• Der Anaesthesist · Aug 1991

    Comparative Study

    [Inspiratory and expiratory resistance of 8 semi-closed circle systems].

    • P Feigenwinter and A M Zbinden.
    • Abteilung Forschung, Universitätsspital Bern.
    • Anaesthesist. 1991 Aug 1;40(8):441-5.

    AbstractThe resistance of a circle system is an important factor that determines the respiratory effort of the patient. The inspiratory and expiratory resistances were measured in eight semi-closed circle systems used in Europe: Dräger Cicero, Dräger 8 ISO, Dräger AV1, Ohmeda Modulus II Plus, Gambro Engström Elsa, Siemens Servo Ventilator 900 D with circle system 985, Siemens Ventilator 710, and Megamed 700A with circle system 219. The measurements were all performed in the position "spontaneous breathing" according to a new proposal of the CEN (Comité Européen de Normalisation). The following circle systems exceeded the proposed limit of 0.6 kPa at a gas flow of 60 l/min (with CO2-Absorber): Dräger AV1 in expiration and Siemens Servo Ventilator in both expiration and inspiration. The expiratory resistance was also determined by using intermittent flows. The results differed, as the expiratory gas flow can be influenced by the falling or rising ventilator bellows. The authors conclude that considerable differences exist between various breathing systems and that not all systems can be recommended for use in patients with limited breathing force, such as small children.

      Pubmed     Copy Citation     Plaintext  

      Add institutional full text...

    Notes

     
    Knowledge, pearl, summary or comment to share?
    300 characters remaining
    help        
    You can also include formatting, links, images and footnotes in your notes
    • Simple formatting can be added to notes, such as *italics*, _underline_ or **bold**.
    • Superscript can be denoted by <sup>text</sup> and subscript <sub>text</sub>.
    • Numbered or bulleted lists can be created using either numbered lines 1. 2. 3., hyphens - or asterisks *.
    • Links can be included with: [my link to pubmed](http://pubmed.com)
    • Images can be included with: ![alt text](https://bestmedicaljournal.com/study_graph.jpg "Image Title Text")
    • For footnotes use [^1](This is a footnote.) inline.
    • Or use an inline reference [^1] to refer to a longer footnote elseweher in the document [^1]: This is a long footnote..

    hide…

What will the 'Medical Journal of You' look like?

Start your free 21 day trial now.

We guarantee your privacy. Your email address will not be shared.