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Institute
- Medizin (33)
Aim: The aim of this study was to measure cortico-cortical connectivity in multiple sclerosis (MS) patients by TMS-evoked potential (TEP) latencies in EEG evoked by transcranial magnetic stimulation (TMS) of the hand area of the primary motor cortex of one hemisphere. TEPs were recorded on the stimulated- and at the homologue site in the non-stimulated contralateral hemisphere. Both interhemispheric directions were tested. Interhemispheric latencies of the two main reproducible TEPs, the positive component at 60 ms and the negative component at 100 ms (P60 and N100, respectively), were expected to be significantly prolonged in MS-patients compared to healthy volunteers.
Material and methods: The study compared interhemispheric propagation of P60 and N100 in groups of 12 patients with early-stage relapsing-remitting MS (RRMS) and 16 age- and gender-matched healthy controls. The study was approved by the Ethics Committee of the Medical Faculty of the Goethe-University of Frankfurt/Main and conformed to the latest revision of the Declaration of Helsinki of 2008. TEPs were recorded by means of EEG and their latencies were statistically evaluated in 10 channels around the stimulation site and in 10 corresponding electrodes in the non-stimulated contralateral hemisphere. Interhemispheric conduction time was calculated by the difference of TEP latency in non-stimulated vs. stimulated hemisphere.
Results: An ANOVA on interhemispheric conduction time showed a significant prolongation for the N100 from left to right hemisphere in MS compared to controls, while no group differences were found for the P60 and the N100 from right to left hemisphere.
Conclusion: The results provide first evidence that the N100 may constitute an interesting marker to measure interhemispheric conduction delays in early-stage RRMS. The specificity of the present finding and its relation to fiber tract pathology should be examined in further correlative analyses with diffusion tensor imaging and other structural MRI data.
Smoking tobacco throughout pregnancy is one of the single most important avoidable causes of adverse pregnancy outcomes. If compared with other risk factors in the perinatal period, exposure to tobacco smoke is considered to be amongst the most harmful. It is associated with high rates of long and short term morbidity and mortality for mother and child. Despite this importance until now a scientometric analysis about the development and the state of scientific knowledge about smoking and pregnancy has not been published. In order to close this gap this work was conceived. In this dissertation quantitative and qualitative data on this topic was analyzed using a variety of objective scientometric methods like the number of scientific contributions, the number of citations and the modified Hirsch-index (H-index). A collective volume of 10,043 entries covering a time period from 1900 to December 5, 2012 was obtained from the Web of Science (WoS) data base. Publishing activities of authors, institutions and countries, their cooperation, reception within the international scientific community and its reactions were interpreted and illustrated.
Background: Candida spp. are a frequent cause of nosocomial bloodstream infections worldwide.
Objective: To evaluate the use patterns and outcomes associated with intravenous (IV) fluconazole therapy in intensive care units in Spain and Germany.
Patients and methods: The research reported here was a prospective multicenter longitudinal observational study in adult intensive care unit patients receiving IV fluconazole. Demographic, microbiologic, therapy success, length of hospital stay, adverse event, and all-cause mortality data were collected at 14 sites in Spain and five in Germany, from February 2004 to November 2005.
Results: Patients (n = 303) received prophylaxis (n = 29), empiric therapy (n = 140), preemptive therapy (n = 85), or definitive therapy (n = 49). A total of 298 patients (98.4%) were treated with IV fluconazole as first-line therapy. The treating physicians judged therapy successful in 66% of prophylactic, 55% of empiric, 45% of preemptive, and 43% of definitive group patients. In the subgroup of 152 patients with proven and specified Candida infection only, 32% suffered from Candida specified as potentially resistant to IV fluconazole. The overall mortality rate was 42%.
Conclusion: Our study informs treatment decision makers that approximately 32% of the patients with microbiological results available suffered from Candida specified as potentially resistant to IV fluconazole, highlighting the importance of appropriate therapy.