| Static forces variation and pressure distribution in laryngoscopy performed by straight and curved blades. | |
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MedLine Citation:
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PMID: 19964742 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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A theoretical analysis of the forces acting on the laryngoscope during the lifting of the epiglottis is carried out by applying the basic principles of statics. The static model of a laryngoscope equipped with a straight and a curved blade and the forces variation, as a function of the introduction angle and of tissue reaction application point, are described. The pharyngeal tissues and epiglottis pressure distribution on the blade is obtained, with a 1mm(2) resolution, by measurements performed in-vitro on a simulation mannequin, using straight and curved blades. The straight blade requires more effort than the curved one to obtain the same visualization of vocal cords, however forces exerted by using a laryngoscope with a curved blade do not vary linearly with the application point of tissue reaction. Average intensity of the tissue reaction has been found in the order of 32+/-11N. Pressure distribution is maximally concentrated on the tip of curved blades (0.5MPa on 5mm axial length), whereas it is more dispersed on straight blades (0.2MPa on 10mm axial length). The inclination of the handle also influences the effort of the operator: for both blades, from 0rad to 1.57rad, the lifting force shows a total variation of about 13% of the top value, the transversal forces vary less than 6% of the top value. |
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Authors:
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S Cecchini; S Silvestri; M Carassiti; F E Agro |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference Volume: 1 ISSN: 1557-170X ISO Abbreviation: Conf Proc IEEE Eng Med Biol Soc Publication Date: 2009 |
Date Detail:
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Created Date: 2009-12-07 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101243413 Medline TA: Conf Proc IEEE Eng Med Biol Soc Country: United States |
Other Details:
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Languages: eng Pagination: 865-8 Citation Subset: IM |
Affiliation:
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Faculty of Biomedical Engineering, University Campus Bio-Medico of Rome, Italy. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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