Search for dissertations about: "valve resistance"
Showing result 1 - 5 of 18 swedish dissertations containing the words valve resistance.
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1. Valve-less diffuser micropumps
Abstract : Today there is growing interest in research on microfluidicsystems, e.g., for chemical analysis systems and microdosagesystems. One of the basic components in microfluidic systems ismicropumps. READ MORE
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2. Aortic valve surgery: Clinical studies after autograft, homograft and prosthetic valve replacement
Abstract : Aortic Valve Surgery Clinical studies after autograft, homograft and prosthetic valve replacement Obaid Aljassim, MD Department of Cardiovascular Surgery and Anaesthesia, Sahlgrenska University Hospital and University of Gothenburg Introduction and Aims: Aortic valve disease in symptomatic adult patients often requires surgery. Several alternatives are available: repair, mechanical and biological prostheses, homograft and the Ross procedure. READ MORE
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3. Protective Tribofilms on Combustion Engine Valves
Abstract : Inside the complex machinery of modern heavy-duty engines, the sealing surfaces of the valve and valve seat insert have to endure. Right next to the combustion, temperatures are high and high pressure deforms the components, causing a small relative motion in the interface. READ MORE
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4. Molecular epidemiology of coagulase-negative staphylococci in hospitals and in the community
Abstract : Background Coagulase-negative staphylococci (CoNS) and in particular Staphylococcus epidermidis have emerged as major pathogens primarily causing nosocomial infections in patients with indwelling medical devices. These infections are often caused by multidrug-resistant strains of S. epidermidis (MDRSE). READ MORE
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5. Noninvasive haemodynamic evaluation of aortic valve prostheses : Doppler echocardiographic studies at rest and during exercise
Abstract : The present series of investigations was designed to supply information on in vivo pressure-flow relationships and to analyse the incidence of regurgitation in different heart valve prostheses in the aortic position. Patients and methods: The study population comprised 185 patients with mechanical Björk-Shiley Monostrut prostheses, 54 patients with Biocor stented porcine bioprostheses, 50 patients with extended Biocor stentless bioprostheses and 59 patients with cryopreserved aortic homografts. READ MORE