Results 211 to 220 of about 1,529 (247)
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Mechanisms of Expiratory Valves Resistance
American Review of Respiratory Disease, 1988Abstract Expiratory valves are the major source of resistance in ventilator circuits. Some valves, particularly under certain conditions, cause high resistances. To establish the mechanisms of expiratory valve resistance (R), we measured R of 4 commercial valves under several experimental conditions.
R A, Kayaleh, A F, Wilson
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Axial Configuration of the Velopharyngeal Valve and Its Valving Mechanism
The Cleft Palate Craniofacial Journal, 1995The variability of the normal velopharyngeal (VP) closure mechanism was studied by investigating VP anatomy in relation to its closure mechanism in 60 patients. The axial configuration of the VP isthmus, as observed in axial CT scans at rest, was found to be correlated with VP function in terms of its closure patterns in speech as observed by ...
Y, Finkelstein +5 more
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Mechanical heart valve cavitation in patients with bileaflet valves
2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2014Today, the quality of mechanical heart valves is quite high, and implantation has become a routine clinical procedure with a low operative mortality (< 5%). However, patients still face the risks of blood cell damage, thromboembolic events, and material failure of the prosthetic device.
Johansen, Peter +4 more
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Mechanical Heart Valve Cavitation: Valve Specific Parameters
The International Journal of Artificial Organs, 2004Several aspects of mechanical heart valve cavitation, in particular of “severe” vapor cavitation, have been investigated in order to describe the phenomenon of cavitation itself and to classify various mechanical heart valves with respect to their tendency to cavitation.
M J, Eichler, H M, Reul
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Bioprosthetic aortic valve replacement on a mechanical valve ring
Asian Cardiovascular and Thoracic Annals, 2014Mechanical valve failure is a known but rare occurrence in cardiac surgery. A 71-year-old lady underwent surgery for failure of her mechanical aortic valve. It was replaced with another mechanical valve. However, during operative manipulation, both leaflets fractured, resulting in a prolonged operative time.
Omer, Ashraf, Sumit, Yadav
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Mitral valve‐in‐valve with the lotus mechanically expanding platform
Catheterization and Cardiovascular Interventions, 2015Key Points Disadvantages of existing balloon expandable or self‐expanding transcatheter platforms for mitral valve‐in‐valve include the potential for malposition during deployment and for LV outflow tract obstruction Controlled mechanical valve expansion, the option to reposition, and stable hemodynamics throughout the procedure make the LOTUS valve ...
Ted, Feldman, Michael J, Reardon
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