Ulrich Föhring

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The authors surveyed existing standard codes for units of measures, such as ISO 2955, ANSI X3.50, and Health Level 7's ISO+. Because these standards specify only the character representation of units, the authors developed a semantic model for units based on dimensional analysis. Through this model, conversion between units and calculations with dimensioned(More)
A C++ implementation of the HL7 health-care data interchange standard was developed by automatic methods applied to the authoritative specification of the standard. The reusable class library thus created presents an intuitive, flexible, and easy-to-use application programming interface to the HL7 protocol. This allows HL7 applications to be developed(More)
The effects of thoracic epidural anesthesia (TEA) on total body oxygen supply-demand ratio are complex due to potential influences on both O2 delivery (QO2) and consumption (VO2). One hundred and five patients undergoing abdominal aortic surgery were randomly assigned to one of three groups to compare the cardiovascular and metabolic responses associated(More)
UNLABELLED It has been shown that the stress response to lower abdominal surgery can be inhibited by epidural analgesia (EA). But EA seems to have little influence on the stress reaction to major abdominal surgery. The purpose of our study was to find out whether EA is able to diminish the cortisol and glucose response to major transabdominal surgery. (More)
Antidepressants inhibit the re-uptake of norepinephrine at the monoaminergic synapse from the synaptic fissure, leading in this way to an increased sensitivity to catecholamines. In addition, antidepressants have alpha1-, H1- and H2-receptor blocking effects and also anticholinergic effects; the tricyclic antidepressants in particular are known for these(More)
UNLABELLED It is often suggested that atropine should be avoided in patients on treatment with tricyclic or tetracyclic antidepressants. It is feared that the strong anticholinergic side effects of these drugs could exaggerate the effects of atropine on the heart. METHODS In a controlled prospective study, 31 patients on treatment with tri- or tetracyclic(More)
UNLABELLED It is still controversial whether the perioperative incidence of cardiovascular complications is increased in patients on chronic treatment with cyclic antidepressants (AD) and whether AD medication should be discontinued prior to surgery. METHODS. We measured perioperative cardiovascular variables in 31 patients on chronic treatment with tri-(More)
Pre-oxygenation is routinely used prior to anesthesia and intubation. In awake, premedicated patients scheduled for major aortic surgery we assessed the effects of breathing oxygen for 10 min via a loosely fitting face mask on hemodynamics and oxygen consumption (VO2). RESULTS. O2-breathing increased arterial PO2 to 51 +/- 13 kPa and decreased VO2 from 109(More)
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