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  • Articles: DFG German National Licenses  (2)
  • 31P-NMR spectroscopy  (1)
  • Triangle paralaxis  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Surgical endoscopy and other interventional techniques 10 (1996), S. 804-808 
    ISSN: 1432-2218
    Keywords: Triangle paralaxis ; Camera control ; Teleoperating ; Operative endoscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: The triangle paralaxis method for camera control in teleoperating is presented. Methods: For orientation in the 3D space of the corporic cavity there are three points necessary for the creation of the paralaxis triangle. This triangle is then imagined and compared with topography during surgery. The first and second points are created in one's mind at the locus of the entry of the instruments into the viewing field of the camera. The third apex of the triangle is the area of dissection—the point in which the instruments converge. The fourth point to be viewed determines the course of dissection. Triangle paralaxis may be applied in dissection with only one instrument as well as in the zooming technique, closely viewing a part of the dissecting instrument. Results: Using this technique a 7.78% rate of conversion and 2.15% rate of reoperation could be achieved in 334 evaluated laparoscopic cholecystectomies performed in a small public hospital. Conclusions: Triangle paralaxis seems to be a simple method for ensuring an optimal camera view during laparoscopic surgery.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 375 (1990), S. 205-207 
    ISSN: 1435-2451
    Keywords: Proximal selective vagotomy ; Metabolism of the gastric wall ; 31P-NMR spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Im Experiment wurde der Einfluß der SPV auf den Phosphatmetabolismus der Magenwand bei Ratten mittels 31P-NMR Spektroskopie untersucht. Die SPV bewirkt unmittelbar nach der Operation eine Destruktion des Stoffwechsels der Magenwandzellen. Vier Tage nch der SPV kommt es zur Regeneration des Metabolismus. Eine Woche nach der Operation ist die funktionelle Zellregeneration abgeschlossen, der Stoffwechsel aber verlangsamt. Dies hat eine reduzierte Produktion von S`aure und Schutzfaktoren der Magenschleimhaut zur Folge. Experimentelle Läasionen der Magenschleimhaut durch Phenylbutazon bewirken ebenso eine Zerstörung des Stoffwechsels der Magenwandzellen bis zum kompletten Zelluntergang.
    Notes: Summary The phosphate metabolism of the gastric wall after proximal selective vagotomy (PSV) was investigated by means of 31P-NMR spectroscopy. The destruction of metabolism has been found just after PSV resulting in a significant decrease of adenosine diphosphates and adenosine triphosphates. 4 and 7 days after PSV the progress of metabolism regeneration was detected, nevertheless with the retardation of high energy phosphates ischemic degradation. The results indicate not only a hydrochloric acid activity reduction but diminution of gastric mucosa protective factors, too. In experimental gastric ulcers no energy phosphates have been found suggesting a mucosa cells necrobiosis.
    Type of Medium: Electronic Resource
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