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 20 of 26 for “"stylet"”.
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Characterization of a pre-curved stylet distal tip manipulation mechanism for use in volume targeting
… thesis. The concept of deploying a pre-curved stylet from a concentric stiff cannula that is capable of both translational and rotational motions allows the device to achieve targeting of volumes through a single needle insertion into a soft medium. Each mechanism component was analyzed for its …
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Comparison of a novel low-cost hyperangulated video intubation stylet with the Bonfils fiberscope: a simulated difficult airway manikin study.
Introduction Optic stylets are safe, efficient airway tools, with improved intubation success rates compared to direct laryngoscopy. Economic constraints often limit access to costly difficult airway equipment. The Hyperangulated Video Intubation Stylet (HiVIS) is a novel, low-cost, stainless-steel …
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Dining in the Dark ATP Sensing in the Female Aedes Aegypti Mosquito
… the skin to feed on blood. Probing uses the stylet, a sharp appendage ensheathed in the mosquito labium that punctures the skin and is highly specialized for blood ingestion. Previous work from the lab with GCaMP calcium imaging of stylet neurons showed that approximately 50% of stylet …
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Characterization of a pre-curved needle for use in distal tip manipulation mechanism
… the concept of deploying a flexible pre-curved stylet from a concentric straight cannula. Analytical models were developed to (1) understand what material properties are required to recover from the imposed strains, (2) compare stylet stiffness relative to each other and the cannulas, and (3) …
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Evaluating Application Timing Strategies, Suitability, and Efficacy of Apple Blossom Thinning Chemicals for Commercial Use
… 1) evaluate timing strategies for lime sulfur + stylet-oil blossom thinning sprays and 2) screen chemical agents for their suitability and efficacy as blossom thinners. In the first study, two 'Gala'/'M.9' blocks in different states (North Carolina and Virginia) were utilized in 2019 to compare …
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Isolation and characterization of the female sex pheromone of the sugar beet cyst nematode, heterodera schachtii, and an analysis of male precopulatory behaviour /
… sex pheromone. Male H. schachtii exhibited stylet thrusting, a poorly understood behaviour of the male, upon exposure to the female sex pheromone. This behaviour appeared to be associated with mate-finding and was used as a novel indicator of biological activity in bioassays. Serotonin, …
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Evaluation of external ventricular drain complications and the use of a procedure-targeted image-guidance system
… system for use with ventriculostomy - the Smart Stylet. To address these goals, an Institutional Review Board-approved retrospective cross-sectional study was conducted at the Brigham and Women's Hospital (BWH) to characterize the practice of external ventricular drain placements using data from …
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Morphological characterization of the tobacco cyst nematode complex, Globodera tabacum sspp. tabacum, virginiae, and solanacearum (Nemata: Heteroderinae)
… region including head shape, lip pattern, stylet morphology, and the tail region including tail shape in J2 and spicules in males. The head region of J2 was set off from the body and consisted of three head annules, six lips, and an oral disk. The shape of the head seen in lateral view …
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The Taste of Blood
… the syringe-like blood-feeding appendage, the stylet, and discovered a population of sexually dimorphic chemosensory neurons that are the first neurons to contact blood as a mosquito bites her victim. Using pan-neuronal GCaMP calcium imaging, we found that stylet neurons robustly respond to …
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Drive train improvements and performance evaluation of a robotically steered needle
… substantially straightening a pre-curved Nitinol stylet by retracting it into a concentric outer cannula, and re-deploying it at a different position. A drive mechanism was previously designed to actuate the cannula and stylet motions. While successfully demonstrating the concept, the previous …
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AN ANALYSIS OF THE BUCKLING BEHAVIOR OF SPINAL ANESTHESIA NEEDLES
… depth (i.e. patient size) and the use of a stylet. A repeatable spinal anesthesia procedure and buckling complication was simulated using a custom test fixture designed to match the boundary conditions of needle insertion as performed by an anesthesiologist and a uniaxial servohydraulic …
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Image-guided robots for dot-matrix tumor ablation
… substantially straightening a pre-curved Nitinol stylet by retracting it into a concentric outer cannula, and re-deploying it at different axial and rotational cannula positions. The proximal end of the cannula is attached to the distal end of a screw-spline that enables it to be translated and …
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Dynamics of the sweetpotato potyvirus aphid pathosystem in Louisiana
… to determine the effects of virus infection on stylet penetration behaviors of aphids. SPFMV was transmitted at a greater rate from morning glories which also had greater virus titers compared with sweetpotato and from mixed infection sources than from singly infected sources, and Aphis gossypii …
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Automatic Esophageal Intubation Detection Using Giant Magneto Resistance Sensors
… magneto recitative sensor to and a magnetized stylet to automatically measure the position of an ET tube in a person's throat. This method is less subjective than currently used methods such as end tidal CO2, as it does not rely on user interpretation of data or physiological state of the …
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A novel surgical tool for stimulation paddle delivery to the dorsal root ganglion of the spine
… paddle into the intervertebral foramen via a stylet-retractor mechanism. The tool has a footprint 50% smaller than the available space through which to traverse to access the DRG and can overcome the estimated 1.7 lb force of the surrounding ligaments. The device obtained positive feedback …
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Characterization of 16B09 and 2D01 effector proteins in cyst nematodes
Cyst nematodes use stylet-secreted effector proteins to modify a selected host cell into an elaborate feeding cell. The function of the novel effector proteins 16B09 and 2D01 from the soybean cyst nematode (SCN) Heterodera glycines and sugar beet cyst nematode (BCN) H. schachtii was studied. This …
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Molecular characterization of CLE peptide mimicry during cyst nematode pathogenesis
… into the host root through the nematode stylet. Several effector proteins from cyst nematodes have been identified as CLAVATA3 (CLV3)/ESR (CLE)-like proteins. Due to the different roles plant CLE peptides play in promoting differentiation, we hypothesize that nematode CLEs mimic plant …
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Effects of Horticultural Oils on Photosynthesis, Fruit Maturity, and Yield of Wine Grapes
… and Cabernet Sauvignon were treated with JMS Stylet oil (1.5%) using 5600 L/ha or 1870 L/ha applied to the whole canopy or 930 L/ha applied to the fruit zone. The NAR of 5600 L/ha treated Cabernet Sauvignon was significantly lower than the NAR of control and other oil treatments on three …
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Epidemiology, Aphid Vectors, Impact and Management of Tobacco Etch Potyvirus in Hot Peppers in Jamaica
… rather than after the start of fruit set. Stylet oil and reflective mulch used together delayed the incidence of TEV in pepper plots for over two months. TEV management programs should aim to delay the virus from infecting peppers during the first two months after transplanting. A risk …
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Understanding the impact of Russian wheat aphid-associated microbes on plants
… proteins are introduced into the plant via the stylet, where they interact with plant cells, leading to SA upregulation and JA suppression. Collectively, this dissertation advances our understanding of plant-aphid-microbe interactions, identifying bacterial contributions to aphid aggressiveness …
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