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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    ISSN: 1432-2218
    Keywords: Fibrin-coated collagen fleece (Tachocomb) ; Endoscopic surgery ; Tachocomb application system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Diffuse bleeding from parenchymatous organs or bleeding of the lung both in conventional and endoscopic surgery has to this day been treated with the usual methods — coagulation, tamponade, or oversewing. Methods: With the development by the pharmaceutical industry of a collagen fleece coated with fibrin glue (Tachocomb), an additional method of hemostasis became available. Results: The positive results obtained with the fibrin-coated collagen fleece in conventional surgery encouraged us to employ it when performing endoscopic operations. Especially with laparoscopic cholecystectomies, but also in other endoscopic operations, the application of Tachocomb has proved very successful. Nevertheless, the method of applying Tachocomb was not adequate, and limited its use, which made it necessary for us to develop an application system for endoscopic use. Conclusions: The application system, which consists of a fan as the Tachocomb carrier and a mounting support, worked well during the first tests. In order to confirm this, clinical studies will now be carried out.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 92 (1934), S. 282-282 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 91 (1934), S. 767-774 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Zwischcn konzentrischen Elektroden hatten Güntherschulze und Keller bei den Edelgasen Ar und Ne den Normalgradienten Null gemessen. Es wird eine Rechnung darüber durchgeführt, ob diese Erscheinung sich durch Elektronendiffusion von der Kathode zur Anode infolge eines Elektronenkonzentrationsgefälles erklären läßt. Die Rechnung ergibt, daß bei Verwendung des von Kenty gemessenen Wiedervereinigungskoeffizienten von 2·10−10 für Ar die Konzentration an der Kathode, die nötig ist, um den gemessenen Strom durch Diffusion aufrecht zu erhalten, bis zu 70 Tor noch in möglichen Grenzen liegt. Für He und Ne liegt dieser Grenzdruck, unter der Annahme, daß der Wiedervereinigungskoeffizient der gleiche wie bei Ar ist, noch höher. Zum Schluß wird das Verhalten unedler Gase und die Genauigkeit der Rechnung diskutiert.
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  • 4
    ISSN: 0949-2925
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
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  • 5
    ISSN: 1612-4766
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Zusammenfassung In ersten, orientierenden Versuchen wurde die Wirkung des tschechischenBeauveria bassiana-Präparates „Boverol” allein und in Kombination mit Pheromonfallen auf die Mortalität und das Brutverhalten des Buchdruckers,Ips typographus, untersucht. Pathogenitätstests ergaben eine Verpilzungsrate von 88,0 bis 96,7%. Wurden Käfer nach der oberflächlichen Kontamination sofort zur Brutablage an frische, berindete Fichtenstücke gesetzt, so betrug die Reduktion der Brutleistung gegenüber der Kontrolle nur etwa 23 bis 29%. Bei der geschlüpften F1-Generation von kontaminierten Altkäfern konnten keine Unterschiede zu den vergleichbaren Jungkäfern aus der unbehandelten Kontrolle festgestellt werden. Eine Übertragung des Pilzes vom Altkäfer auf den Jungkäfer fand nur in Ausnahmefällen statt. Im Freiland wurde die Wirkung einer Kombination von Pheromonfalle mitB. bassiana getestet, wobei das Einbohrverhalten und die Brutleistung der Käfer in einer darunter eingekäfigten Fichtenrolle überprüft wurden. Die Zahl der Einbohrlöcher war in der BOVEROL-Variante um etwa 15% verringert, die F1-Generation jedoch um nahezu 60%. Mögliche Einsatzstrategien vonBeauveria bassiana mit Hilfe von Pheromonfallen beiIps typographus werden erörtert.
    Notes: Abstract In first, preliminary experiments, the efficacy of the CzechBeauveria bassiana product „Boverol” alone and in combination with pheromone traps on the mortality and the breeding behavior of the bark beetle,Ips typographus, was investigated. Pathogenicity tests resulted in a mortality due to the fungus of 88.0 to 96.7%. When the beetles were given directly after superficial contamination on fresh spruce pieces with bark, the reduction of the breeding efficacy was 23 to 29% compared to the untreated control. No differences between the hatched beetles from the F1-generation of contaminated beetles and those of the untreated control beetles were observed. A transfer of the fungus from the parent beetle to the young beetle was noticed only in a few cases. In the field, the efficacy of a combination of a pheromone trap withB. bassiana was tested. The number of bore holes and the breeding was measured using a caged spruce log. In the combination, the number of bore holes was reduced by 15%, but the F1-generation nearly by 60%. Possible strategies for the use ofB. bassiana in combination with pheromone traps againstIps typographus are discussed.
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  • 6
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
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  • 7
    ISSN: 1432-1963
    Keywords: Schlüsselwörter Magenkarzinom ; Adenokarzinom ; Infiltrativer Typ (Ming) ; Key words Stomach cancer ; Adenocarcinoma ; Infiltrative type (Ming)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Gastric carcinoma of the infiltrative type (according to Ming) occasionally shows adenomatous differentiation only. Over the past 18 years, we have observed 23 cases of this tumour type, accounting for 3.6 % of all surgically treated gastric carcinomas. Macroscopically they were classified as Borrmann IV or III, while histologically most of them were well differentiated. Histologically, these tumours retained the pre-existing structures of the stomach, most readily observable at the tunica muscularis propria; a pronounced desmoplasia was also characteristic, particularly in the submucosal and subserosal layers. In all cases the tumour tissue spread inside lymphatic vessels. All but 2 cases with metastatically involved lymph nodes, often small, showed infiltration of the lymph node sinus; in three quarters of cases the serosa was infiltrated by the tumour. Significant findings among the patients under observation for extended periods included bilateral ovarian metastases in 4 of 5 women examined and tumour recurrence at the anastomosis in 6 of 9 patients in whom Billroth II operation had been performed. The mean survival time of 16 patients was 14.9 months. Owing to the diffuse type of tumour growth, extensive surgery is recommended as in cases of signet ring cell cancer. The high incidence of small lymph node metastases from this type of tumour should also be taken in account at preoperative staging. Preoperative diagnosis of this tumour subtype is difficult, because histological criteria alone do not allow clear identification. Close cooperation with clinical investigators is necessary, and intraoperative assessment of the tumour – including frozen section of necessary – in particular is of the outmost importance.
    Notes: Zusammenfassung Nach Laurén ist das reine Adenokarzinom des Magens immer nur beim intestinalen Typ zu finden, nach Ming können jedoch selten drüsig differenzierte Magenkarzinome ein diffuses Wachstum zeigen. In einem Zeitraum von 17,5 Jahren beobachteten wir 23 Fälle dieses Tumortyps, dies entspricht 3,6 % aller operierter Magenkarzinome. Makroskopisch diese Tumoren vom Typ III oder IV nach Borrmann; histologisch die Tumoren zumeist gut differenziert, über weite Strecken mit Erhaltung der Magenwandstrukturen, speziell an der Tunica muscularis propria erkenntlich. Ebenso charakteristisch eine ausgeprägte Desmoplasie, v. a. in der Submukosa und Subserosa. In allen Fällen bestand eine karzinomatöse Lymphangiose. Alle bis auf 2 Fälle zeigten metastatisch befallene Lymphknoten, oft bei nur geringer Größe lediglich die Lymphknotensinus infiltriert. Etwa 3/4 der Fälle mit einer Serosainfiltration. Bei den länger beobachteten Patienten fanden sich bilaterale Ovarmetastasen in 4 von 5 beobachteten Patientinnen und ein Tumorrezidiv an der Anastomose in 6 von 9 untersuchten Patienten, die magenreseziert wurden. Bei 16 beobachteten Patienten betrug die mittlere Überlebenszeit 14,9 Monate. Wegen dieses diffusen Wachstums wird klinisch ein gleiches operatives Vorgehen wie für das Siegelringzellkarzinom, speziell beim distal gelegenen Magenkarzinom, empfohlen. Klinisch ist beim präoperativen Staging zu beachten, daß bei diesem Tumortyp häufig kleine Lymphknotenmetastasen vorliegen können. Die präoperative Diagnose dieses Tumorentität ist schwierig, da sie allein auf Basis histologischer Merkmale nicht gestellt werden kann, sie erfordert ein gemeinsames Vorgehen mit der Klinik, der intraoperativen Beurteilung des Tumors, evtl. auch im Schnellschnitt, kommt dabei besondere Bedeutung zu.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Der Radiologe 38 (1998), S. 210-217 
    ISSN: 1432-2102
    Keywords: Key words MR-Angiography • Interventional MRI • Intravascular MRI ; Schlüsselwörter Magnetresonanz-Angiographie • Interventionelle MRT • Intravaskuläre MRT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Obgleich die klinische Umsetzung des Konzeptes der Interventionellen MR-Angiographie noch in weiter Zukunft liegt, sind in den letzten Jahren die technischen Voraussetzungen für die Evaluation eines solchen Konzeptes geschaffen worden. So ermöglichen offene Gerätekonfigurationen einen zunehmend freien Zugang des Untersuchers zum Patienten. Hochleistungsgradientensysteme erlauben die Akquisition von komplexen dreidimensionalen Datensätzen, mit deren Hilfe das arterielle wie auch das venöse Gefäßsystem umfassend dargestellt werden kann. Mit der Entwicklung der MR-Tracking- und MR-Profiling-Methoden stehen nunmehr auch Techniken zur Verfügung, mit deren Hilfe intravaskulär geführte Katheter und Führungsdrähte beinahe in Echtzeit sichtbar gemacht werden können. Diese Übersichtsarbeit beschreibt die technischen Voraussetzungen zur Sichtbarmachung von Kathetern und Führungsdrähten in der MRT-Umgebung und beschreibt die Durchführung erster MRT-gesteuerter Interventionen am Tier sowie am Menschen. Darüber hinaus wird das Potential der intravaskulären Bildgebung zur Charakterisierung arteriosklerotischer Plaquestrukturen beleuchtet.
    Notes: Summary The flow sensitivity inherent to the MR experiment allows for the non-invasive assessment of both the arterial and venous vasculature in any desired plane with good spatial resolution. Data can be acquired in a three-dimensional form, permitting reformating in any plane. In addition, MRI is capable of providing quantitative blood flow information with the use of phase-contrast flow-mapping techniques. Ultrafast gradient echo and echoplanar data acquisition strategies even permit imaging in near-real time. The availability of open MRI configurations now permits one to take advantage of the unique imaging features inherent to MR imaging for the purpose of guidance and control of various intravascular procedures. With the recent development of the MR tracking and MR profiling techniques, permitting visualization of guide-wires and catheters relative to their surroundings in the MR environment in real time, one of the last obstacles to 'Interventional MR angiography' has in effect been overcome. In addition, MR catheters can be modified to acquire high-resolution MR images of the vascular wall, thereby opening vast possibilities regarding characterization of atherosclerotic plaques. This review introduces the underlying techniques for catheter and guide-wire visualization in the MR environment, describes preliminary interventions in animals and humans and discusses the potential of intravascular MRI.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    ISSN: 1432-2218
    Keywords: Key words: Fibrin-coated collagen fleece (Tachocomb) — Endoscopic surgery — Tachocomb application system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Diffuse bleeding from parenchymatous organs or bleeding of the lung both in conventional and endoscopic surgery has to this day been treated with the usual methods — coagulation, tamponade, or oversewing. Methods: With the development by the pharmaceutical industry of a collagen fleece coated with fibrin glue (Tachocomb), an additional method of hemostasis became available. Results: The positive results obtained with the fibrin-coated collagen fleece in conventional surgery encouraged us to employ it when performing endoscopic operations. Especially with laparoscopic cholecystectomies, but also in other endoscopic operations, the application of Tachocomb has proved very successful. Nevertheless, the method of applying Tachocomb was not adequate, and limited its use, which made it necessary for us to develop an application system for endoscopic use. Conclusions: The application system, which consists of a fan as the Tachocomb carrier and a mounting support, worked well during the first tests. In order to confirm this, clinical studies will now be carried out.
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  • 10
    ISSN: 1432-2218
    Keywords: Laparoscopic hernioplasty ; Video-assisted failure analysis ; Reduction of complication and recurrence rates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Studies performed to date show that laparoscopic hernia repair is superior to conventional procedures with regard to postoperative pain, complications, and duration of inability to work. Methods: From August 1, 1992, to February 16, 1995, we performed 245 laparoscopic hernia procedures on 224 patients utilizing a transabdominal preperitoneal polypropylene mesh-plasty (TAPP). Results: We observed in the first 100 patients a total of 21 postoperative complications in 20 patients (21%). We observed 3 hernia occurrences (3%) in this group. Due to careful video documentation of all procedures, retrospective analysis of operative failure was possible. Working on the complications occurring resulted in a modification of the procedure, leading to a standardization of the operative technique and to a rigorous reduction in the number of complications and recurrences. Conclusions: Video-assisted retrospective failure analysis is consequently an effective method to use to optimize the results of minimal invasive hernia repair.
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