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Letteratura scientifica selezionata sul tema "Trachea"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 1 agosto 2024

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Articoli di riviste sul tema "Trachea"

Inozemtsev, E. O., I. S. Kurganskiy, S. A. Lepekhova, O. A. Goldberg e E. G. Grigoriev. "Method of Formation of Tracheo-Tracheal Anastomosis with a Continuous Single-Row Suture in the Experiment". Acta Biomedica Scientifica 3, n. 6 (5 gennaio 2019): 144–49. http://dx.doi.org/10.29413/abs.2018-3.6.21.

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The work is devoted toanew suture in the formation of tracheo-tracheal anastomosis. Despite the improvement of surgical technique in tracheal interventions, the number of postoperative complications (insufficiency and stenosis of anastomosis) remains high, with postoperative lethality reaching 18.2 %. The main problem is the lack of a unified point of view on the choice of the method of anastomosis, in particular, inclusion in the mucosal suture. Several variants of tracheo-tracheal anastomosis are suggested, but a large number of complications testify to the shortcomings of the methods used.The aim of this work is to optimize the imposition of a continuous single-row suture for the formation of tracheo-tracheal anastomosis with a shortening of the trachea.Materials and methods. The study was carried out on the basis of the scientific department of experimental surgery with the vivarium of Irkutsk Scientific Centre of Surgery and Traumatology using Wistar rats, and approved by the ethical committee.Results. A technique for the formation of tracheo-tracheal anastomosis with the use of an original continuous singlerow suture with a shortening of the trachea was developed. Step by step a sequence of operations from access to the cervical trachea to the formation of an anastomosis.Conclusion. The discussed version of the seam in the formation of tracheo-tracheal anastomosis makes it possible to accurately compare and reliably stabilize the sewn ends of the trachea.

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Zimmermann, Jeannette, Anna Brunner, Julius Underberg e Simona Vincenti. "CT measurements of tracheal diameter and length in normocephalic cats". Journal of Feline Medicine and Surgery 25, n. 3 (marzo 2023): 1098612X2311585. http://dx.doi.org/10.1177/1098612x231158578.

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Objectives The aim of this study was to measure the tracheal dimensions of normocephalic cats using CT. Methods CT images of 15 client-owned normocephalic cats were retrospectively evaluated to measure the length of the feline trachea. Transverse and vertical inner diameters were measured in five different tracheal regions, and the cross-sectional area of the tracheal lumen was calculated for each point of measurement. Descriptive statistics were applied using a two-tailed t-test. Results The mean ± SD length of the trachea was 125.13 ± 14.41 mm. Male cats had significantly larger tracheas than female cats. The transverse diameter first increased by 0.94 mm between the most cranial point of measurement and the middle of the trachea. It then decreased by 1.38 mm between the middle of the trachea and the most caudal point of measurement. The vertical diameter decreased by 1.16 mm between the first point of measurement and the penultimate point, and then increased by 0.06 mm between the penultimate point of measurement and the end of the trachea. The two different diameters resulted in an elliptical trachea shape. Conclusions and relevance The feline trachea was circular only at its cranial and caudal ends, and elliptical with a dorsoventral flattening along the rest of its length. Vertical and transverse diameters varied along the entire length. Tracheal shape differences should be considered when performing permanent tracheostomy, tracheal anastomosis or stenting in cats.

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Darr, A., S. Mohamed, D. Eaton e MS Kalkat. "Tracheo-oesophageal fistula in a patient with chronic sarcoidosis". Annals of The Royal College of Surgeons of England 97, n. 7 (1 ottobre 2015): e100-e102. http://dx.doi.org/10.1308/003588415x14181254790446.

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Sarcoidosis is a common multisystem granulomatous condition of unknown aetiology, predominantly involving the respiratory system. Tracheal stenosis has been described but we believe that we present the first case of a tracheo-oesophageal fistula secondary to chronic sarcoidosis. A 57-year-old woman with sarcoidosis, a known tracheal stricture and a Polyflex® stent in situ presented with stridor. Bronchoscopy confirmed in-stent stenosis, by exuberant granulation tissue. The stent was removed and the granulation tissue was resected accordingly. Postoperatively, the patient was noticed to have an incessant cough and video fluoroscopy raised the suspicion of a tracheo-oesophageal fistula. A repeat bronchoscopy demonstrated marked granulation tissue, accompanied by a fistulous connection with the oesophagus at the mid-lower [middle of the lower] third of the trachea. Three Polyflex® stents were sited across the entire length of the trachea. Sarcoidosis presents with varying clinical manifestations and disease progression. Tracheal involvement appears to be a rare phenomenon and usually results in stenosis. To date, there has been little or no documented literature describing the formation of a tracheo-oesophageal fistula resulting from sarcoidosis. Early reports documented the presence of sarcoidosis induced weakening in the tracheal wall, a process termed tracheal dystonia. Weaknesses are more apparent in the membranous aspect of the trachea. Despite the rare nature of such pathology, this case report highlights the need to consider the presence of a tracheo-oesophageal fistula in sarcoidosis patients presenting with repeat aspiration in the absence of an alternate pathology.

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Lim, S., J. Jeong, HG Heng, S. Sung, Y. Choi, H. Oh, K. Kim, Y. Cho, Y. Jung e K. Lee. "Computed tomographic features of tracheal shapes and dimensions in awake dogs". Veterinární Medicína 63, No. 3 (28 marzo 2018): 131–36. http://dx.doi.org/10.17221/124/2017-vetmed.

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There are several reports in the veterinary literature on tracheal assessment; however, there is a lack of studies on the trachea in voluntarily breathing dogs. The aim of this study was to describe the natural shape of the trachea in awake dogs and to assess tracheal dimensions and the width-to-height ratio. Thoracic computed tomographic images of awake small breed dogs without any signs of respiratory malfunction (n = 19) were evaluated. Each trachea was categorised into one of four different shapes: circular, horseshoe, crescent or focal dorsal invagination. The circular shape was prominent, particularly in the thoracic inlet and intrathoracic area, while the horseshoe shape was also normally present. In this group of normal dogs, there were no crescent-shaped tracheas, but focally invaginated tracheas were observed. The mean tracheal heights at five locations, namely the caudal endplate of the fourth cervical vertebra, cranial endplate of the seventh cervical vertebra, mid-body of the first thoracic vertebra, mid-body of the third thoracic vertebra, and 1 cm cranial to the carina were 9.12, 8.96, 9.34, 9.88 and 10.16 mm, respectively. The widths at these same sites were 12.26, 10.42, 10.07, 9.82 and 10.23 mm, respectively. The width-to-height ratios of each tracheal location were 1.38, 1.20, 1.10, 1.01 and 1.03, the last two of which are consistent with the circular shape of the intrathoracic trachea. Multi-detector computed tomography under non-general anaesthesia is a non-invasive and unparalleled imaging tool for describing tracheal appearance in healthy awake dogs.

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Byanet, O., J. A. Bosha e B. O. Onoja. "A Quantitative Study on the Trachea of the Red Sokoto (Maradi) Goat (Capra hircus)". Veterinary Medicine International 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/142715.

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The trachea forms the part of the conducting system which transports air from the external environment to the lungs. The aim of this study was to provide quantitative dimensions of the trachea of Red Sokoto goat (Capra hircus). Quantitative analysis was conducted on nine tracheas from goats (ages were ranged between eight months and three years) without sex variation in this study. The results showed that tracheas were extended from the cricoid cartilage of larynx to the hilus of the lungs, where they were divided into the right and left bronchi. They were structurally composed of the cartilaginous rings that were incomplete dorsally but bridged by tracheal muscles at the ends of the tracheal cartilages. The mean length of the trachea from the first to the last ring was 257 ± 7.11 mm and the number of tracheal rings varied from 35 to 57, with a mean value of 49.33 ± 2.78. The left bronchial mean length (19.78 ± 2.66 mm) was significantly longer than the right (10.44 ± 1.79 mm). The cross-sectional area (CSA) was wider at the intrathoracic area (221.5 ± 0.2 mm2) than cervical area (176 ± 0.1 mm2).

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Bottasso-Arias, Natalia, Lauren Leesman, Kaulini Burra, John Snowball, Ronak Shah, Megha Mohanakrishnan, Yan Xu e Debora Sinner. "BMP4 and Wnt signaling interact to promote mouse tracheal mesenchyme morphogenesis". American Journal of Physiology-Lung Cellular and Molecular Physiology 322, n. 2 (1 febbraio 2022): L224—L242. http://dx.doi.org/10.1152/ajplung.00255.2021.

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Tracheobronchomalacia and complete tracheal rings are congenital malformations of the trachea associated with morbidity and mortality for which the etiology remains poorly understood. Epithelial expression of Wls (a cargo receptor mediating Wnt ligand secretion) by tracheal cells is essential for patterning the embryonic mouse trachea’s cartilage and muscle. RNA sequencing indicated that Wls differentially modulated the expression of BMP signaling molecules. We tested whether BMP signaling, induced by epithelial Wnt ligands, mediates cartilage formation. Deletion of Bmp4 from respiratory tract mesenchyme impaired tracheal cartilage formation that was replaced by ectopic smooth muscle, recapitulating the phenotype observed after epithelial deletion of Wls in the embryonic trachea. Ectopic muscle was caused in part by anomalous differentiation and proliferation of smooth muscle progenitors rather than tracheal cartilage progenitors. Mesenchymal deletion of Bmp4 impaired expression of Wnt/β-catenin target genes, including targets of WNT signaling: Notum and Axin2. In vitro, recombinant (r)BMP4 rescued the expression of Notum in Bmp4-deficient tracheal mesenchymal cells and induced Notum promoter activity via SMAD1/5. RNA sequencing of Bmp4-deficient tracheas identified genes essential for chondrogenesis and muscle development coregulated by BMP and WNT signaling. During tracheal morphogenesis, WNT signaling induces Bmp4 in mesenchymal progenitors to promote cartilage differentiation and restrict trachealis muscle. In turn, Bmp4 differentially regulates the expression of Wnt/β-catenin targets to attenuate mesenchymal WNT signaling and to further support chondrogenesis.

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Kao, James, Christopher N. Fortner, Lynne H. Liu, Gary E. Shull e Richard J. Paul. "Ablation of the SERCA3 gene alters epithelium-dependent relaxation in mouse tracheal smooth muscle". American Journal of Physiology-Lung Cellular and Molecular Physiology 277, n. 2 (1 agosto 1999): L264—L270. http://dx.doi.org/10.1152/ajplung.1999.277.2.l264.

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Sarcoplasmic/endoplasmic reticulum Ca2+-ATPase 3 (SERCA3), an isoform of the intracellular Ca2+ pump that has been shown to mediate endothelium-dependent relaxation of vascular smooth muscle, is also expressed in tracheal epithelium. To determine its possible role in regulation of airway mechanical function, we compared tracheal contractility in gene-targeted mice deficient in SERCA3 (SERCA3−) with that in wild-type tracheae. Cumulative addition of ACh elicited concentration-dependent increases in isometric force (ED50 = 2 μM, maximum force = 8 mN/mm2) that were identical in SERCA3− and wild-type tracheae. After ACh stimulation, substance P (SP) elicited a transient relaxation (42.6 ± 3.2%, n = 28) in both tracheae. However, the rate of relaxation was significantly ( P < 0.04, n = 9) more rapid in the wild-type [half-time ( t ½) = 34.3 s] than in the SERCA3−( t ½ = 61.6 s) trachea. The SP relaxation was reduced by rubbing the trachea, indicative of epithelial cell involvement. This was verified using a perfused trachea preparation. SP in the outside medium had no effect, whereas SP in the perfusate bathing the epithelial side elicited a relaxation. Nitric oxide synthase inhibition (0.2 mM N ω-nitro-l-arginine) reduced the SP relaxation by 36.5 ± 12.5%, whereas the SP effect was abolished by eicosanoid inhibition (10 μM indomethacin). ATP also elicited an epithelium-dependent relaxation similar to SP but with a more rapid relaxation in the SERCA3−trachea than in the wild-type trachea. Our results indicate that SERCA3 gene ablation does not directly affect smooth muscle, which is consistent with the distribution of the isoform, but suggest that SERCA3 plays a role in epithelial cell modulation of airway smooth muscle function.

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Linkov, Gary, Arash Hanifi, Farzad Yousefi, Derrick Tint, Sudheer Bolla, Nathanial Marchetti, Ahmed M. S. Soliman e Nancy Pleshko. "Compositional Assessment of Human Tracheal Cartilage by Infrared Spectroscopy". Otolaryngology–Head and Neck Surgery 158, n. 4 (16 gennaio 2018): 688–94. http://dx.doi.org/10.1177/0194599817752310.

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Objectives To assess the potential of infrared fiber-optic spectroscopy to evaluate the compositional properties of human tracheal cartilage. Study Design Laboratory-based study. Methods Twenty human cadaveric distal tracheas were harvested (age range 20-78 years; 6 females, 14 males) for compositional analysis. Histologic staining, Fourier transform infrared imaging spectroscopy data on collagen and proteoglycan (PG) content, and near-infrared (NIR) fiber-optic probe spectroscopic data that reflect protein and water content were evaluated. NIR fiber-optic probe data were also obtained from the proximal trachea in 4 human cadavers (age range 51-65 years; 2 females, 2 males) in situ for comparison to distal trachea spectral data. Results In the distal trachea cohort, the spectroscopic-determined ratio of PG/amide I, indicative of the relative amount of PG, was significantly higher in the tissues from the younger group compared to the older group (0.37 ± 0.08 vs 0.32 ± 0.05, P = .05). A principal component analysis of the NIR spectral data enabled separation of spectra based on tracheal location, likely due to differences in both protein and water content. The NIR-determined water content based on the 5200-cm−1 peak was significantly higher in the distal trachea compared to the proximal trachea ( P < .001). Conclusions Establishment of normative compositional values and further elucidating differences between the segments of trachea will enable more directed research toward appropriate compositional end points in regenerative medicine for tracheal repair.

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Sotres-Vega, Avelina, Jaime Villalba-Caloca, Farid Ramirez-Zamora, Diana Pérez-Covarrubias e J. Alfredo Santibáñez-Salgado. "Cryopreserved tracheal segments: a new tool for bench surgical training in thoracic surgery". Acta Cirurgica Brasileira 27, n. 8 (agosto 2012): 585–88. http://dx.doi.org/10.1590/s0102-86502012000800012.

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PURPOSE: To present a new low-cost high fidelity bench model of cryopreserved trachea that can be used to learn surgical skills from medical students to cardiothoracic surgery fellows. METHODS: Ten tracheas were harvested from ten non-trachea related research dogs at the moment of euthanasia. Each trachea was trimmed in six or seven rings segments. They were cryopreserved and stored during 60 days. The day programmed for surgical skills practice, they were thawed to room temperature. RESULTS: Forty segments have been used. After defrosting, all the segments kept their normal anatomic shape and structural integrity. Two incisions were made on every tracheal segment and sutured with running or separate stitches with 5-0 polypropilene. There were no complications such as cartilage ruptures, neither tears on the mucosae, the cartilages nor the membranous posterior membrane. CONCLUSIONS: The cryopreserved trachea is a high fidelity, practical, reproducible, portable, low-cost bench model. It allows cardiothoracic fellows to learn how to handle a trachea, as well as to perfect their surgical and suture abilities before applying them on a real patient's trachea.

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Mikheev, Mikheev V., e Sergey N. Trushin. "A clinical case of successful treatment of complete abruption of the trachea from the larynx". I.P. Pavlov Russian Medical Biological Herald 29, n. 1 (15 marzo 2021): 117–24. http://dx.doi.org/10.23888/pavlovj2021291117-124.

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Tracheobronchial injuries as a consequence of chest blunt trauma are rare. Blunt traumas of the cervical part of the trachea are a rarer pathology presenting a serious diagnostic problem for a clinician. Traumas of the larynx and the trachea account for 40 to 80% of lethality. The tracheas cervical part is vulnerable despite that it is covered with the neck muscles, spine, clavicles, and mandible. In cut/stab wounds, the tracheas cervical part is often damaged together with the adjacent structures. In blunt trauma, under a direct action of a traumatizing agent, the mobile trachea displaces toward the spine, accompanied by damage to the tracheal cartilages, its membranous part, and the soft surrounding tissues with preservation of the integrity of the skin. Tracheal ruptures along the distance up to 1 cm from the cricoid cartilage account for not more than 4% of all tracheal ruptures. A complete tracheal rupture and its abruption from the larynx are extremely rare pathology. Because of severe respiratory disorders, most victims die at the site where their injury occurred. This article presents a clinical case of the successful treatment of patient Z., 41 years of age, with complete tracheal abruption from the larynx. The cause of tracheal damage was blunt neck trauma in a traffic accident. A peculiarity of this clinical case was that the victim arrived at a specialized thoracic surgery unit with a functioning tracheostomy two days after the trauma. Conclusion. Tracheal trauma is a potentially fatal condition. Therefore, early diagnosis of tracheobronchial damage is essential since it permits timely surgical intervention and diminished risk of lethal outcome. When dealing with patients with trauma of the head, neck, and chest with non-corresponding clinical data and the absence of effective recommended standard therapeutic measures, a clinician should become alert and exclude the tracheal and bronchial damage. X-ray computed tomography and fibrotracheobronchoscopy are strongly recommended as reliable methods to diagnose tracheobronchial damages. In a surgical intervention, it is necessary to perform the primary suture on the trachea, avoid preventive tracheostomy, and delay interventions associated with poorer prognosis and a high complication rate.

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Tesi sul tema "Trachea"

Lynch, Thomas John. "Adult stem cells in the trachea and tracheal submucosal glands". Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/6464.

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Breathing is essential for human life, yet tens of millions of people in the U.S. alone suffer from lung diseases. With each breath, lungs are exposed to the external environment. Inhaled air first passes through the trachea, bronchi, and finally the bronchioles before it reaches the alveoli where gases are exchanged. A barrier of epithelial cells protects the airways. In addition, epithelial glands also secrete protein-rich fluids onto the airway surfaces to help maintain sterility. Injury, disease, or other factors can damage these cells, and regiospecific stem cells (SCs) can divide to replace them. However, many important details about lung SCs are still unknown. For example, what processes control SC division? How do region-specific SCs differ from one another? And how does disease or injury impact SC biology? We found that some processes that regulate lung development also control adult SC division following injury. We show that SCs from airway glands give rise to surface epithelial cell types and glandular cell types. In contrast, surface SCs only generated surface cell types. Finally, we identify a type of cell in the glands that can regenerate surface cell types after severe injury. These studies provide new insights into the neighborhoods in which SCs reside in the large airways and processes that control their contribution to airway repair following injury. Overall, this research provides important new insights into adult SC biology and conditions affecting lung health.

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Yamashita, Masaru. "Regeneration of the larynx and trachea". Kyoto University, 2007. http://hdl.handle.net/2433/135671.

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Sellitri, Francesco <1968&gt. "Trapianto eterotopico della trachea: studio sperimentale". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/447/1/Tesi_Sellitri_Francesco.pdf.

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Sellitri, Francesco <1968&gt. "Trapianto eterotopico della trachea: studio sperimentale". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/447/.

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Sugano, Yoshimi Teresa. "Bronchoskopische Vermessung und dreidimensionale Darstellung der Trachea". Doctoral thesis, Humboldt-Universität zu Berlin, Medizinische Fakultät - Universitätsklinikum Charité, 2006. http://dx.doi.org/10.18452/15419.

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Im Rahmen der vorliegenden Arbeit ist ein neues bronchoskopisches Verfahren entwickelt und getestet worden, mit dem eine Längs- und Querschnittsvermessung zentraler Atemwegesstenosen in Echtzeit ermöglicht wird und anschließend eine 3D-Rekonstruktion des untersuchten Abschnitts dargestellt werden kann. Für die Querschnittsflächenbestimmung wird durch den Arbeitskanal des Bronchoskops eine Lasersonde eingeführt und ein Laserlichtring auf die Trachealwand projiziert. Die Abbildung des Lichtrings wird im bronchoskopischen Bild noch während der Untersuchung mit Hilfe einer speziell im Rahmen dieser Arbeit entwickelten Software Endo3D segmentiert und vermessen. Durch Speichern aufeinanderfolgender Querschnittsflächen kann ein 3D-Datensatz erstellt, visualisiert und das Volumen berechnet werden. Experimentell wurde die Methode an Kunststoffmodellen mit bekannten Maßen und Präparaten aus Schweineluftröhren getestet. Die Referenzwerte für die Volumen der Schweineluftröhren wurden durch Wasservolumetrie bestimmt. Klinisch wurde die Methode in einer Pilotstudie getestet. Bei 10 Patienten wurden Querschnitte und Volumen unterschiedlich langer Trachealabschnitte vermessen. Als Vergleichsmethode wurde jeweils eine CT durchgeführt. Die Ergebnisse im experimentellen Teil zeigten bei sehr guter Reproduzierbarkeit eine gute Korrelation zwischen den bronchoskopisch gemessenen Werten und den realen bzw. Referenzwerten. Die Korrelation der klinischen Ergebnisse erwies sich als befriedigend ohne Hinweis auf einen systematischen Fehler. Ein kleiner systematischer Messfehler im experimentellen Teil zeigte sich als irrelevant für die Klinik. Die hier vorgestellte Methode ermöglicht untersucherunabhängige Verlaufsbeschreibungen von Stenosen und erlaubt die Schaffung einer einheitlichen Klassifikation. Darüber hinaus ist damit zukünftig eine individualisierten Stentimplantation sowie Tumorvolumenberechnungen denkbar.
In this paper a new bronchoscopic method was developed and tested, that performs measuring both cross-sectional areas and length of central airway stenoses in real-time. Furthemore this method enables to represent a three-dimensional reconstruction of the airway section that was analysed. To measure th cross-section area, a laser probe inserted into the operating channel of a bronchoscope projects a ring of light onto the trachal wall and marks the cross-sectional area. A new software especially developed for this method makes it possible to identify the projected ring of light and measures the cross-sectional area after applying lens distortion correction algorithms. By saving a succession of cross-sections 3D-data is provided for visualizing and volume calculation. The measuring accurracy was first tested employing plastic tubes with known diameters and 17 models of porcine trachea. The cilinical evaluation was realized in a pilot study. Sections of different length of tracheas of 10 patients were analysed by both the new method and by CT. The results of the experimental part showed good correlation between the reference methods and a very good reliability. The correlation between CT and bronchoscopic measuring results was slightly less good than the experimental correlation, but they showed no systematic measuring error. A little systematic error in the experimental evaluation prooved to be irrelevant for clinical results. The new method enabels objective description of stenoses and makes it possible to develop a standardized classification. In future indvidual stent construcions or calculation of tumor volumes are conceivable.

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Okuyama, Hideaki. "Transplantation of multiciliated airway cells derived from human iPS cells using an artificial tracheal patch into rat trachea". Kyoto University, 2020. http://hdl.handle.net/2433/253142.

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Hemphälä, Johanna. "Genetic dissection of tubulogenesis in the Drosophila trachea /". Stockholm : Department of Developmental Biology, Wenner-Gren institute, Stockholm University, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-430.

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Khawaja, Aamir Mahmoud. "Inhibition of neurogenic mucus secretion in ferret trachea". Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286452.

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Sakaguchi, Yasuto. "Development of a novel tissue-engineered nitinol-frame artificial trachea with native-like physical characteristics". Kyoto University, 2018. http://hdl.handle.net/2433/235063.

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Karkhanis, Teja. "Intra-animal and Inter-animal Variations in the Biomechanical Properties of Tracheal Cartilage Rings". University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1448037942.

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Libri sul tema "Trachea"

Grillo, Hermes C. Surgery of the trachea and bronchi. Hamilton, Ont: BC Decker, 2004.

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Grillo, Hermes C. Surgery of the trachea and bronchi. Hamilton, Ont: BC Decker, 2004.

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Peter, Wurnig, a cura di. Trachea and lung surgery in childhood. Berlin: Springer-Verlag, 1987.

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Remacle, Marc. Surgery of Larynx and Trachea. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2010.

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Remacle, Marc, e Hans Edmund Eckel, a cura di. Surgery of Larynx and Trachea. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-79136-2.

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Wurnig, Peter, a cura di. Trachea and Lung Surgery in Childhood. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-71665-2.

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Christine, Gralapp, a cura di. Surgery of the larynx and trachea. Philadelphia: Decker, 1990.

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1923-, Montgomery William W., a cura di. Surgery of the larynx, trachea, esophagus, and neck. Philadelphia: Saunders, 2002.

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Montgomery, William W. Manual for use of Montgomery laryngeal, tracheal, and esophageal prostheses. St. Louis, MO: Annals Publishing Co., 1986.

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Montgomery, William W. Manual for use of Montgomery laryngeal, tracheal, and esophageal prostheses: Update 1990. St. Louis, Mo: Annals Pub. Co., 1990.

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Capitoli di libri sul tema "Trachea"

O’Hara, James E., Igor UsUpensky, N. J. Bostanian, John L. Capinera, Reg Chapman, Carl S. Barfield, Marilyn E. Swisher et al. "Trachea (pl., Tracheae)". In Encyclopedia of Entomology, 3833. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_2497.

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Bährle-Rapp, Marina. "Trachea". In Springer Lexikon Kosmetik und Körperpflege, 561. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_10628.

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Schwarz, Tobias, e Jimmy Saunders. "Trachea". In Veterinary Computed Tomography, 243–48. West Sussex, UK: John Wiley & Sons, Ltd., 2013. http://dx.doi.org/10.1002/9781118785676.ch24.

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Mehlhorn, Heinz. "Trachea". In Encyclopedia of Parasitology, 2785. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-43978-4_4413.

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Mehlhorn, Heinz. "Trachea". In Encyclopedia of Parasitology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-27769-6_4413-1.

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Baiguera, Silvia, e Paolo Macchiarini. "Trachea". In Regenerative Medicine, 691–711. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-9075-1_29.

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Gooch, Jan W. "Trachea". In Encyclopedic Dictionary of Polymers, 929. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_14988.

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Monnet, Eric. "Trachea". In Small Animal Thoracic Surgery, 119–28. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781118943427.ch14.

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Bährle-Rapp, Marina. "Trachea Hydrolysate". In Springer Lexikon Kosmetik und Körperpflege, 561. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_10629.

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Kettner, Frank. "Collapsing Trachea". In Chronic Disease Management for Small Animals, 291–96. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119201076.ch34.

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Atti di convegni sul tema "Trachea"

Karkhanis, Teja, Farhan Zafar, Brian Juarez, David Luis-Simon Morales e Balakrishna Haridas. "Novel Bio-Synthetic Graft for Tracheal Reconstruction in Pediatric Patients With Congenital Tracheal Stenosis: In Vitro Studies of Axial, and Bending Biomechanics". In 2019 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/dmd2019-3226.

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Congenital Tracheal Stenosis (CTS) is a rare birth defect requiring surgical interventions when it affects more than 30% of the trachea. Slide tracheoplasty, the current standard of care, is associated with reinterventions including the need for intraluminal stenting leading to increased airway infections. We propose a novel Bio-Synthetic Graft for long segment tracheal reconstructions in CTS patients. Preliminary bench performance testing, using lamb tracheas, shows that the Bio-Synthetic Graft reconstructed tracheas have comparable radial, axial and bending stiffness in hyperextension to healthy tracheas and resist collapse when subjected to bending in flexion. These results suggest that Bio-Synthetic Graft could be a promising alternative to existing solutions for long segment CTS.

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Shih, Tzu-Ching, Tzyy-Leng Horng e Fong-Lin Chen. "Computational Fluid Dynamics Simulation of Airflow Alteration in the Trachea Before and After Vascular Ring Surgery". In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14360.

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Vascular rings, congenital intracardic anomalies of the aortic arch and the vessels emerging from the heart, completely encircle the trachea and esophagus [1]. The vascular ring results in narrowing and obstruction of the trachea and the esophagus. Due to the existence of a complete or partial vascular ring compressing either the trachea or esophagus, symptoms of a vascular ring in children include cough, stridor, chronic cough, dysphagia, persistent wheeze, and noisy breathing [2]. Some studies reported that the vascular ring surgery provides an excellent chance to improve the patient respiration conditions, especially for relief of symptoms [1–3]. Al-Bassam et al. reported that the thoracoscopic division of vascular rings in infants and children is a safe and effective surgery rather than an open thoracotomy[4]. Even after the treatment of a surgical division of the vascular ring, however, the fixed obstruction is relieved but the patient continues to have dynamic collapse because the compressed trachea segment is always malacic. Airway resistance to flow in the airway, thus, is a key factor for not only clinical diagnosis severity assessment but also therapeutic decision in tracheal stenosis. Furthermore, Malvè et al. (2011) utilized the finite element-based commercial software code (ADINA R&D Inc.) to model the fluid structure interaction of a human trachea under different ventilation conditions [5]. They also found that the positive pressure in the trachea does not result in the airway collapse during the time period of mechanical breathing. Therefore, the purpose of this study is to use the computational fluid dynamics (CFD) technique to calculate the local pressure drops in the tracheal segment for different inspiratory and expiratory flow rates due to preoperative and preoperative vascular ring surgery.

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Gilvaz, V. J., e J. Reed. "The Tricky Trachea". In American Thoracic Society 2020 International Conference, May 15-20, 2020 - Philadelphia, PA. American Thoracic Society, 2020. http://dx.doi.org/10.1164/ajrccm-conference.2020.201.1_meetingabstracts.a1389.

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Islam, Adnan, Amir Rouhollahi, Michael Lauria, Anand Santhanam e Olusegun Ilegbusi. "Modeling Air Flow in Pathological Human Airway With Patient Specific CT-Data". In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-71422.

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Abstract This study investigates the effects of different pathological conditions of human trachea on flow distribution in the tracheo-bronchial tree (TBT) of human airways. Pathological conditions including hereditary Left Pulmonary Artery Sling (LPAS) and Chronic Obstructive Pulmonary Disease (COPD) often cause stenosis in the tracheal airway while a widening of the airway has been reported for patients with pulmonary fibrosis. This study assesses the airflow distribution in the human airway under such pathological conditions relative to normal flow condition, utilizing Computational Fluid Dynamics (CFD). Realistic 3D airway geometry is first reconstructed from anonymized CT scan data of human respiratory system and used for the CFD analysis. Specific pathological conditions are simulated by the modification of the tracheal geometry to account for the consequent shape deviation, and the resulting flow in the central airway is analyzed. Different breathing conditions (rest and mild activity) are modeled by imposing appropriate boundary conditions. The results demonstrate marked dependence of the predicted flow distribution and wall shear stress in the trachea on the pathological conditions. Tracheal stenosis exhibits mass flow split between the right and left bronchi similar to healthy case while bronchial stenosis significantly changes the mass flow split with less air coming out of the left main bronchus compared to the healthy case. The next phase of the study aims to assess the effect of the upstream vessel obstruction on the spatio-temporal airflow distribution in the lung and the overall breathing pattern. Such capabilities will directly address the regional flow distribution associated with diseases such as COPD and LPAS.

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Khudaybergenov, Shukhrat, Otabek Eshonkhodjaev, Georgy Pakhomov, Ortikali Irisov, Rustem Hayaliev, Nasretdin Tursunov, Doniyor Abdullaev e Aziz Khasanov. "Surgery of laryngo-tracheal, multifocal and extensive cicatricial stenosis of trachea". In Annual Congress 2015. European Respiratory Society, 2015. http://dx.doi.org/10.1183/13993003.congress-2015.pa1510.

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Hartert, M., M. Wolf, C. Marko e M. Hürtgen. "Glomangioma of the Lower Trachea". In 27. Jahrestagung der Deutschen Gesellschaft für Thoraxchirurgie. Georg Thieme Verlag KG, 2018. http://dx.doi.org/10.1055/s-0038-1668334.

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Caro Aguilera, Pilar, Yazmina Martínez García, Inmaculada Gómez Garrido, Javier Pérez Frías e Estela Pérez Ruiz. "Trachea stenosis in Keutel syndrome". In ERS International Congress 2020 abstracts. European Respiratory Society, 2020. http://dx.doi.org/10.1183/13993003.congress-2020.3485.

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Patel, K., e P. I. Raju. "Metastatic Melanoma of the Trachea". In American Thoracic Society 2020 International Conference, May 15-20, 2020 - Philadelphia, PA. American Thoracic Society, 2020. http://dx.doi.org/10.1164/ajrccm-conference.2020.201.1_meetingabstracts.a6795.

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Agustin, M., e R. Sales. "Pleomorphic Adenoma of the Trachea". In American Thoracic Society 2023 International Conference, May 19-24, 2023 - Washington, DC. American Thoracic Society, 2023. http://dx.doi.org/10.1164/ajrccm-conference.2023.207.1_meetingabstracts.a2448.

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Taherian, Shahab, Hamid Rahai, Bernardo Z. Gomez, Thomas Waddington e Jeremy R. Bonifacio. "Tracheal Stenosis: A CFD Approach for Evaluation of Drug Delivery". In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-50799.

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The existence of obstructions such as tracheal stenosis has major impacts on respiratory functions. Therapeutic effectiveness of inhaled medications is influenced by tracheal stenosis, and particle transport and deposition pattern are modified. The majority of studies have focused on obstructions in branches of the airways, where the flow is diverted to the other branches to meet the needed oxygen intake. In this study we have investigated the effects of trachea with and without stenosis/obstruction on particle depositions and air flow in a human respiratory system. Patient specific CFD simulations were conducted; CT-scans of a patient with tracheal stenosis were used to create 3D models of bronchial tree up to 8 generations. The section of the stenosis was manually modified to create a healthy trachea. Comparisons between CFD simulations before and after intervention demonstrate the impact of the stenosis on flow characteristics and particles distribution. The numerical investigations were performed using the implicit Unsteady Reynolds-Averaged Navier-Stokes equation (U-RANS), using the commercially available software (STAR-CCM+) from CD-Adapco, along with K-ω; shear stress transport model. Two sets of CT-images of inhalation and exhalation were used for assigning Patient-specific boundary conditions at the outlets. Lagrangian Phase model was used to simulate particle transport and depositions of 10, 5 and 2.5 micron diameter particles. Results of the particle depositions for 10 micron particles highlight the difference in depositions and ultimately inhaled medications in patients with and without tracheal stenosis. Particle deposition for normal Tidal volume increased due to stenosis from 47% to 51% for 10 Micron particles and not a significant change for the 2.5 Micron particles (from 4.5% to 4.7%). Comparisons of pressure drop in each generation between patient with tracheal stenosis and the healthy lung showed significant increase in pressure drop after the stenosis, which were experienced in all generations downstream. Experimental validation of the CFD results were made with a model of healthy trachea up to 3rd generation, manufactured using Additive Layer Manufacturing (ALM) from CT-images and pressure results were compared with the corresponding CFD results. Good agreements were found.

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Rapporti di organizzazioni sul tema "Trachea"

Shah, Jeenam, Jayalakshmi T.K, Bhumika Madhav, Sharad Bhalekar, Dhanaji Rewande e Shantesh Kaushik. Unusual Bronchial Foreign Body with a Bizarre Entry Path. Science Repository, marzo 2024. http://dx.doi.org/10.31487/j.jscr.2024.01.05.

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Foreign body in the bronchus is usually aspirated, ingested or deposited. Entry of a bronchial foreign body through the neck via a rent in the trachea is rare. A freak accident occurred when our 58 year old patient was overseeing crane operation at 4- a steel plant and a metallic foreign body pierced the patient’s trachea and was lodged in his right bronchus intermedius. Metallic body was removed using a snare via a flexible bronchoscope. A morbid open thoracic surgery was avoided by a timely procedure. Our case highlights that foreign body in the lungs can also enter via open penetrating wounds in the neck or chest and can be removed by bronchoscopy avoiding complex surgical procedures.

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Gerde, P., B. A. Muggenburg e J. R. Thornton-Manning. Experimental validation of a model for diffusion-controlled absorption of organic compounds in the trachea. Office of Scientific and Technical Information (OSTI), dicembre 1995. http://dx.doi.org/10.2172/381358.

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Ma, Ning, Bei Pan e Kehu Yang. Efficacy and safety of Tanreqing injection for cough caused by acute trachea‐bronchitis disease: A systematic review and meta-analysis of randomized controlled trials. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, febbraio 2023. http://dx.doi.org/10.37766/inplasy2023.2.0090.

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Lin, Hongwei, Yanjun Gao, Kang Sun e Faguang Jin. Association between PM2.5 pollution and outpatient visits for respiratory diseases in China: a systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, maggio 2022. http://dx.doi.org/10.37766/inplasy2022.5.0144.

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Review question / Objective: Previous epidemiological studies on the association between PM2.5 pollution and outpatient visits for respiratory diseases in China were mostly limited to one region， and the different papers have no coherent results. Our objective is to perform a systematic review and meta-analysis of the relevant literature in order to summarize the association between PM2.5 pollution and outpatient visits for respiratory diseases in multiple cities in China. Condition being studied: As an important component of air pollutants, particulate matter 2.5 (PM2.5) can float in the atmosphere for a long time with a small aerodynamic size (≤2.5μm) and large specific surface area which is attached to a variety of toxic and harmful substances . PM2.5 can deposite under the trachea of the respiratory tract, reaching deep into the alveolar area, damaging alveolar macrophages and type Ⅱ alveolar epithelial cells, inducing alveolar inflammation, resulting in decreased immunity of the respiratory tract and interfering with normal physiological functions of the lungs.

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Stokes, A. W. SF? tracer gas used to trace airflow through abandoned mine workings. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/304791.

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Harkema, Marcel, Dick Quartel, Rob van der Mei e Bart Gijsen. JPMT: A Java Performance Monitoring Tool. Centre for Telematics and Information Technology (CTIT), 2003. http://dx.doi.org/10.3990/1.5152400.

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This paper describes our Java Performance Monitoring Toolkit (JPMT), which is developed for detailed analysis of the behavior and performance of Java applications. JPMT represents internal execution behavior of Java applications by event traces, where each event represents the occurrence of some activity, such as thread creation, method invocation, and locking contention. JPMT supports event filtering during and after application execution. Each event is annotated by high-resolution performance attributes, e.g., duration of locking contention and CPU time usage by method invocations. JPMT is an open toolkit, its event trace API can be used to develop custom performance analysis applications. JPMT comes with an event trace visualizer and a command-line event trace query tool for scripting purposes. The instrumentation required for monitoring the application is added transparently to the user during run-time. Overhead is minimized by only instrumenting for events the user is interested in and by careful implementation of the instrumentation itself.

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Shattuck, Judson L., Vincent M. Parisi e Arryn J. Smerdon. Head Tracker Evaluation Utilizing the Dynamic Tracker Test Fixture. Fort Belvoir, VA: Defense Technical Information Center, marzo 2007. http://dx.doi.org/10.21236/ada470391.

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Pezullo, Giani. The Mu2e Tracker. Office of Scientific and Technical Information (OSTI), luglio 2018. http://dx.doi.org/10.2172/1579229.

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Heard, Helen. Consumer Handwashing Tracker. Food Standards Agency, agosto 2022. http://dx.doi.org/10.46756/sci.fsa.wiy863.

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Between April 2020 and January 2022, the Food Standards Agency (FSA) commissioned a quarterly survey on consumer handwashing. Key findings from this survey are: Across all waves of the handwashing tracker, participants were most likely to report washing their hands with soap and warm water. However, the proportion who reported handwashing with soap and warm water ‘always’ or ‘most of the time’ declined over time (79% April 2020, compared to 68% in January 2022). Most participants reported washing their hands for between 20 and 24 seconds across all waves. However, the proportion who reported this significantly declined over time (was 35% in April 2020, down to 27% in January 2022). Over time, there was a significant decrease in the proportion of participants who reported ‘always’ washing their hands in the following scenarios inside the home: before cooking/preparing food (72% in April 2020, 62% in January 2022) before eating (48% in April 2020, 42% in January 2022) after handling rubbish (73% in April 2020, 65% in January 2022) when arriving home, after a trip outside of the home (55% in April 2020, 47% in January 2022) Reported handwashing after contact with animals (including pets) remained broadly stable over time. On average, across all waves, 36% of participants with a pet reported washing their hands ‘always’ after contact with animals, (whilst 26% reported doing this ‘most of the time’, 30% reported doing this ‘sometimes’ and 7% reported ‘never’ washing their hands after contact with animals). Over time, there was a significant decrease in the proportion of participants who reported ‘always’ washing their hands in the following scenarios outside of the home: when eating a picnic (35% in July 2020, 29% in January 2022) when consuming a takeaway outside of the home (35% in July 2020, 30% in January 2022) Since a peak in October 2020 (43%), the proportion of participants who reported ‘always’ washing their hands after blowing their nose, sneezing or coughing into their hands gradually declined and was significantly lower in January 2022 (35%). The proportion of participants who reported ‘always’ washing their hands after using the toilet also declined over time. In April 2020 87% of participants reported ‘always’ washing their hands after using the toilet, decreasing significantly to 80% in January 2022. Across all waves, most participants reported carrying and using hand sanitising gel as a hand washing alternative in a range of scenarios, but the proportion who reported doing this declined over time. For example: 55% of participants reported using hand sanitising gel after using public transport in October 2020, declining significantly to 44% in January 2022 54% of participants reported using hand sanitising gel when attending a social event in October 2020, declining significantly to 45% January 2022.

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Agency, Food Standards. Consumer Insights Tracker. Food Standards Agency, ottobre 2023. http://dx.doi.org/10.46756/sci.fsa.nfy518.

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The Consumer Insights Tracker is the FSA’s monthly tracking survey that monitors changes in consumers’ behaviour and attitudes in relation to food. Each month, the survey is conducted with approximately 2,000 adults (aged 16 or over) in England, Wales and Northern Ireland who are signed up to an online survey panel. The tracker is currently run by YouGov. The Consumer Insights Tracker complements our flagship Food and You 2 survey, which collects more robust data on a biannual basis, providing longer term monitoring of consumer behaviour and attitudes over time. The key differences between the two surveys are summarised below

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