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Mullite Refractory Grog
Zemánek, David ; Tvrdík,, Lukáš (referee) ; Nevřivová, Lenka (advisor)
Refractory aggregate manufactured from common clays, claystones and shales in Czech Republic are mostly classified as fireclay. For specific applications are these grogs not suitable and there is a need to use grogs with higher content of alumina oxide. Theoretical part of this thesis is focused on the mineral mullite, which is one of the basic minerals in Al2O3 - SiO2 system. Research is focused on methods of mullite production, manufacture of recfractory grog and new possibilities in modification of current raw materials. In experimental part is carried out a verification of possible production of grogs with increased alumina content according to the designed composition.
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Production of refractory aggregate in blast furnaces
Zemánek, David ; Tvrdík,, Lukáš (referee) ; Nevřivová, Lenka (advisor)
Firing of refractory aggregate takes place in blast or rotary furnaces. Raw materials for firing are refractory clays, claystones and shales. Sorting and sieving is performed before firing, in which occurs to formation of the fine clay. This waste is not useful for firing in common way in blast furnaces. Possibility, how to solve this problem, seems to be briquetting of fine clays. This method of proccesing fine clays brings with it new possibilities in refractory aggregate production. By adding a suitable correction material, such as mullite powder, special refractory grog with required properties can be produced on customers wishes.
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The Nursing Care about the Patient with Hypertrophic Obstructive Cardiomyopathy after Alcohol Septal Ablation
Hanzlíková, Miroslava ; Bakusová, Tereza (advisor) ; Zemánek, David (referee)
The theme of this bachelor thesis is nursing care of a patient with hypertrophic obstructive cardiomyopathy after alcohol septal ablation. The first theoretical part of this thesis is focused on the diagnosis of hypertrophic cardiomyopathy specifically its obstructive form, symptomatology, diagnostics and non- pharmacological treatment. The second part presents a case study of a patient after alcohol septal ablation for hypertrophic obstructive cardiomyopathy. The main key issue is nursing care in the post- interventional period. This has to do with post procedural management of reduced self- sufficiency of the patient, the risk of bleeding, infections and arrhythmias as a result of the conductive disorder of the heart. The concluding part of this work is devoted to the long-term monitoring of the quality of life of patient after treatment.
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Non-invasive diagnosis of involvement of the right ventricle in hypertrophic cardiomyopathy
Zemánek, David ; Veselka, Josef (advisor) ; Málek, Ivan (referee) ; Pudil, Radek (referee)
Aim: The ~ulhor invesugatcd thc utility of !traio, ,trajo ratc, and tissue Doppler imagiDg (lDI) forthe evaluation oftbc right vcntticlc (RV) impainnenl io paritOU with a h)'P"nmphic c.rdiomyopathy (HCM) .flt;r ll. IUCOCSIIful alCQhoI ~ptal ablo.tÍOQ wilhout RV hypcrtrOphy in oompari$on wilh C<XI.trolgroup. Mcthodl &lid RCSllII",: A group ol 19 plllÍCOl! sufl"erin, fmm IleM with 22 controls was compaml. The parametcra of TOl M:re evaluated in mitral IIOd lricuspid annulUI. SlrIIm lnd Anno BIC derivW from ml wcre I5Sessed in lUl apH.:al fret:waU ofRV, u wcLl KS in ""!lilI SCgolCflts ofthc len vcntriclc. lktwcen bulh groupS, !bere wcrc statlstically 8ignificant difTerencc~ only III ;,ovolumic pre- ejoction ume (79.2±11.3 ml vs 58.5±8.1 ros, JK{l.OI), iSDVOlulOk ,-e!ll)tllio!1 time (HI4.7±26.2 ms vs n .ll24.5 ms, p<O.OI), m~lalperfOl"TT\3l)(;e(Tci)tndex mcasurcd fmm TOl (O.6I±O.14 Vll 0.49J.0.09, ~.Ol). and early peak diastoli<: veloc:ity of TOl ( 11 .2±1.8cm1I1'112.'»2.6cmll;~.05). CooclU$ion: Tbc: rcsul" IiUg&cJt the impainnent ofboth J)'$lOIi<: and diastolic RV f,metlon in palients rutfering frum HCM. TOI-relaled paramctcrs appcar more Be\lBilivc than ,rmin and I traln Rte for evalUlltion.
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Nursing care for the patient after alcohol septal ablation for hypertrophic obstructive cardiomyopathy
Kovalčíková, Jana ; Zvoníčková, Marie (advisor) ; Zemánek, David (referee)
Cílem mé práce je zpracování případové studie ošetřovatelské péče o pacientku G. E. (56 let), která byla přijata s diagnózou hypertrofické obstrukční kardiomyopatie k provedení alkoholové septální myokardiální ablace. V klinické části popisuji onemocnění - jeho příznaky, diagnostiku, terapii, včetně léčebného výkonu a rehabilitace. Dále se zabývám průběhem hospitalizace (příjem, vyšetření, invazivní výkon, farmakoterapie) paní G. E. V ošetřovatelské části se zabývám ošetřovatelským procesem podle M. Gordonové (anamnéza, aktuální a potenciální diagnózy, plán a realizace ošetřovatelské péče, hodnocení, dlouhodobý plán). K této části jsou připojeny informace o edukaci, psychologická a sociální oblast.
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Influence of CaO Content on Specific LCC, ULCC and NCC Properties
Zemánek, David ; Nevřivová, Lenka
Castables are widely used refractory materials with variable applications. Three types of castables (low cement, ultra-low cement and no cement) were tested to compare their specific properties. Also, corrosion resistance test as an important factor influencing castables design was carried out. Potassium carbonate was used as a corrosive medium using static crucible method. The corrosion mechanisms were evaluated by Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD). The results confirmed that the presence of higher amount of calcium oxide from the Calcium Aluminate Cement (CAC) leads to formation of calcite and anorthite. The corrosion resistance was improved with decreasing or replacing the hydraulic bond.
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Long term outcome of patients after myocardial infarction with bioresorbable vascular scaffold implantation
Kozel, Martin ; Toušek, Petr (advisor) ; Zemánek, David (referee) ; Branny, Marian (referee)
Background: A higher rate of bioresorbable vascular scaffold (BVS) thrombosis has been observed after device implantation compared to implantation of permanent metallic stents in recently published studies. The mechanism of BVS thrombosis is currently under debate. Aim: To assess whether the immune-inflammatory response after BVS implantation is a potential trigger of BVS thrombosis. Methods and results: The PRAGUE-19 study was an academic study that enrolled consecutive patients with ST-segment elevation myocardial infarction (STEMI) with the intention to implant a BVS. A laboratory sub-study included 49 patients with an implanted BVS (of which 38 underwent the complete 2-year follow-up and 44 5-year telephone follow-up) and 52 patients as the control group having an implanted permanent metallic stent (of which 30 underwent the complete 2-year follow-up and 44 5-year telephone follow-up). Samples for inflammatory markers (high sensitivity C-reactive protein [hs-CRP], interleukin-6 [IL-6] and tumor necrosis factor-alpha [TNF-α]) were taken before BVS or stent implantation, on days 1 and 2 after device implantation and at 1 month and 2 years of a clinical control. The primary combined clinical endpoint of the sub-study (death, reinfarction or target vessel revascularization) occurred in 14.29 % of...
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Computed tomography in tissue characterization of the myocardium.
Černý, Vladimír ; Mašek, Martin (advisor) ; Malíková, Hana (referee) ; Zemánek, David (referee)
Introduction: Magnetic resonance (MR) represents still the gold standard in myocardial imaging. There are some studies suggesting that the computed tomography (CT) might be a valid alternative for some patients (especially the ones who are unable to undergo MR). Aims: We had two aims. Aim number 1: To evaluate the ability of CT in the evaluation of delayed contrast enhancement (DCE) in patients with dilated cardiomyopathy. Aim number 2: To assess the possibilities of CT originally performed for a different indication in myocardial tissue characterization. Methods: Part 1: We prospectively enrolled 17 patients with dilated cardiomyopathy. All the patients underwent both cardiac CT and cardiac MR. We compared the findings of DCE on CT with the findings of DCE on MR. Part 2: We retrospectively evaluated 96 patients who underwent both CT for any indication and cardiac MR. We compared the findings of a hypodense area in the myocardium with the findings of DCE on MR. Results: Part 1: CT detected DCE in 3 patients and MR detected DCE in 6 patients. The agreement between both modalities was in v 82% cases (kappa 0.56). The sensitivity and specificity of CT were 50% and 100%, respectively and the positive predictive value was 100%. In patients with positive findings on CT, the localization of DCE was almost...
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Cardiovascular complications in patients with end-stage renal disease.
Valeriánová, Anna ; Malík, Jan (advisor) ; Zemánek, David (referee) ; Piťha, Jan (referee)
Patients with end-stage renal disease frequently suffer from cardiovascular complications. Many factors contribute to their development: hyperkinetic circulation caused by anaemia, fluid retention and by presence of dialysis arteriovenous access; metabolic changes leading to acceleration of atherosclerosis and increase of vascular stiffness and also fluctuation of blood pressure and organ perfusion during haemodialysis, that cause repeated tissue hypoxia. We performed our research on patients in chronic haemodialysis programme. The project studying long-term patency of dialysis access showed that dialysis graft patency is negatively influenced by presence of coronary artery disease and low serum concentrations of cholesterol. In our studies about tissue hypoxia we proved that haemodialysis patients suffer from hypoxia of cerebral tissue and muscle tissue of the dialysis access arm, and that the hypoxia worsens during dialysis. Factors associated with brain hypoxia are presence of heart failure, higher BNP levels and higher erythrocyte distribution width. One of the serious consequences of brain hypoxia is development of cognitive deficit. Among the negative impact of haemodialysis on the heart, we observed left atrial dysfunction, which is a consequence of long-term remodelling and cannot be...
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Structural and hemodynamic characteristics of atherosclerotic plaques in carotid arteries with relation to endovascular manipulation during carotid artery stenting.
Špaček, Miloslav ; Zemánek, David (advisor) ; Malík, Jan (referee) ; Pařenica, Jiří (referee)
Atherosclerotic diseases including stroke are the leading causes of morbidity, mortality as well as disability in industrialized countries. Carotid endarterectomy was long considered the stan- dard approach for the treatment of atherosclerotic carotid disease, one of major causes of stroke. Over time, carotid artery stenting (CAS) has evolved as an alternative approach and is considered equivalent to surgical treatment in selected patients. Particularly in the last years, CAS has gained attention with the increasing knowledge regarding atherosclerotic plaque and cerebrovascular flow. In our study, we focused on patients undergoing CAS and evaluated structural and hemodynamic characteristics of atherosclerotic plaques together with relation to endovascular manipulation. The major part of the study includes transcranial doppler ultrasound evaluation which is able to detect flow in major cerebral arteries as well as to detect microembolizations of atherosclerotic particles during CAS. In eligible patients, we investigated the usefulness of cerebrovascular reserve (CVR) testing to predict severe hemodynamic changes in ipsilateral middle cerebral artery induced by temporary carotid occlusion during proximally protected CAS. CVR was tested by means of a breath-holding test and ophthalmic artery flow...
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