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The temporal distribution of decay events recorded by a gamma camera in 'list mode' differs from the Poisson distribution because of dead-time effects. We propose a new model for the dead-time behaviour of a gamma camera. The most important feature of our model is that the loss of events occurs in pairs or higher multiples due to the so-called 'pile-up'(More)
Membranous laryngotracheobronchitis (membranous croup), not previously described as a distinct entity, is characterized by diffuse inflammation of the larynx, trachea, and bronchi with adherent or semiadherent mucopurulent membranes in the subglottic trachea (conus elasticus) and in the upper trachea distal to the conus elasticus. We reviewed 28 cases of(More)
The American Academy of Pediatrics proposes the following guidelines for the pediatric perioperative anesthesia environment. Essential components are identified that make the perioperative environment satisfactory for the anesthesia care of infants and children. Such an environment promotes the safety and wellbeing of infants and children by reducing the(More)
The laryngeal mask airway (LMA) has become a popular alternative to endotracheal intubation. We report a case in which appropriate LMA placement resulted in an unrecognized neck mass and subsequent erroneous diagnosis of cervical lymphadenopathy. Otolaryngologists should be aware that the LMA may result in alterations of neck anatomy.
The purpose of this study was to determine the effect of lengthening the anesthesia residency by the American Board of Anesthesiology on the education of anesthesia subspecialists. A survey of anesthesia residency programs was conducted from 1987 to 1991. The most frequent subspecialty practice in the clinical anesthesia (CA) 3 year is cardiovascular(More)