Bjerre, Troels

Sørup, Christian Michel

Torngård, Jens Peter

Online Research Database In Technology

                       General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.  • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal   If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.     Downloaded from orbit.dtu.dk on: Dec 17, 2017Relevance of Measurement of Electrode Impedance following the Standard ANSI/AAMIDF80-2003Torngård, Jens Peter ; Bjerre, Troels ; Sørup, Christian MichelPublication date:2007Link back to DTU OrbitCitation (APA):Torngård, J. P., Bjerre, T., & Sørup, C. M. (2007). Relevance of Measurement of Electrode Impedance followingthe Standard ANSI/AAMI DF80-2003. Abstract from 1. Landsmøde i Dansk Medicoteknisk Selskab, Hellerup,Denmark. SKABELON Foredragskonkurrence   1. Landsmøde i Dansk Medicoteknisk Selskab 19 - 20. september 2007  Forfatter/Kontakt person: Medicoteknisk Chef Jens Peter Torngård Adresse:  Medico-Teknisk Afsnit, Gentofte hospital, Niels Andersensvej 65, opg. 40 I, 2900 Hellerup. Tlf. nr.: 39 77 35 41 E-mail: mta@geh.regionh.dk  Skriv abstrakt i testruden: Alle forfattere skal anføres; foredragsholderen skal understreges, max 200 ord: JENS PETER TORNGÅRD, TROELS BJERRE & CHRISTIAN M. SØRUP.  Biomedical Dept., Gentofte Hospital, Univ. of Copenhagen and  DTU, Tecnical Univ. of Denmark.  Relevance of Measurement of Electrode Impedance following the Standard ANSI/AAMI DF80-2003.  Measuring impedances with defibrillator-electrodes mounted ’gel-to-gel’, fol-lowing the standard ANSI/AAMI-DF80-2003, are not representative for the impedances during discharge, with the electrodes applied to skin. For a comparative study of 2 brands of Defi-Pads a pork-loin with rind was choosen as a sufficient substitute for a patient. With four Defi-pad-positions on the skin-side, a protocol was followed, using ’paired tests’ to reduce the influ-ence of position, drying over time, changes in the defibrillator over time and changes in the skin due to discharges. The pork-loin skin-side was wiped with towels and air-dried 40 minutes. 28 Bi-Phasic discharges of 100 Joule was given, using a Medtronic Lifepak 20 defibrillator, which measures the impedance during discharge. For each of the first 12 discharges, electrodes and position was changed. The following 16 was given in series of 4 between changes. The impedances measured 170-220 Ohm, Fig. 1.  With SD=3,8 Ohm, significance >99,95% (omitting one pair), the difference between the brands was 17 Ohm average, dissipating 20% of the energy with a normal patientimpedance of 70-80 Ohm. This is not recognized from the ’AC Large-Signal-Impedance’ of 1,1 Ohm for both brands, following  ANSI/AAMI-DF80-2003.                 Fig. 1 Abstrakt sendes til: gert.kokholm@tdcadsl.dk inden den 1. august 2007 Svar vedrørende eventuel deltagelse i konkurrencen udsendes senest den 20. august 2007 Impedance during Discharge, Product A & B0501001502002501 2 3 4 5 6 7 8 9 10 11 12 13a 13b 13c 13d 14a 14b 14c 14d 15a 15b 15c 15d 16a 16b 16c 16dTest NoOhmBBaamiAaamiAomitBomitA

Relevance of Measurement of Electrode Impedance following the Standard ANSI/AAMI DF80-2003

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Relevance of Measurement of Electrode Impedance following the Standard ANSI/AAMI DF80-2003

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