David Trowbridge

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Pedigree-taking skills can promote an understanding of how genetic information relates to a comprehensive family health assessment. The format of the pedigree is used to structure and organize data gathered in the assessment process. The pedigree can assist the nurse and genetics specialist to identify possible patterns of inheritance. This article outlines(More)
Iterated Function Systems are a celebrated class of dynamical systems in the computer graphics world. By defining a constrictive set of functions and recursing, beautiful fractal images can be created. Classically these systems use a set of affine transformations, such as in Sierpinski’s Gasket. More complex versions of these can be seen in the popular(More)
BACKGROUND Esophageal detector devices (EDDs) impose negative pressure on the trachea or esophagus to verify endotracheal tube (ETT) position. In cardiac arrest, the smooth muscle of the lower esophageal sphincter relaxes in a time-dependent and irreversible manner. If relaxation also occurs in the muscular posterior tracheal wall, it could predispose(More)
Sarcoidosis is a multisystem granulomatous disease that affects 10 to 20 people per 100,000 in the United States. Hypercalcemia is a known side effect of the disease and in rare instances has been shown to cause ST-segment elevation on electrocardiogram testing that mimics myocardial infarction. Herein, we present a rare case of a 55-year-old, asymptomatic(More)
The difficult intubation is one of the most trying situations encountered in airway management. Transtracheal jet ventilation via needle cricothyroidotomy can provide temporary oxygenation in this critical situation in a minimally invasive fashion. The esophageal detector device (EDD) has been previously shown to be effective in determining the tracheal(More)
A procedure for the quantitation of l-epinephrine and the determination of the d-/l-epinephrine ratio in a pharmaceutical formulation containing l-epinephrine is described. The optical isomers of epinephrine were resolved by capillary electrophoresis with a buffer containing heptakis-(2,6-di-o-methyl)-beta-cyclodextrin. Quantitation was achieved with the(More)
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