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  • 1
    ISSN: 1433-0563
    Keywords: Key words Renal cell cancer • Intracaval thrombosis • Cardiopulmonary bypass • Prognostic importance ; Schlüsselwörter Nierenzellkarzinom • Kavathrombus • ; Extrakorporale Zirkulation • Prognostische Bedeutung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 4–10 % aller Patienten mit der Diagnose eines Nierenzellkarzinomes (NCC) wird die gleichzeitige Propagation eines Tumorthrombus in die Vena cava inferior bzw. das rechte Atrium beobachtet. Jüngste Untersuchungen belegten die fehlende Bedeutung des Kavathrombus im Sinne einer biologischen Variable von unabhängiger prognostischer Relevanz. Obwohl sich aufgrund der fehlenden Verfügbarkeit suffizienter konservativ-medizinischer Therapiemodalitäten in der Behandlung des NCC der Versuch einer möglichst kompletten chirurgischen Sanierung von Patienten mit Kavathrombus und ohne gleichzeitigen Nachweis regionaler Lymphknoten – oder Fernmetastasen in der klinischen Routine weitgehend etabliert hat, bleiben verschiedene Fragen, diese therapeutische Strategie betreffend, Gegenstand aktueller Diskussion. In der vorliegenden Untersuchung an 92 Patienten mit Nierenzellkarzinom und Kavathrombus konnte gezeigt werden, daß im Vergleich mit konventionellen gefäßchirurgischen Behandlungsansätzen insbesondere die Dissektion rechts-atrial propagierender Tumorthromben mittels extrakorporaler Zirkulation und kardialem Arrest offensichtlich nicht in einer höheren therapieinduzierten Mortalität resultiert. Demgegenüber wurde, wie jüngst postuliert, eine aus dieser operativen Strategie resultierende positive Beeinflussung des Langzeitüberlebens der Patienten nicht beobachtet. Auch die unabhängig vom Operationsverfahren wiederholt diskutierte prognostische Bedeutung der kranialen Thrombusextension konnte in der vorliegenden Untersuchung nicht bestätigt werden.
    Notes: Summary In approximately 4–10 % of patients presenting with renal cell cancer the transluminal propagation of a tumor thrombus into the vena cava inferior or the right atrium comes to diagnosis. Recent investigations have indicated that the presence of neoplastic extension into the venous system does not reveal independent prognostic value regarding the clinical course of the disease. Although the complete surgical removal of vena cava thrombosis in patients without simultaneously occurring regional lymph node or distant metastases has become a well established treatment modality, several questions concerning this surgical strategy still remain the subject of ongoing discussions. In the present investigation that included 92 patients with renal cell cancer and intracaval neoplastic extension it was clearly demonstrated that the use of cardiopulmonary bypass, deep hypothermia and circulatory arrest preferably during the removal of intracaval thrombosis extending into the right atrium does not result in a substantially increased treatment-related intra- or postoperative mortality. However, in contrast to a previously reported observation this treatment option did not reveal any substantial impact on the long-term survival of the patients following surgical therapy. Accordingly, the cranial extension of intracaval thrombosis was not identified as a biological variable of any prognostic importance for renal cell cancer patients.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Der Orthopäde 25 (1996), S. 435-440 
    ISSN: 1433-0431
    Keywords: Schlüsselwörter Pseudarthrose ; Wirbelsäule ; Spondylolyse ; Dens axis ; Key words Non-union ; Spine ; Spondylolysis ; Dens axis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Pseudarthroses of the spine are classified into congenital, acquired non-traumatic, posttraumatic and postoperative (iatrogenic) pseudarthroses. The various types of non-unions of the spine are described according to their clinical and radiological appearance. In line with their clinical importance, special attention with respect to the operative treatment is given to non-union of the axis of C2 and to spondylolysis. For the pseudarthrosis of the dens a posterior fusion according to Gallie-Brooks is recommended, in spondylolyses without marked slipping a „direct repair“ should be considered in young patients.
    Notes: Zusammenfassung Pseudarthrosen an der Wirbelsäule werden eingeteilt in kongenitale, erworbene nicht-traumatische, posttraumatische und postoperative Pseudarthrosen. Die einzelnen Formen der Wirbelsäulenpseudarthrose werden nach ihrem klinischen und radiologischen Bild dargestellt. Gemäß ihrer klinischen Bedeutung wird auf die operative Therapie der Denspseudarthrose und der Spondylolyse speziell hingewiesen. Für die Denspseudarthrose hat sich die hintere Spondylodese nach Gallie-Brooks bewährt, für die Spondylolyse ohne wesentliche Olisthesis ist bei jungen Patienten die direkte Sanierung in Erwägung zu ziehen.
    Type of Medium: Electronic Resource
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  • 3
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    PAGES
    In:  Past Global Change Magazine, 25 (3). pp. 140-141.
    Publication Date: 2020-05-13
    Description: The statistical properties of climate variability are often reconstructed and interpreted from single proxy records. However, variation in the proxy record is influenced by both climate and non-climate factors, and these must be understood for climate inferences to be reliable.
    Type: Article , PeerReviewed
    Format: text
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  • 4
    Publication Date: 2024-02-07
    Description: The Greenland Ice Sheet has a central role in the global climate system owing to its size, radiative effects and freshwater storage, and as a potential tipping point1. Weather stations show that the coastal regions are warming2, but the imprint of global warming in the central part of the ice sheet is unclear, owing to missing long-term observations. Current ice-core-based temperature reconstructions3,4,5 are ambiguous with respect to isolating global warming signatures from natural variability, because they are too noisy and do not include the most recent decades. By systematically redrilling ice cores, we created a high-quality reconstruction of central and north Greenland temperatures from ad 1000 until 2011. Here we show that the warming in the recent reconstructed decade exceeds the range of the pre-industrial temperature variability in the past millennium with virtual certainty (P 〈 0.001) and is on average 1.5 ± 0.4 degrees Celsius (1 standard error) warmer than the twentieth century. Our findings suggest that these exceptional temperatures arise from the superposition of natural variability with a long-term warming trend, apparent since ad 1800. The disproportionate warming is accompanied by enhanced Greenland meltwater run-off, implying that anthropogenic influence has also arrived in central and north Greenland, which might further accelerate the overall Greenland mass loss.
    Type: Article , PeerReviewed
    Format: text
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  • 5
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    Springer Nature
    In:  EPIC3Nature, Springer Nature, 613(7944), pp. 503-507, ISSN: 0028-0836
    Publication Date: 2024-04-29
    Description: The Greenland Ice Sheet has a central role in the global climate system owing to its size, radiative effects and freshwater storage, and as a potential tipping point1. Weather stations show that the coastal regions are warming2, but the imprint of global warming in the central part of the ice sheet is unclear, owing to missing long-term observations. Current ice-core-based temperature reconstructions3–5 are ambiguous with respect to isolating global warming signatures from natural variability, because they are too noisy and do not include the most recent decades. By systematically redrilling ice cores, we created a high-quality reconstruction of central and north Greenland temperatures from ad 1000 until 2011. Here we show that the warming in the recent reconstructed decade exceeds the range of the pre-industrial temperature variability in the past millennium with virtual certainty (P < 0.001) and is on average 1.5 ± 0.4 degrees Celsius (1 standard error) warmer than the twentieth century. Our findings suggest that these exceptional temperatures arise from the superposition of natural variability with a long-term warming trend, apparent since ad 1800. The disproportionate warming is accompanied by enhanced Greenland meltwater run-off, implying that anthropogenic influence has also arrived in central and north Greenland, which might further accelerate the overall Greenland mass loss.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
    Format: application/pdf
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  • 6
    Publication Date: 2024-06-22
    Description: Ice cores from polar ice sheets and glaciers are an important climate archive. Snow layers, consecutively deposited and buried, contain climatic information from the time of their formation. However, particularly low-accumulation areas are characterised by temporally intermittent precipitation, which can be further redistributed after initial deposition, depending on the local surface features at different spatial scales. Therefore, the accumulation conditions at an ice core site influence the quantity and quality of the recorded climate signal in proxy records. This study aims to characterise the local accumulation patterns and the evolution of the snow height to describe the contribution of the snow (re-)deposition to the overall noise level in climate records from ice cores. To this end, we applied a structure-from-motion photogrammetry approach to generate near-daily elevation models of the surface snow for a 195 m2 area in the vicinity of the deep drilling site of the East Greenland Ice-core Project in northeast Greenland. Based on the snow height information we derive snow height changes on a day-to-day basis throughout our observation period from May to August 2018 and find an average snow height increase of ∼ 11 cm. The spatial and temporal data set also allows an investigation of snow deposition versus depositional modifications. We observe irregular snow deposition and erosion causing uneven snow accumulation patterns, a removal of more than 60 % of the deposited snow, and a negative relationship between the initial snow height and the amount of accumulated snow. Furthermore, the surface roughness decreased by approximately a factor of 2 throughout the spring and summer season at our study site. Finally, our study shows that structure from motion is a relatively simple method to demonstrate the potential influences of depositional processes on proxy signals in snow and ice.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev , info:eu-repo/semantics/article
    Format: application/pdf
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