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Context sensitive half-time is deined as the time for the plasma concentration to fall to half of the value at the time of stopping an infusionThe half time will usually alter in the setting of...
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A preoperative CT scan will show the site, severity, and extent of the airway compromise to assess the level and degree of obstruction.Assess the vocal cord function preoperativelyLung function tests...
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While it continues to be used infrequently in the UK it has been withdrawn in North America and AustraliaThe most notable and potentially serious side effect of etomidate administration is the...
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Different methods have been suggested in the literatureCatheter tips positioned approximately 3 cm below the right tracheobronchial angle will lie in close proximity to the atriocaval junction but...
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Impedance and resistance are terms used to describe the opposition to electrical current flow.Resistance is used to describe opposition to flow in DC circuits, whereas impedance is used for AC...
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LASER is an acronym for Light Amplification by Stimulated Emission of Radiation.A laser comprises a laser tube constructed from an active lasing medium that can be a gas, solid or a liquid, with a...
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The Wheatstone bridge is an electrical circuit that uses an arrangement of four resistors to measure an unknown electrical resistance.The typical Wheatstone bridge contains a power source, a...
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The movement of ions across cell membranes during the depolarisation and repolarisation of myocytes and neurones generates electric potentials.Silver metal electrodes covered with a layer of silver...
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The Rayleigh refractometer utilises the refractive index of a gas to calculate its concentration.Thermal conductivity is used in katharometers. In these devices, the cooling of a...
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Absolute humidity is the mass of water vapour present in a given volume of gas at defined temperature and pressure (expressed as g of H2O/m3 of gas).Relative humidity is the mass of water vapour...
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