Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Bronchi"”.
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Factors influencing the responsiveness of human bronchi
… is to contract, regulating the airway tone and bronchial narrowing. Research extending over a number of decades has identified many of the major factors contributing to the degree of bronchial contraction at a cellular level including receptor mediated activation of airway smooth muscle by …
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Design of a Novel Video-Assisted Tube Over Tube Rigid Bronchoscope for the Removal of Foreign Bodies from the Bronchi Following Aspiration
… but in most cases, the FB is found in the right bronchial tree. FBA symptoms are often misdiagnosed, resulting in late discovery of the obstruction. There is an increase in difficulty to remove a FB, dependent on how long it remains within the airway. This poses a greater risk to the patient, …
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Influenza A Virus Induced Programmed Cell Death
… the conducting airways, primarily those of the bronchi and bronchioles. Alveolar unit cells, or pneumocytes, chiefly comprise type I and type II alveolar epithelial cells, and are involved in gas exchange and surfactant production. Cells of the bronchi and bronchioles (e.g., basal, secretory, …
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A Combined In Vivo and In Vitro Approach to the Study of Endotoxemia in Swine
… To investigate the role of airway smooth muscle, bronchial rings were isolated and exposed to contractile agents in tissue baths. A hyperresponsiveness of the third generation bronchi to substance P, carbachol, bradykinin and electric field stimulation was observed. However the increase in …
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An investigation of the influence of radiographic malpositioning and image processing algorithm selection on ICU/CCU chest radiographs
… sharp reproduction of the trachea and proximal bronchi, which was significantly better using the standard algorithm compared to the inverted algorithm. The two methods used to estimate the degree of angulation and the apparent position of the CVC/ETT on 17 mobile chest radiographs provide …
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An investigation of the influence of radiographic malpositioning and image processing algorithm selection on ICU/CCU chest radiographs
… sharp reproduction of the trachea and proximal bronchi, which was significantly better using the standard algorithm compared to the inverted algorithm. The two methods used to estimate the degree of angulation and the apparent position of the CVC/ETT on 17 mobile chest radiographs provide …
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VALUTAZIONE DI UNA NUOVA TECNICA CHIRURGICA PER LA CORREZIONE IN UTERO DELL'ERNIA DIAFRAMMATICA IN UN MODELLO ANIMALE: RISULTATI PRELIMINARI.
… of the anatomy of the trachea and main bronchi. On the basis of the anatomical records will be developed some devices for its endoluminal obstruction. After that, will be performed the study of the endoscopical anatomy of the lower respiratory tract of the lamb to identify landmarks …
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Pathogenic effects of Mycoplasma hyopneumoniae on porcine tracheal organ cultures and neutrophils in vitro, and porcine respiratory goblet cells in vivo
… of epithelial cells of pigs was studied. Bronchial goblet cell sulphomucin and sialomucin were quantitated by image analysis of lung sections stained with high iron diamine/Alcian blue. Goblet cells in bronchi of infected pigs contained significantly less total mucin and sialomucin, and …
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Computational and experimental time domain, one dimensional models of air wave propagation in human airways
… to time. However, the complexity of the bronchial tree makes 3-D simulations too expensive computationally, limiting the analysis to few generations. 1-D modelling in space-time variables has been extensively applied to simulate blood pressure and flow waveforms in arteries, providing a …
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Local Control of Blood Flow in the Bronchial Circulation of Dogs
The bronchial circulation supplies nutritive flow to the conducting airways.I studied the local control of blood flow in the bronchial circulation of dogs. The three aims of my study of the bronchial circulation were to determine: 1) distribution of blood flow from the right bronchial artery: 2) …
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Electromagnetic tracking and steering for catheter navigation
… is difficult due to physical dimensions of the bronchi and current methods have low successes rates for accurate diagnosis. Firstly, the potential use of DC magnetic fields for the actuation of catheter devices with permanently magnetised distal attachments is investigated. Catheter models …
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New aspects of tissue mast cells in inflammatory airway diseases
… with mild asthma or rhinitis with or without bronchial hyperreactivity. In patients with uncontrolled asthma despite treatment with inhaled corticosteroids, an increase of MCTC was found in the bronchi and alveolar parenchyma. In mild and uncontrolled asthma a significant increase of the …
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Mechanisms of virus infection of human airway epithelium cultured at an air-liquid interface (HAE-ALI)
… Primary epithelial cells isolated from tracheobronchial airways, grown in transwell at an air-liquid interface (ALI), undergo media-induced mucociliary differentiation. This process reproduces a bronchi tissue-like structure, resembling the morphology and physiology of human airways. HAE-ALI is …
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Effects of Radiation Exposure on Lung Carcinogenesis
… in their regenerative capacity. Normal human bronchial epithelial cells (HBECs), immortalized through the expression of Cdk4 and hTERT, provide a sustainable cell reagent for the evaluation of the radiation effects in vitro. These HBECs retain a novel multipotent capacity in vitro (capable of …
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Impact of mechanical signals on human foetal lung cell differentiation
… in the trachea and smooth muscle in the bronchi, versus elastic fibres in the alveoli. Considering this, as well as the clinical relevance of stiffness in lung diseases, I hypothesised that tissue stiffness can play a role in defining cellular fate. I measured the stiffness of human …
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Understanding the Collective Dynamics of Motile Cilia in Human Airways
… particles by constantly evacuating from lungs, bronchi, and trachea a barrier of mucus. The question of how motile cilia interact with one another to beat in a coordinated fashion is an open and pressing one, with immediate implications for the medical community. In order for the fluid …