practical part deals with detection of important points in derivate bioimpedance signal that may be further used in various medical applicati-ons. This work compares three detection methods. The best results were achieved by a de-tection with fixed interval there were excluded only 1,09 % values. Very similar results had detector dependent on constant bioimpedance. Here was excreted 1.18 % of detections. Algo-rithms that are dependent on length of RR interval perform worse. Furthermore, there is cal-culated the Pulse wave velocity in six parts of the human body in a horizontal and tilt patient position. In the tilt position were the pulse wave velocity about 38.59 % faster than in hori-zontal.
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Bioimpedance measurement
Pagáčová, Lenka ; Balogh, Jaroslav (referee) ; Sekora, Jiří (advisor)
The work deals with the body analysis using bioimpedance. The work included theory about bioimpedance and methods associated with the analysis. In the practical part is design of the device for measuring body composition including a software for the microcontroller. The assembled device was tested and compared with commercial product Tanita.
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An Electro-Hydrodynamic Model for Bioimpedance Plethysmography
Vyroubal, Petr ; Uruba,, Václav (referee) ; Horák,, Vladimír (referee) ; Maxa, Jiří (advisor)
This doctoral thesis deals with the study of electro-hydrodynamics in the area of numerical modelling of biomechanical systems, concretely in the method of bioimpedance plethysmography. Solving tasks of pulsatile blood flow in the elastic vessel wall is currently one of the most complicated problem in mechanics and biomechanics due to the interaction of two continua on the common boundary. The whole system is additionally loaded by diagnostic electric current. This doctoral thesis was created in cooperation with the Institute of Scientific Instruments of the CAS, v. v. i. Brno with the team engaged in medical signals (the leader Ing. Pavel Jurák, CSc.). Experimental measurements were made independently in the St. Anne's University Hospital Brno in the International Clinical Research Center ICRC and in the Mayo Clinic USA.
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Properties of pulse wave velocity in human body during various excitations
Matejková, Magdaléna ; Halámek, Josef (referee) ; Vondra, Vlastimil (advisor)
The thesis is concerned with the analysis of measuring pulse wave velocity in human body with the aid of whole-body multichannel bioimpedance which was developed at ISI AS CR, v.v.i.. The evaluation of pulse wave velocity can provide us with important information about the state of vessel compliance which is one of the basic parameters informing on their physiological state. The examination of the state of vascular system is a very important part of early diagnostics because its pathological states are the main contributor to the rise of cardiovascular diseases and disease mortality. The thesis is concerned with the theoretical analysis together with the available methods of valuation of the state of vascular system that use measuring of pulse wave velocity. The main part of the thesis deals with the analysis of the whole-body multichannel bioimpedance measurement. The proposed and programmed protocol that summarizes and visualizes all obtained information is a part of this thesis. This is currently used as an output of the experimental measurement by this method. Data file for statistical processing contains the values of the pulse wave velocity of 35 healthy volunteers and subsequently the properties of pulse wave are assessed at various excitations.
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The comparison of selected quality indicators of pork meat
MUŽÍKOVÁ, Monika
The main aim of the thesis is comparison of qualitative indicators of pork meat. The literature review focuses on basic characteristics of pork and development of post mortem changes in which is detected process curing meat and potential quality deviations. In the practical part, there were measured pH values and bioimpedance of two different pig's breeds, including purebred České bílé ušlechtilé and crossbreed of hybrid lines Large White and Landrase. Pigs came from different farms. In all cases values ph and pH corresponded to the normal quality of meat. When the quality indicators were compared between breeds there wasn't statistically significiant difference ( p > 0,05). In the evaulation of correlation dependence, there has been found that the most dependence were pH values and temperatures, then r=-0,5 and r?=25,1%.
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Bio-impedance - using in meat production
ŠPIROCHOVÁ, Lenka
The thesis has been processed articles dealing with the appropriateness of using bioimpedance method using measurement of electrical conductivity (EV) to evaluate the meat quality of pork and beef. It was further investigated the suitability of this method for the detection of PSE (pale, soft, exudative) and DFD (dark, firm, dry) defects, especially defects of PSE pigs for slaughter. Was found optimal level of measurement time EV, as when the best time seems to be EV measurement time from 50 to 60 minutes post mortem. It was also found that measuring the EV 24 hours post mortem is as informative as a pH sufficient for 24 hours after slaughter. This method was used to assess the influence of the length of pigs for slaughter and rest before slaughter on the occurrence of PSE defects, where the highest incidence of this defect occurred in slaughter pigs to transport distances of up to 20 km and rest prior to slaughter up to 2 hours. From the measurement results shows the suitability of this method to determine the quality parameters of beef directly in the slaughterhouse. The advantage of EV measurement method versus pH is easy to handle with the electrode, no propensity to mechanical damage and there is no need for frequent calibration of the electrode.
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Dvoukanálový, komplexní, bioimpedanční signál pro vyhodnocení hemodynamiky
Halámek, Josef ; Vondra, Vlastimil ; Jurák, Pavel ; Verner, Petr
The complex bioimpedance signals measured in the aortal and pulmonary artery directions simultaneously are discussed with respect to the information about the heart activity. All four signals carry some information about the blood flow, this information is partly equivalent (only SNR improvement and some artefact minimizations may be achieved by processing all signals) and partly non-equivalent (different behaviour according to excitation of the cardiovascular system). The more detailed analysis of time evolution of signal parameters according to the used excitation may contribute to new information about the hemodynamic system.
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