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BACKGROUND "Ideal" alveolar oxygen tension (PAO2) is a calculated entity and the alveolar-arterial oxygen tension difference (PA-aO2) is used to evaluate gas exchange function of the lungs. Accurate calculations of PAO2 necessitate measurements of the respiratory exchange ratio (RER), which is less frequently done, and most often approximations are made.(More)
This paper presents a configurable framework to be used for rapid prototyping of stream based languages. The framework is based on a set of design patterns defining the elementary structure of a domain specific language for high-performance signal processing. A stream language prototype for baseband processing has been implemented using the framework. We(More)
%DFNJURXQG Since the launch of the English-language version of the Al-Jazeera website March 25 it has been unavailable due to various denial of service (DoS) attacks [1]. The attacks have been both in the form of intentional distributed DoS (DDoS) attacks and a barrage of e-mails, a form of " unintentional " denial of service. There is even talk about the(More)
OBJECTIVE The purpose of this investigation was to study the N2 flux between the patient and the breathing circuit, and the excess gas during N2O anesthesia with the low, fresh gas flow technique. METHODS Forty patients were studied. After a 6-minute high, fresh gas flow denitrogenation period, the O2 fresh gas flow was set at about 4 ml/kg/min and the(More)
Cardiovascular function was studied in a model of intestinal vascular obstruction in cats. To measure right ventricular end diastolic pressure and maximal dP/dt, a tip transducer catheter was placed into the right ventricle. The intestinal vascular obstruction resulted in shock with decreases of blood pressure, cardiac output, and external cardiac work.(More)
BACKGROUND The paramagnetic technique has made it possible to monitor the end-tidal oxygen concentration and P(1-ET)O2, i.e. inspiratory to end-tidal oxygen difference, breath-by-breath. Little is known about the implications of a changing P(1-ET)O2, but so far studies have shown it to be a quick and sensitive variable to detect hypoventilation. This study(More)
Bolus doses of ephedrine are often used by anaesthesiologists for intraoperative hypotension. This randomized single-blind cross-over study was designed to simultaneously evaluate circulatory, respiratory and metabolic effects of intravenously given ephedrine in 12 healthy male volunteers. Oxygen uptake and carbon dioxide excretion were measured with(More)
OBJECTIVE Fast paramagnetic oxygen analyzers have made it possible to measure inspiratory to end-tidal oxygen concentration difference (P(I-ET)O2) breath-by-breath. It is now frequently displayed on monitors during routine anesthesia. We wanted to study the effects of major changes in metabolism, ventilation and circulation on P(I-ET)O2. METHODS Ten(More)