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  • 1
    Electronic Resource
    Electronic Resource
    Influence of Parks' anal retractor on anal sphincter pressures (1997)
    Springer
    Diseases of the colon & rectum 40 (1997), S. 1042-1045 
    Details
    ISSN: 1530-0358
    Keywords: Anal manometry ; Hemorrhoidectomy ; Continence disorders
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: The effects of the Parks' anal retractor on anal sphincter function were studied in a prospective, randomized trial. A closed hemorrhoidectomy was performed intraanally in 20 patients using the Parks' anal retractor; in 20 other patients, the procedure was done perineally without the use of a retractor. METHODS: Anal manometry was performed before and at 6 and 12 weeks after hemorrhoidectomy. RESULTS: Mean squeeze pressure decreased by 4 percent whether or not a retractor was used. Mean resting pressure decreased by 23 percent after use of Parks' anal retractor (P=0.01) compared with 8 percent when it was not used (P 〉0,05). CONCLUSIONS: The internal anal sphincter is easily damaged with the use of the Parks' anal retractor. When possible, its use should be avoided to obtain better manometric and functional results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02050926
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Numerical Modeling of a He–N2 Capillary Surface Wave Discharge at Atmospheric Pressure (2000)
    Springer
    Plasma chemistry and plasma processing 20 (2000), S. 183-207 
    Details
    ISSN: 1572-8986
    Keywords: collisional-radiative model ; He–N2 plasma ; Boltzmann equation ; atmospheric pressure plasma ; surface wave
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract A self-consistent steady-state spatially averaged collisional-radiativemodel in which the rate coefficients involving electrons are calculatedfrom the solution to the electron Boltzmann equation has been developedfor describing an atmospheric pressure plasma in helium–nitrogen(He–N2) mixtures. The influence of small nitrogenconcentrations (typically less than 1%) on the discharge characteristicsis studied and compared with available experimental data. It is foundthat nitrogen is highly dissociated and that the density of metastablehelium atoms is considerably reduced by the presence of nitrogen, evenat such low concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007065022725
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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