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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Affective Disorders 17 (1989), S. 211-218 
    ISSN: 0165-0327
    Keywords: Cerebral blood flow ; Depression
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine , Psychology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of nuclear medicine 15 (1989), S. 1-8 
    ISSN: 1619-7089
    Keywords: Cerebral blood flow ; 99mTc-HMPAO ; 195mAu ; SPECT ; Three compartment model ; Uptake kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The activity concentrations of 99mTc-HMPAO in brain after intravenous injection were evaluated in 25 patients using SPECT. With additional first pass studies of heart and brain with the short lived isotope 195mAu, the cardiac output and the mean cerebral transit times of the patients were measured a short time before the HMPAO injection. The time dependence of 99mTc-HMPAO activity in the brain was registered during the first 5 min after injection over both hemispheres. Using a simplified three compartment model it was possible to calculate the mean retention fraction of HMPAO in brain from the time activity curves. It could be shown that the regional cerebral blood flow in ml/min per 100 g can be calculated from the activity concentration of HMPAO in the brain, the cardiac output and the retention fraction. In 15 of the 25 cases the rCBF was measured using the planar 133Xe inhalation method as a reference. We found a significant correlation between the mean hemisphere CBF from our method and the mean hemisphere grey matter CBF from the Xenon method with a correlation coefficient of 0.73.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 376 (1991), S. 222-227 
    ISSN: 1435-2451
    Keywords: Partial gastrectomy ; B–I partial gastrectomy ; Roux-en-Y partial gastrectomy ; Gastric emptying
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei Hausschweinen wurden 2/3-Magenresektionen mit erhaltener sowie ausgeschalteter Duodenalpassage durchgeführt, die Magenentleerung szintigraphisch über 4 h gemessen und einer Vergleichsgruppe nichtresezierter Tiere gegenübergestellt. Für die halbfeste, mit 99mTc markierte Testmahlzeit fanden sich experimentell keine Hinweise für eine verzögerte Magenentleerung nach Ausschaltung der Duodenalpassage durch Roux-Rekonstruktion. B-I- and B-II-Roux-Resektion differierten in der Magenentleerung nicht. Die Längenänderung der bei der Roux-Rekonstruktion verwendeten Jejunumschlinge von 40 auf 20 cm hatte keinen Einfluß auf die Magenentleerung. Die Roux-Rekonstruktion mit trunkulärer Vagotomie führte — bei jedoch großer individueller Streubreite — im Vergleich zur B–I-Resektion zu einer Beschleunigung der Magenentleerung. Die mittlere Restaktivität im Magen betrug nach 240 min für die Kontrollgruppe (n=5) 47,8%, nach B–I-Resektion (n=5) 78,9%, nach Roux-Rekonstruktion mit 40 cm-Schlinge (n=5) 59,0%, nach Roux-Rekonstruktion mit 20 cm-Schlinge (n = 5) 38,1 % and nach Roux-Resektion mit trunkularer Vagotomie (n=4) 20,9%.
    Notes: Summary On domestic pigs 2/3 gastrectomies with retention and elimination of the duodenal passage were carried out. Postprandial gastric emptying was measured scintigraphically for 4 h and compared with a control group (laparotomy only). For the semi-solid, 99mTc-labeled test meal delayed gastric emptying after elimination of the duodenal passage by Roux reconstruction could not be shown. There was no difference in gastric emptying between B-I and Roux-en-Y partial gastrectomy. Also alteration of the length of the jejunum loop from 40 to 20 cm after Roux-en-Y reconstruction had no influence on gastric emptying. Roux reconstruction (40 cm loop) in combination with truncal vagotomy led to a non-uniform gastric emptying, but there was a statistically proven acceleration compared with B-I resection. After 240 min the mean residual intragastric activity of the control group (n=5) was 47.8%, 78.9% after B–I resection (n=5), 59% after Roux reconstruction with 40 cm jejunal loop (n=5), 38.1% after Roux reconstruction with 20 cm jejunal loop (n=5) and 20.9% after Roux-en-Y (40 cm loop) with truncal vagotomy (n = 4).
    Type of Medium: Electronic Resource
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