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Drugs of abuse testing is used in various areas of society for detection and follow-up of drug use. In routine laboratory drug testing, immunoassays are employed for initial screening of specimens to indicate the presence of drugs. To confirm a positive screening test, a secondary analysis by mass spectrometry is performed. The »cut-off« is the pre-defined concentration threshold of a drug or drug
BACKGROUND: Severe meningitis may compromise cerebral perfusion through increases in intracranial pressure (ICP) and through hypovolemia caused by a general inflammation with systemic plasma leakage. From its antiaggregative/antiadhesive and permeability-reducing properties, prostacyclin (PGI2) is a potential adjuvant treatment in meningitis, but previously published data have been ambiguous. The
In this paper we derive and evaluate by receiver tests a method for pruning tree representations of MIMO signals. The efficiency of the method is compared to that of standard tree pruning used for sphere decoders for several different MIMO system setups. The outcome is that savings up to 50\% compared to the standard sphere decoder are possible.
Abnormal blood velocity in the ductus venosus is more frequently detected than pulsations in the umbilical vein, but both are considered indicators of fetal compromise. The aim of this study was to investigate blood flow patterns in the ductus venosus and the association between individual blood velocity ratios and pulsations in the umbilical vein and perinatal outcome.
Epilepsi är den vanligaste neurologiska sjukdomen efter stroke och huvudvärk, ca 60 000 personer har aktiv epilepsi i Sverige. Vi har idag tillgång till en rad mycket effektiva läkemedel, bara sedan 1989 har åtta nya epilepsimediciner registrerats. Trots den utvidgade behandlingsarsenalen bli bara två av tre patienter anfallsfria av läkemedel, för en tredjedel fortsätter anfallen att komma. Vid fa
Abstract Data from arthroplasty registers are often analyzed using survival methods. Several methodological problems exist, for example relating to competing events, non-random censoring, non-proportional hazards and dependent observations. League tables and ranking of specific survival results leds to further methodological difficulties. Most of these problems are, however, well known and a numbe
Clinical diagnosis of acute mesenteric ischemia is difficult. The aim of this review is to provide current status on the search for an accurate plasma biomarker for acute mesenteric ischemia. A search using the medical subject heading terms marker and mesenteric ischemia or intestinal ischemia or superior mesenteric artery occlusion or mesenteric venous thrombosis in the Medline and Embase databas
