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  • Chemistry  (2)
  • Category rating  (1)
  • Mesh  (1)
  • 1
    ISSN: 1248-9204
    Keywords: Inguinal hernia ; Plug ; Mesh ; Groin pain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Background The 14 day results of this study reported elsewhere demonstrated that the Perfix® plug-and-patch was as effective as the Lichtenstein patch but not as cost-effective. The present analysis looks at the results at one year to measure quality of life between the two groups. Patients and Methods 141 patients were randomly allocated in a doubleblind manner to receive either a Lichtenstein patch (patch) or a Perfix® plug- and-patch (plug-and-patch) for primary inguinal hernia. Quality of life at 6 months and one year was assessed by the short-form 36 (SF36). On a 3 point scale patients were asked at one year to rate groin, wound and testicular discomfort. Results Physical function by SF36 was similar in the 2 groups at 6 months, but at one year in the patch group (95.11 +/-20.07) was significantly better (p 〈 0.05) than physical function in the plug-and-patch group (82.5 ± 20.98). At one year the number of patients with wound discomfort limiting work or social activities was significantly greater in patients receiving the plug-and-patch (n = 12) compared with patients receiving the patch (n = 4), p 〈 0.031. At one year, 4 of 70 patients receiving the plug-and-patch had required reoperation to remove the preformed plug-and-patch device and replace it with a flat Lichtenstein patch, because of wound pain which was limiting activity. Conclusion A significant proportion of patients suffer chronic pain after placement of a Perfix® plug-and-patch for primary inguinal hernia repair. Removal of the Perfix® device is required in approximately i in 20 patients (5.6% in this series).
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-2649
    Keywords: Category rating ; global scales ; measurement ; quality of life ; visual analogue
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We constructed a new type of global quality of life (QOL) scale deriving from the Borg symptom scales and compared four versions of this new type of scale (H scale) with four category rating (CR) scales and four visual analogue (VA) scales. Mean self-ratings and mean scenario ratings on different scales showed small but significant differences, and intercorrelations were higher amongst the H scales than amongst the CR or VA scales. H scales were on average most preferred (by undergraduates and elderly subjects) followed by CR and lastly VA scales in terms of ease of use and perceived accuracy of representation. We investigated the preferred polarity of the scales: subjects preferred ‘Perfect quality of life’ to be indicated by 20 or 100 (with slight preference for the latter) rather than 0. The H scales have eight additional quantifiers between the end labels and there was good agreement about the perceived magnitude of these quantitiers.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 19 (1992), S. 139-144 
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: In the smelting of aluminium, HF fumes are produced that are subsequently trapped by absorption onto alumina. The factors that affect the adsorption capacity of alumina have been studied previously and are well established, but the mechanism by which HF adsorbs onto the alumina surface is not well understood.In this study, x-ray photoelectron spectroscopy (XPS) was used to investigate the nature of the surface adsorption of HF on alumina. XPS is particularly well suited to the study of this type of gas adsorption process.Laboratory-prepared samples were studied with particular interest in evidence for Al—F bonding, or in fluoride species formed by reaction with —OH or —O. Also of interest was the role of sodium, since it is segregated to the surface of the alumina during calcination.Al—F bonding was observed on only one sample type. An Al—F interaction was identified when the alumina had been predried and dry HF was absorbed. When moisture was present no AlF3 formation was observed. This suggests that under conventional conditions (i.e. moisture present) the adsorption of HF involves a weak interaction, probably hydrogen bonding, with intermediate layers of water. After heating the samples containing weakly bound HF to 500°C, no Al—F interaction was observed. Much of the HF was desorbed at 700°C.An Na-F interaction was observed in all fluoride-adsorbed samples; however, this can only account for a small proportion of the total fluoride adsorbed.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 12 (1988), S. 443-444 
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Type of Medium: Electronic Resource
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