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Bibliographies thématiques / Capillary Fragility

Littérature scientifique sur le sujet « Capillary Fragility »

Auteur : Grafiati

Publié le 27 juillet 2024

Mis à jour le 29 juillet 2024

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Articles de revues sur le sujet "Capillary Fragility"

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Kornerup, Tore. « CAPILLARY FRAGILITY AND DIABETIC RETINOPATHY ». Acta Ophthalmologica 33, n^o 5 (25 juin 2009) : 583–98. http://dx.doi.org/10.1111/j.1755-3768.1955.tb03332.x.

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Forster, PJG, et AD Wright. « Capillary Fragility at High Altitude ». Clinical Science 75, s19 (1 décembre 1988) : 14P. http://dx.doi.org/10.1042/cs075014pc.

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West, John B. « Fragility of pulmonary capillaries ». Journal of Applied Physiology 115, n^o 1 (1 juillet 2013) : 1–15. http://dx.doi.org/10.1152/japplphysiol.00229.2013.

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Although the pulmonary capillaries were discovered in 1661, the ultrastructure of the wall was not elucidated until 60 years ago. Electron micrographs then showed that only 0.2 μm of tissue separated the capillary endothelium from the alveolar space over much of the area. In retrospect this vanishingly small protective layer should have alerted physiologists to the potential fragility of the capillaries, but this was not appreciated until almost 40 years later. This predicament is unique to pulmonary capillaries. No other capillaries in the body are shielded from the outside environment by such a minute amount of tissue. Reasons why the fragility of the capillaries was not recognized earlier include an inappropriate comparison with the properties of systemic capillaries, the mistaken view that the pulmonary capillary pressure is always low, and a misleading use of the Laplace equation. Evidence for the fragility comes from physiological, pathological, and laboratory observations. As expected from evolutionary considerations, the fragility only becomes evident in the normal lung under exceptional conditions. These include elite human athletes at maximal exercise and animals that have developed the capacity for extreme aerobic activity. However, lung and heart diseases frequently cause capillary disruption. Remodeling of pulmonary capillaries occurs in humans in whom the capillary pressure rises over a long period. Neonatal capillaries are extremely fragile, presumably because they have never been exposed to increased transmural pressures. The capillaries conform to the general biological rule that tissue adapts its structure to carry out its required function.

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Hunter, D. J., J. R. Smart et L. Whitton. « Increased capillary fragility at high altitude. » BMJ 292, n^o 6513 (11 janvier 1986) : 98. http://dx.doi.org/10.1136/bmj.292.6513.98.

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Kulkarni, Shradha A., Evan Strobelt et Zaven Sargsyan. « Capillary Fragility in Zika Virus Infection ». American Journal of Medicine 130, n^o 2 (février 2017) : e59. http://dx.doi.org/10.1016/j.amjmed.2016.10.008.

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Feinstein, A. R. « Tourniquet test for capillary fragility in diabetes ». JAMA : The Journal of the American Medical Association 255, n^o 3 (17 janvier 1986) : 323b—323. http://dx.doi.org/10.1001/jama.255.3.323b.

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Feinstein, A. R. « Tourniquet Test for Capillary Fragility in Diabetes ». JAMA : The Journal of the American Medical Association 255, n^o 3 (17 janvier 1986) : 323. http://dx.doi.org/10.1001/jama.1986.03370030041014.

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Wienert, Volker. « Efficacy of aescin on the capillary fragility in men ». International Journal of Angiology 6, n^o 02 (23 avril 2011) : 115–17. http://dx.doi.org/10.1007/bf01616680.

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Wiwanikit, Viroj. « Capillary Fragility, Zika Virus Infection, and Basic Screening Test ». American Journal of Medicine 130, n^o 6 (juin 2017) : e277. http://dx.doi.org/10.1016/j.amjmed.2017.01.047.

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de Godoy, Lívia Maria Pereira, Ana Carolina Pereira de Godoy, Henrique Jose Pereira de Godoy et Jose Maria Pereira de Godoy. « Control of ochre dermatitis with aminaphtone in an adolescent ». Our Dermatology Online 14, n^o 3 (1 juillet 2023) : 301–3. http://dx.doi.org/10.7241/ourd.20233.15.

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The aim of this manuscript is to report the case of a 22-year-old adolescent who presented with brownish patches on the skin of her lower legs persistent since the age of eleven years. She was treated by a dermatologist since the age of twelve years with a clinical diagnosis of ochre dermatitis confirmed by a biopsy. The patient was treated for two years without a success and was sent to a vascular surgeon at fourteen years of age. The diagnosis was confirmed, and the venous duplex scan discarded the possibility of a macrocirculation abnormality. The patient was treated with aminaphtone with the normalization of the skin for two years, after which the patches returned and were controlled again with the same medication. As ochre dermatitis may be associated with capillary fragility, the use of aminaphtone is a therapeutic option. Key words: Ochre Dermatitis; Hyperpigmentation; Capillary Fragility; Aminaphtone; Adolescent

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Chapitres de livres sur le sujet "Capillary Fragility"

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Theisler, Charles. « Capillary Fragility ». Dans Adjuvant Medical Care, 54–55. New York : CRC Press, 2022. http://dx.doi.org/10.1201/b22898-63.

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Actes de conférences sur le sujet "Capillary Fragility"

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Alves, Mônica de Almeida Lima, Anielle Chaves de Araújo Brandão, Lirian Maciel Lima, João Victor Teotônio Rocha, Ana Luíza Dias Arruda da Silva Sousa, Elysa Stephannya Dobrões Vilhena, Ana Luisa Idelfonso Dantas, Domennica Gomes Pecorelli, Ana Carla de Arruda Pessoa et Saraghina Maria Donato da Cunha. « Screening for anemia in childhood : A theoretical-practical relationship between medical semiology and university extension action ». Dans III SEVEN INTERNATIONAL MULTIDISCIPLINARY CONGRESS. Seven Congress, 2023. http://dx.doi.org/10.56238/seveniiimulti2023-199.

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Iron deficiency anemia is the most common form of anemia in childhood and is due to a deficiency of iron in the body. The symptoms of this type of anemia in children can range from pallor of the skin and mucous membranes to delayed cognitive and physical development. The practice of medical semiology plays a crucial role in the screening and diagnosis of anemia in childhood, involving the careful analysis of the signs and symptoms presented by the patient, the taking of a complete medical history and a thorough physical examination. The aim of this study is to present the experience of university extension in applying medical semiology to screening for anemia in children enrolled in a nursery school in the municipality of Cabedelo-PB. The study is an experience report carried out between April and June 2022 with medical students. Given the perception of the high prevalence of iron deficiency anemia in children, an extension project was designed to screen for this pathology and refer children in need of a confirmatory diagnosis to health units for blood tests. The students taking part in the extension applied their theoretical knowledge of medical semiology, with the help of a hematologist lecturer, assessing skin and mucous membrane pallor, heart rate and capillary fragility. It was noticeable that the theoretical-practical relationship played a fundamental role in medical training, enabling the integration of knowledge, the development of clinical skills, a basis for decision-making and better quality of care for the community. Thus, university extension provides the opportunity to get involved in practical activities and services to the community, providing experience in real contexts, teamwork skills, developing communication skills and empathy, broadening the view of health and its determinants, as well as strengthening the sense of social responsibility.

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Borquist, E., A. Baniya, S. Thapa, D. Wood et L. Weiss. « A Copper Microchannel Heat Exchanger for MEMS-Based Waste Heat Thermal Scavenging ». Dans ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38801.

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The growing necessity for increased efficiency and sustainability in energy systems such as MEMS devices has driven research in waste heat scavenging. This approach uses thermal energy, which is typically rejected to the surrounding environment, transferred to a secondary device to produce useful power output. This paper investigates a MEMS-based micro-channel heat exchanger (MHE) designed to operate as part of a micro-scale thermal energy scavenging system. Fabrication and operation of the MHE is presented. MHE operation relies on capillary action which drives working fluid from surrounding reservoirs via micro-channels above a heated surface. Energy absorption by the MHE is increased through the use of a working fluid which undergoes phase change as a result of thermal input. In a real-world implementation, the efficiency at which the MHE operates contributes to the thermal efficiency of connected small-scale devices, such as those powered by thermoelectrics which require continual heat transfer. This full system can then more efficiently power MEMS-based sensors or other devices in diverse applications. In this work, the MHE and micro-channels are fabricated entirely of copper with 300μm width channels. Copper electro-deposition onto a copper substrate provides enhanced thermal conductivity when compared to other materials such as silicon or aluminum. The deposition process also increases the surface area of the channels due to porosity. Fabrication with copper produces a robust device, which is not limited to environments where fragility is a concern. The MHE operation has been designed for widespread use in varied environments. The exchanger working fluid is also non-specific, allowing for fluid flexibility for a range of temperatures, depending on the thermal source potential. In these tests, the exchanger shows approximately 8.7 kW/m2 of thermal absorption and 7.6 kW/m2 of thermal transfer for a dry MHE while the wetted MHE had an energy throughput of 8.3 kW/m2. The temperature gradient maintained across the MHE bottom plate and lid is approximately 30 °C for both the dry and wetted MHE tests though overall temperatures were lower for the wetted MHE.

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