Articles: intubation.
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Randomized Controlled Trial Clinical Trial
Intraocular pressure and hemodynamic changes following tracheal intubation in children.
To determine the optimal time in which to make intraocular pressure (IOP) measurements in children following tracheal intubation. ⋯ We recommend that IOP be measured only after HR and MAP have returned to preintubation levels in children who have undergone tracheal intubation during halothane and N2O anesthesia.
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Acta Anaesthesiol Scand · Jul 1991
Randomized Controlled Trial Comparative Study Clinical TrialHemodynamic and catecholamine responses to laryngoscopy with vs. without endotracheal intubation.
To study the relationship between the intensity of the stimulus exerted against the base of the tongue during direct laryngoscopy and the magnitude of associated hemodynamic and catecholamine responses, a study was conducted in 40 ASA I or II patients. Laryngoscopy lasting 40 s was performed with a size 3 Macintosh blade connected to a force-displacement transducer. The intensity of the stimulus exerted during laryngoscopy is expressed by the product of its average force (N) and duration (s) and given as impulse in Ns. ⋯ The mechanisms of the responses to laryngoscopy and orotracheal intubation are proposed to be by somato-visceral reflexes. Stimulation of proprioceptors at the base of the tongue during laryngoscopy induces impulse-dependent increases of systemic blood pressure, heart rate and plasma catecholamine concentrations. Subsequent orotracheal intubation recruits additional receptors that elicit augmented hemodynamic and epinephrine responses as well as some vagal inhibition of the heart.