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- Avdeev, S. V., et al.
(author)
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Preliminary results of studying the effect of heavy charged particles on the human central nervous system in experiments SilEye and Alteino
- 2005
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In: Bulletin of the Russian Academy of Sciences: Physics. - 1062-8738. ; 69:3, s. 512-514
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Journal article (peer-reviewed)abstract
- A series of experiments were carried out in the period 1995 to 2002 to study the phenomenon of light flashes (LFs) which arose in the eyes of astronauts. These experiments were made onboard the Mir orbital station (SilEye, SilEye-2) and on the Russian segment of the International Space Station (SilEye-3/Alteino). As a result of investigation it is reliably demonstrated that the majority of light flashes under conditions of a space flight are caused by nuclei of cosmic rays. Electric signals from brain, recorded during LF occurrence, were an important final result of these studies.
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- Hoffman, Lindsey M., et al.
(author)
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Clinical, Radiologic, Pathologic, and Molecular Characteristics of Long-Term Survivors of Diffuse Intrinsic Pontine Glioma (DIPG) : A Collaborative Report From the International and European Society for Pediatric Oncology DIPG Registries
- 2018
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In: Journal of Clinical Oncology. - : AMER SOC CLINICAL ONCOLOGY. - 0732-183X .- 1527-7755. ; 36:19, s. 1963-1972
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Journal article (peer-reviewed)abstract
- PurposeDiffuse intrinsic pontine glioma (DIPG) is a brainstem malignancy with a median survival of < 1 year. The International and European Society for Pediatric Oncology DIPG Registries collaborated to compare clinical, radiologic, and histomolecular characteristics between short-term survivors (STSs) and long-term survivors (LTSs).Materials and MethodsData abstracted from registry databases included patients from North America, Australia, Germany, Austria, Switzerland, the Netherlands, Italy, France, the United Kingdom, and Croatia.ResultsAmong 1,130 pediatric and young adults with radiographically confirmed DIPG, 122 (11%) were excluded. Of the 1,008 remaining patients, 101 (10%) were LTSs (survival 2 years). Median survival time was 11 months (interquartile range, 7.5 to 16 months), and 1-, 2-, 3-, 4-, and 5-year survival rates were 42.3% (95% CI, 38.1% to 44.1%), 9.6% (95% CI, 7.8% to 11.3%), 4.3% (95% CI, 3.2% to 5.8%), 3.2% (95% CI, 2.4% to 4.6%), and 2.2% (95% CI, 1.4% to 3.4%), respectively. LTSs, compared with STSs, more commonly presented at age < 3 or > 10 years (11% v 3% and 33% v 23%, respectively; P < .001) and with longer symptom duration (P < .001). STSs, compared with LTSs, more commonly presented with cranial nerve palsy (83% v 73%, respectively; P = .008), ring enhancement (38% v 23%, respectively; P = .007), necrosis (42% v 26%, respectively; P = .009), and extrapontine extension (92% v 86%, respectively; P = .04). LTSs more commonly received systemic therapy at diagnosis (88% v 75% for STSs; P = .005). Biopsies and autopsies were performed in 299 patients (30%) and 77 patients (10%), respectively; 181 tumors (48%) were molecularly characterized. LTSs were more likely to harbor a HIST1H3B mutation (odds ratio, 1.28; 95% CI, 1.1 to 1.5; P = .002).ConclusionWe report clinical, radiologic, and molecular factors that correlate with survival in children and young adults with DIPG, which are important for risk stratification in future clinical trials.
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- Lauten, Alexander, et al.
(author)
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Percutaneous Left-Ventricular Support With the Impella-2.5-Assist Device in Acute Cardiogenic Shock Results of the Impella-EUROSHOCK-Registry
- 2013
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In: Circulation Heart Failure. - 1941-3289 .- 1941-3297. ; 6:1, s. 23-30
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Journal article (peer-reviewed)abstract
- Background-Acute cardiogenic shock after myocardial infarction is associated with high in-hospital mortality attributable to persisting low-cardiac output. The Impella-EUROSHOCK-registry evaluates the safety and efficacy of the Impella-2.5-percutaneous left-ventricular assist device in patients with cardiogenic shock after acute myocardial infarction. Methods and Results-This multicenter registry retrospectively included 120 patients (63.6 +/- 12.2 years; 81.7% male) with cardiogenic shock from acute myocardial infarction receiving temporary circulatory support with the Impella-2.5-percutaneous left-ventricular assist device. The primary end point evaluated mortality at 30 days. The secondary end point analyzed the change of plasma lactate after the institution of hemodynamic support, and the rate of early major adverse cardiac and cerebrovascular events as well as long-term survival. Thirty-day mortality was 64.2% in the study population. After Impella-2.5-percutaneous left-ventricular assist device implantation, lactate levels decreased from 5.8 +/- 5.0 mmol/L to 4.7 +/- 5.4 mmol/L (P=0.28) and 2.5 +/- 2.6 mmol/L (P=0.023) at 24 and 48 hours, respectively. Early major adverse cardiac and cerebrovascular events were reported in 18 (15%) patients. Major bleeding at the vascular access site, hemolysis, and pericardial tamponade occurred in 34 (28.6%), 9 (7.5%), and 2 (1.7%) patients, respectively. The parameters of age >65 and lactate level >3.8 mmol/L at admission were identified as predictors of 30-day mortality. After 317 +/- 526 days of follow-up, survival was 28.3%. Conclusions-In patients with acute cardiogenic shock from acute myocardial infarction, Impella 2.5-treatment is feasible and results in a reduction of lactate levels, suggesting improved organ perfusion. However, 30-day mortality remains high in these patients. This likely reflects the last-resort character of Impella-2.5-application in selected patients with a poor hemodynamic profile and a greater imminent risk of death. Carefully conducted randomized controlled trials are necessary to evaluate the efficacy of Impella-2.5-support in this high-risk patient group.
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- Vomiero, Alberto, et al.
(author)
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Investigation on the oxidation process of SiCO glasses by the means of non-Rutherford backscattering spectrometry
- 2003
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In: Nuclear Instruments and Methods in Physics Research Section B. - 0168-583X .- 1872-9584. ; 211:3, s. 401-407
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Journal article (peer-reviewed)abstract
- Ion beam analysis was applied for the first time to characterize the oxidation process of silicon oxycarbides (SiCO) glasses (belonging to the class of polymer-derived ceramics). The technique unveiled the structure of the interface between the silica scale and the SiCO substrate. At the early oxidation stage, a smooth concentration profile was observed between the surface silica layer and the substrate. The role of the free carbon on the kinetics of the oxidation process was studied by preparing samples with different carbon content. A high amount of free C in the SiCO glasses promotes the transition, after long oxidation periods, to a sharp interface between the silica scale and the SiCO substrate. © 2003 Elsevier Science B.V. All rights reserved.
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