Derek G. Tsui

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In the present study, T-Spot.TB and the tuberculin skin test (TST) were compared in the screening of latent tuberculosis infection among silicotic patients. A conditional probability model was used to compare the potential clinical utilities of T-Spot.TB and TST performed on 134 silicotic subjects from December 1, 2004 to January 31, 2007. Data from a(More)
Atracurium is a mixture of ten isomers. By high-performance liquid chromatography, using acidified methanol as the mobile phase and silica support, it was separated into its three geometrical isomer groups, cis-cis, cis-trans, and trans-trans, which contain three, four, and three isomers, respectively. The clinically available form of atracurium was made up(More)
PURPOSE Personal protection equipment (PPE) is recommended for use during airway management of patients with highly contagious respiratory tract illness. While its use in chemical hazards and its effect on airway management has been assessed previously, there has been no research assessing whether this equipment affects the ability to perform tracheal(More)
The relation between plasma concentration and the effects of atracurium was studied in seven patients anaesthetised with thiopentone, fentanyl and nitrous oxide-oxygen. The response to train-of-four stimulation at ten-second intervals with tetanic stimuli applied every five minutes were recorded. The first sign of transmission returning after complete(More)
The combination of the Hill equation, which describes the concentration-effect relation, with the monoexponential function for the terminal decline of plasma concentration, yields a compound time constant, T beta s1/2. This constant is a combination of the terminal elimination half-life (T beta 1/2) and the exponent (s) of the Hill equation and may be used(More)
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