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  • 1
    Digitale Medien
    Digitale Medien
    Repair of cerebrospinal fluid rhinorrhoea with pedicled dural flap (1979)
    Springer
    Acta neurochirurgica 45 (1979), S. 237-246 
    Details
    ISSN: 0942-0940
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Four cases of persistent cerebrospinal fluid rhinorrhoea through the ethmoid sinus are presented. Using the operative microscope, the margin of the dural defect was easily identified, and a pedicled dural flap supplied by branches of a meningeal artery was successfully sutured to the dural margin in a watertight fashion without increasing pre-existing neurological deficits. To prevent intracranial infection, the watertight closure with a predicled dural flap is presumably more complete and reasonable than are various grafts without vascular circulation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01769138
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Attenuation values of chronic subdural haematoma and subdural effusion in CT scans (1984)
    Springer
    Acta neurochirurgica 72 (1984), S. 211-217 
    Details
    ISSN: 0942-0940
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary When peripheral blood is serially diluted with saline solution, the bloody colour is determined by the derivative of haemoglobin. Solutions over 105/mm3 red cells or 0.5 g/dl haemoglobin are represented as being sanguineous. This is the lower limit for a subdural haematoma, because the name itself requires at least a bloody appearance of its contents. Diluted blood solutions less 0.5×104 red cells or 15 mg/dl haemoglobin are macroscopically translucent or watery clear. Solutions between bloody and translucent are xanthochromic. If the contents of a subdural collection is watery clear or xanthochromic, it must be called an effusion or hygroma. The haemoglobin in haematomas is the most important factor determining the attenuation values in the CT scan. Protein, iron or calcium ions have only minimal concentration in haematomas and are neglegible for attenuation values of haematomas in the CT scan. The lightest sanguineous solution, that is a haematoma, corresponds to 15 Hounsfield's units measured by the CT scan.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01406871
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  • 3
    Digitale Medien
    Digitale Medien
    Peritumoral oedema and lipid content (1986)
    Springer
    Acta neurochirurgica 80 (1986), S. 128-130 
    Details
    ISSN: 0942-0940
    Schlagwort(e): Brain oedema ; lipid ; computerized tomography
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The authors analyzed the water and lipid contents of oedematous tissues of white matter obtained during the operation, comparing with the absorption value in the CT scan. As the absorption value lowered its level, the water content increased, while the lipid decreased. However, after subtracting these two components, the content of protein also showed a significant decrement parallel to the absorption value despite the existence of extravasated protein. The decrement of lipid content was considered to be due to a dilution effect by an expanded volume of extravasated oedema fluid, as well as the decrease in protein, rather than the actual loss of tissue component; that is demyelination. It is the relative decrease in protein content which contributes to the low absorption value of oedematous tissue.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01812287
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  • 4
    Digitale Medien
    Digitale Medien
    Intracranial epidermoids—Concerning the low absorption value on computerized tomography (1985)
    Springer
    Acta neurochirurgica 78 (1985), S. 33-37 
    Details
    ISSN: 0942-0940
    Schlagwort(e): Intracranial epidermoid ; computerized tomography ; absorption value ; metrizamide CT scan
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The authors analysed the contents of two intracranial epidermoids showing low density on computerized tomography. Although both cases had approximately similar composition, 85, 83% for water, 12,12.5% for protein, 3,4.5% for total lipid including cholesterol, respectively, the absorption values differed from each other. Both tumours were identified to communicate with CSF, one by delayed metrizamide CT scan and the other by direct aspiration during operation. The low absorption values in both cases resembled or were slightly higher than that of CSF in each case, and not a single pixel showed negative values for lipid. These findings suggest that it is the CSF content within the anatomical interstices or structural crevice of the tumour, rather than cholesterol, which is responsible for the low absorption values which appeared in the CT scan.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01809238
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