Ann Oto Rhinol Laryn
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Ann Oto Rhinol Laryn · Jul 1992
Lidocaine effects on the laryngeal chemoreflex, mechanoreflex, and afferent electrical stimulation reflex.
The use of lidocaine hydrochloride as either a topical or intravenous agent has become a common practice for minimizing laryngospasm and the reflex cardiovascular effects resulting from upper airway manipulation. The efficacy and mechanism of action of lidocaine for this purpose remain unclear. We evaluated the effect of lidocaine on the laryngeal chemoreflex (LCR), mechanoreflex (LMR), and superior laryngeal nerve electrical stimulation adductor reflex (SLN-ESAR) in piglets. ⋯ This study supports topical lidocaine as a suppressant of laryngeal mucosal neuroreceptors without central neural reflex effects. Intravenous lidocaine did not affect peripheral neuroreceptors, nor did it significantly affect the latency of the SLN-ESAR neural reflex arc. Intravenous and topical lidocaine differ in mechanism of action and efficacy with regard to modulation of reflex effects induced by laryngeal stimulation.
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Ann Oto Rhinol Laryn · Apr 1992
Biography Historical Article Classical ArticleSurgical removal of the sphenopalatine ganglion. Report of three operations; elaborating an original technic to expose the pterygopalatine fossa, command the internal maxillary artery and its terminals and the infraorbital nerve and its branches. 1937.
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A retrospective review of 25 transbronchial lung biopsies in 19 pediatric patients is reported. Nineteen of these procedures used a rigid ventilating bronchoscope and a small cup biopsy forceps. ⋯ In 84% of the procedures, adequate tissue was obtained. There was a 12.5% incidence of pneumothorax and no significant pulmonary hemorrhage.
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Ann Oto Rhinol Laryn · Jan 1992
Comparative StudyComparison of new telescopic video microlaryngoscopic and standard microlaryngoscopic techniques.
A new approach to microlaryngeal surgery using a specially designed video microlaryngoscope with a rigid endoscopic telescope and an attached video camera was introduced by Kantor et al in 1990. The ability to video document and perform surgery of the larynx by viewing a high-resolution television image was demonstrated. ⋯ This paper will compare these two different techniques and discuss their advantages and disadvantages. Although the new method has many advantages, the standard microscopic technique remains as a valuable method in laryngeal surgery.