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  • 1995-1999  (2)
  • CARBIDE DISSOLUTION  (1)
  • Key words: Ventriculoperitoneal shunts — Laparoscopy — Ventricle decompression  (1)
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Years
  • 1995-1999  (2)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Factors Affecting Chromium Carbide Precipitate Dissolution During Alloy Oxidation (1998)
    Springer
    Oxidation of metals 50 (1998), S. 139-165 
    Details
    ISSN: 1573-4889
    Keywords: IRON BASE ALLOYS ; MULTIPHASE ALLOY OXIDATION ; RESERVOIR EFFECT ; CARBIDE DISSOLUTION
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Ferrous alloys containing significant volumefractions of chromium carbides were formulated so as tocontain an overall chromium level of 15% (by weight) buta nominal metal matrix chromium concentration of only 11%. Their oxidation at 850°C inpure oxygen led to either protectiveCr2O3 scale formation accompaniedby subsurface carbide dissolution or rapid growth ofiron-rich oxide scales associated with rapid alloy surface recession, which engulfedthe carbides before they could dissolve. Carbide sizewas important in austenitic alloys: an as-castFe-15Cr-0.5C alloy contained relatively coarse carbides and failed to form aCr2O3 scale, whereas the samealloy when hot-forged to produce very fine carbidesoxidized protectively. In ferritic alloys, however, evencoarse carbides dissolved sufficiently rapidly to provide the chromium flux necessary to formand maintain the growth of a Cr2O3scale, a result attributed to the high diffusivity ofthe ferrite phase. Small additions of silicon to theas-cast Fe-15Cr-0.5C alloy rendered it ferritic and led toprotective Cr2O3 growth. However,when the silicon-containing alloy was made austenitic(by the addition of nickel), it still formed aprotective Cr2O3 scale, showing that the principal function of silicon was inmodifying the scale-alloy interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018880019395
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A retrospective analysis of laparoscopically assisted ventriculoperitoneal shunts (1996)
    Springer
    Surgical endoscopy and other interventional techniques 10 (1996), S. 311-313 
    Details
    ISSN: 1432-2218
    Keywords: Key words: Ventriculoperitoneal shunts — Laparoscopy — Ventricle decompression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: During the last two years, laparoscopy has been utilized to facilitate the rapid, safe and direct placement of the abdominal component of ventriculoperitoneal shunts. This study was undertaken to review the feasibility, benefits, technique, and clinical application of laparoscopically assisted ventriculoperitoneal (LAVP) shunt placement. Methods: A retrospective analysis of the records of six patients who underwent LAVP shunt placement was undertaken. The sex, age, technique, indication for surgery, co-morbid conditions, complications operative time, results, and mortality were noted. Results: All patients underwent successful shunt placement. This included placement in the face of previous abdominal surgery, including a percutaneous gastrostomy. The one major complication, hemothorax, was not associated with the laparoscopic portion of the procedure. Conclusions: Using basic laparoscopic skills and nonspecialized equipment, laparoscopic assistance in ventriculoperitoneal shunt placement offers easy, direct placement of the intraabdominal portion of the catheter in most situations and provides definite patient benefits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004649910048
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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