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Measurement and analysis of the blood flow in peripheral vessels by ultrasound Doppler methods
Lepš, Milan ; Sedlář, Martin (referee) ; Vlk, Daniel (advisor)
Nowadays, the Doppler ultrasonography is an essential part in medicine. With it, we can observe acoustic showoff some tissue associated with Doppler measurement of blood flow parameters. It is still using Doppler devices with a continuous signal which are although structurally and technically simpler, but they are suitable for measuring the speed and volume of blood flow in peripheral blood vessels of the upper and lower limbs. There are calculated physiological parameters from the flow curves that are clinically used for assessing the state of blood supply to the body part. We can determine many values from the flow curves, like peripheral resistance, blood flow in systole and diastole, medium speed, etc. Study group of people are male and female students from 18 to 20 years. Doppler measurements have been performed before physical exercise and after physical exercise.
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Evaluation of biosignals and quality assessment of heart assist devices
Kalužová, Adéla ; Vlk,, Daniel (referee) ; Bernard,, Vladan (advisor)
The first part of this bachelor thesis deals with technical problems of apparatuses for heart assistance Heart Mate II LVAD and Levitronix, which are connected with components of apparatuses, parametrs of apparatuses, function of apparatuses, indications and contraindications. In the next part there is description of various biosignals, which are measured according to application of heart support aparatuses. The next aim of this bachelor thesis is suggestion of evalution biosignals, which are monitored and collection of clinical data in which I will statistically evaluated the results and these results will be compared each other and with physiological values. The final aim of this thesis is a reflection of the advantages and disadvantages of the apparatus and discussion.
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Effects of ultrasound on biological materials
Peprníčková, Anna ; PhD, Vladan Bernard, (referee) ; Vlk,, Daniel (advisor)
In this bachelor thesis I deal with effects of ultrasound on biological materials. In theoretical part is write up a literature search about effects of ultrasound on bimacromolecules namely deoxyribonucleic acid (DNA), proteins (BSA) and bacterial cells. Effects of ultrasound was investigated practically on genetically modified bacterias of Escherichia coli. These bacterias were sounded by ultrasound by various frequences for the same time and then their viability was measured on luminometer. The results for ever frequency were compared.
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