Clinical pharmacology and therapeutics
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Clin. Pharmacol. Ther. · Jul 2008
ReviewInhaled anesthesia: the original closed-loop drug administration paradigm.
We administer anesthetics to obtain therapeutic effects and minimize untoward side effects. Anesthetists can precisely control inhaled anesthetic concentrations by controlling end-tidal volatile anesthetic concentrations. ⋯ The low solubility of modern inhaled anesthetics adds to the stability and control of the anesthetic state; the effective inhaled concentration varies little during maintenance of anesthesia unless altered by the anesthetist. A less precise closed-loop system applies a processed electroencephalogram (EEG) to assess depth of anesthesia and enable accurate delivery of volatile and intravenous anesthetics to maintain a stable state of anesthesia.
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Clin. Pharmacol. Ther. · Jul 2008
Comparative StudyExposure-response analysis for spontaneously reported dizziness in pregabalin-treated patient with generalized anxiety disorder.
To describe the pregabalin exposure-adverse event (AE) (dizziness) relationship in patients with generalized anxiety disorder, separate models were developed for the incidence of AE and for the conditional severity of AE, given that an AE has occurred using patient data from six clinical studies. The incidence component was modeled using a nonlinear logistic regression model. ⋯ The proportional odds model including a time course of appearance and disappearance of AE could adequately describe the time course of probability of dizziness. Incorporating a transition model including Markov elements improved the model fit and greatly improved the predictability of the time course of probability of dizziness.