Jo Kramer-Johansen

Summary

Affiliation: University of Oslo
Country: Norway

Publications

  1. pmc Development of the probability of return of spontaneous circulation in intervals without chest compressions during out-of-hospital cardiac arrest: an observational study
    Kenneth Gundersen
    Department of Electrical and Computing Engineering, University of Stavanger, Stavanger, Norway
    BMC Med 7:6. 2009
  2. ncbi request reprint Transthoracic impedance changes as a tool to detect malpositioned tracheal tubes
    Jo Kramer-Johansen
    Institute for Experimental Medical Research, Ulleval University Hospital, N 0407 Oslo, Norway
    Resuscitation 76:11-6. 2008
  3. doi request reprint Mechanical chest compressions with trapezoidal waveform improve haemodynamics during cardiac arrest
    Jo Kramer-Johansen
    Institute for Experimental Medical Research, Oslo University Hospital, Oslo, Norway
    Resuscitation 82:213-8. 2011
  4. ncbi request reprint Detection of carbon dioxide in expired air after oesophageal intubation; the role of bystander mouth-to-mouth ventilation
    J Kramer-Johansen
    Institute for Experimental Medical Research and Pre Hospital Division, Ulleval University Hospital, Oslo, Norway
    Acta Anaesthesiol Scand 52:155-7. 2008
  5. ncbi request reprint Advanced cardiac life support before and after tracheal intubation--direct measurements of quality
    Jo Kramer-Johansen
    Institute for Experimental Medical Research, University of Oslo, Ulleval University Hospital, N 0407 Oslo, Norway
    Resuscitation 68:61-9. 2006
  6. ncbi request reprint Uniform reporting of measured quality of cardiopulmonary resuscitation (CPR)
    Jo Kramer-Johansen
    Institute for Experimental Medical Research, Ullevaal University Hospital, N 0407 Oslo, Norway
    Resuscitation 74:406-17. 2007
  7. ncbi request reprint Pauses in chest compression and inappropriate shocks: a comparison of manual and semi-automatic defibrillation attempts
    Jo Kramer-Johansen
    Institute for Experimental Medical Research, Ullevaal University Hospital, N 0407 Oslo, Norway
    Resuscitation 73:212-20. 2007
  8. ncbi request reprint Quality of out-of-hospital cardiopulmonary resuscitation with real time automated feedback: a prospective interventional study
    Jo Kramer-Johansen
    Institute for Experimental Medical Research, University of Oslo, N 0407 Oslo, Norway
    Resuscitation 71:283-92. 2006
  9. ncbi request reprint Quality of cardiopulmonary resuscitation during out-of-hospital cardiac arrest
    Lars Wik
    National Competence Center for Emergency Medicine, Ulleval University Hospital, Oslo, Norway
    JAMA 293:299-304. 2005
  10. ncbi request reprint A failed attempt to improve quality of out-of-hospital CPR through performance evaluation
    Theresa Mariero Olasveengen
    Institute for Experimental Medical Research, Ulleval University Hospital, Oslo, Norway
    Prehosp Emerg Care 11:427-33. 2007

Detail Information

Publications34

  1. pmc Development of the probability of return of spontaneous circulation in intervals without chest compressions during out-of-hospital cardiac arrest: an observational study
    Kenneth Gundersen
    Department of Electrical and Computing Engineering, University of Stavanger, Stavanger, Norway
    BMC Med 7:6. 2009
    ..We have used this in the current study to quantify in detail the effects of interrupting chest compressions...
  2. ncbi request reprint Transthoracic impedance changes as a tool to detect malpositioned tracheal tubes
    Jo Kramer-Johansen
    Institute for Experimental Medical Research, Ulleval University Hospital, N 0407 Oslo, Norway
    Resuscitation 76:11-6. 2008
    ..We wanted to test the ability of impedance changes as measured across the chest via the standard defibrillation pads to distinguish between oesophageal and tracheal ventilations in non-circulated patients...
  3. doi request reprint Mechanical chest compressions with trapezoidal waveform improve haemodynamics during cardiac arrest
    Jo Kramer-Johansen
    Institute for Experimental Medical Research, Oslo University Hospital, Oslo, Norway
    Resuscitation 82:213-8. 2011
    ..We studied the haemodynamic differences of such waveforms in a porcine model of cardiac arrest...
  4. ncbi request reprint Detection of carbon dioxide in expired air after oesophageal intubation; the role of bystander mouth-to-mouth ventilation
    J Kramer-Johansen
    Institute for Experimental Medical Research and Pre Hospital Division, Ulleval University Hospital, Oslo, Norway
    Acta Anaesthesiol Scand 52:155-7. 2008
    ..Both patients had received bystander cardiopulmonary resuscitation with mouth-to-mouth ventilation, and the CO2 from the rescuers' expired air was trapped and subsequently detected after oesophageal intubation...
  5. ncbi request reprint Advanced cardiac life support before and after tracheal intubation--direct measurements of quality
    Jo Kramer-Johansen
    Institute for Experimental Medical Research, University of Oslo, Ulleval University Hospital, N 0407 Oslo, Norway
    Resuscitation 68:61-9. 2006
    ..Tracheal intubation should improve the quality of cardiopulmonary resuscitation (CPR) by enabling adequate ventilation without pauses in external chest compressions...
  6. ncbi request reprint Uniform reporting of measured quality of cardiopulmonary resuscitation (CPR)
    Jo Kramer-Johansen
    Institute for Experimental Medical Research, Ullevaal University Hospital, N 0407 Oslo, Norway
    Resuscitation 74:406-17. 2007
    ..This will allow for meaningful comparisons between treatment groups in clinical trials as well as a common system for quality improvement and documentation of this improvement...
  7. ncbi request reprint Pauses in chest compression and inappropriate shocks: a comparison of manual and semi-automatic defibrillation attempts
    Jo Kramer-Johansen
    Institute for Experimental Medical Research, Ullevaal University Hospital, N 0407 Oslo, Norway
    Resuscitation 73:212-20. 2007
    ..We hypothesised that pauses are shorter for manual defibrillation by trained rescuers, but with an increased number of inappropriate shocks given for a non-VF/VT rhythm...
  8. ncbi request reprint Quality of out-of-hospital cardiopulmonary resuscitation with real time automated feedback: a prospective interventional study
    Jo Kramer-Johansen
    Institute for Experimental Medical Research, University of Oslo, N 0407 Oslo, Norway
    Resuscitation 71:283-92. 2006
    ..To compare quality of CPR during out-of-hospital cardiac arrest with and without automated feedback...
  9. ncbi request reprint Quality of cardiopulmonary resuscitation during out-of-hospital cardiac arrest
    Lars Wik
    National Competence Center for Emergency Medicine, Ulleval University Hospital, Oslo, Norway
    JAMA 293:299-304. 2005
    ..There is little information on adherence to these guidelines during advanced cardiac life support in the field...
  10. ncbi request reprint A failed attempt to improve quality of out-of-hospital CPR through performance evaluation
    Theresa Mariero Olasveengen
    Institute for Experimental Medical Research, Ulleval University Hospital, Oslo, Norway
    Prehosp Emerg Care 11:427-33. 2007
    ..Our hypothesis was that providing CPR performance evaluation (CPR-PE) to three ambulance services would facilitate local education and implementation of CPR guidelines and, consequently, improve CPR quality...
  11. ncbi request reprint Arterial blood gases during basic life support of human cardiac arrest victims
    Morten Pytte
    Institute for Experimental Medical Research and Department of Anaesthesiology, Ulleval University Hospital, Kirkeveien 166, N 0407 Oslo, Norway
    Resuscitation 77:35-8. 2008
    ..Ventilation with tidal volumes sufficient to raise the victim's chest is an integral part of guidelines for lay-rescuer basic life support, but optimal tidal volume, frequency and ratio to chest compressions are not known...
  12. ncbi request reprint Haemodynamic effects of adrenaline (epinephrine) depend on chest compression quality during cardiopulmonary resuscitation in pigs
    Morten Pytte
    Department of Anaesthesiology, Ulleval University Hospital, Oslo, Norway
    Resuscitation 71:369-78. 2006
    ..We have studied the haemodynamic effects of adrenaline during CPR with good laboratory quality and with quality simulating clinical findings and the feasibility of monitoring these effects through VF waveform analysis...
  13. doi request reprint A randomized trial of the capability of elderly lay persons to perform chest compression only CPR versus standard 30:2 CPR
    Andres Neset
    Institute for Experimental Medical Research, Oslo University Hospital Ulleval, Kirkeveien 166, Oslo, Norway
    Resuscitation 81:887-92. 2010
    ..We wanted to study if elderly lay persons could perform 10min of CPR on a realistic manikin with continuous chest compressions (CCC) and conventional CPR (30:2)...
  14. doi request reprint Prearrest administration of low-molecular-weight heparin in porcine cardiac arrest: hemodynamic effects and resuscitability
    Morten Pytte
    Institute for Experimental Medical Research and Department of Anesthesiology, Ulleval University Hospital, Oslo, Norway
    Crit Care Med 36:881-6. 2008
    ..We studied the hemodynamic effects of prearrest anticoagulation with a low-molecular-weight heparin suitable for clinical use during cardiopulmonary resuscitation in pigs...
  15. ncbi request reprint Chest compressions by ambulance personnel on chests with variable stiffness: abilities and attitudes
    Silje Ødegaard
    University of Oslo, Faculty Division Ulleval University Hospital, N 0407 Oslo, Norway
    Resuscitation 74:127-34. 2007
    ..Quality of cardiopulmonary resuscitation (CPR) performed by professionals is reported to be substandard even with automated corrective feedback. We hypothesised that lack of quality is not due to physical capabilities...
  16. ncbi request reprint Is CPR quality improving? A retrospective study of out-of-hospital cardiac arrest
    Theresa M Olasveengen
    Institute for Experimental Medical Research, Ulleval University Hospital, University of Oslo, N 0407 Oslo, Norway
    Resuscitation 75:260-6. 2007
    ..To evaluate the quality of cardiopulmonary resuscitation (CPR) performed by a physician-manned ambulance, and assess whether it changed with time influenced by developing scientific evidence and guideline changes...
  17. doi request reprint The effect of transport on quality of cardiopulmonary resuscitation in out-of-hospital cardiac arrest
    Silje Ødegaard
    Institute for Experimental Medical Research, Ulleval University Hospital, N 0407 Oslo, Norway
    Resuscitation 80:843-8. 2009
    ....
  18. doi request reprint Improving cardiopulmonary resuscitation quality to ensure survival
    Petter Andreas Steen
    University of Oslo, University Division UUS and Division of Prehospital Services, Norway
    Curr Opin Crit Care 14:299-304. 2008
    ..The effects of cardiopulmonary resuscitation quality factors on patient survival are presently under scrutiny...
  19. doi request reprint Time used for ventilation in two-rescuer CPR with a bag-valve-mask device during out-of-hospital cardiac arrest
    Silje Odegaard
    Institute for Experimental Medical Research, Ulleval University Hospital, N 0407 Oslo, Norway
    Resuscitation 77:57-62. 2008
    ....
  20. pmc Time delays and capability of elderly to activate speaker function for continuous telephone CPR
    Tonje S Birkenes
    Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Nydalen, Oslo, Norway
    Scand J Trauma Resusc Emerg Med 21:40. 2013
    ..They often have speaker function which further allows the rescuer to receive instructions while performing CPR.We wanted to measure adult lay people's ability to activate the speaker function on their own mobile phone...
  21. ncbi request reprint A method to remove CPR artefacts from human ECG using only the recorded ECG
    Sofia Ruiz de Gauna
    Department of Electronics and Telecommunications, University of the Basque Country, Alameda de Urquijo s n, 48013 Bilbao, Spain
    Resuscitation 76:271-8. 2008
    ..To show the possibility of using cardiopulmonary resuscitation (CPR) artefact suppression methods that do not need additional reference signals to model CPR artefacts...
  22. ncbi request reprint Prediction of countershock success using single features from multiple ventricular fibrillation frequency bands and feature combinations using neural networks
    Andreas Neurauter
    Department of Anaesthesiology and Critical Care Medicine, Innsbruck Medical University, Innsbruck, Austria
    Resuscitation 73:253-63. 2007
    ..This may indicate that various simple VF features, such as median slope already reach the maximum prediction power extractable from VF ECG...
  23. ncbi request reprint Predicting survival with good neurologic recovery at hospital admission after successful resuscitation of out-of-hospital cardiac arrest: the OHCA score
    Kjetil Sunde
    Eur Heart J 28:773; author reply 773-4. 2007
  24. ncbi request reprint Reducing no flow times during automated external defibrillation
    Joar Eilevstjønn
    Laerdal Medical AS, P O Box 377, N 4002 Stavanger, Norway
    Resuscitation 67:95-101. 2005
    ..By introducing the proposed methods into an AED, the NFT would be significantly reduced, hopefully increasing the survival...
  25. doi request reprint Using within-patient correlation to improve the accuracy of shock outcome prediction for cardiac arrest
    Kenneth Gundersen
    Department of Electrical and Computing Engineering, University of Stavanger, Stavanger, Norway
    Resuscitation 78:46-51. 2008
    ..The accuracy of such methods determines how useful it is clinically and for retrospective analysis...
  26. ncbi request reprint Estimation of the duration of ventricular fibrillation using ECG single feature analysis
    Andreas Neurauter
    Department of Anaesthesiology and Critical Care Medicine, Innsbruck Medical University, Anichstrasse 35, 6020 Innsbruck, Austria
    Resuscitation 73:246-52. 2007
    ..No significant correlation (p<.05) between any of the VF ECG features and downtime could be found. The duration of cardiac arrest could not be estimated reliably from human VF ECG single feature analysis...
  27. ncbi request reprint Effects of compression depth and pre-shock pauses predict defibrillation failure during cardiac arrest
    Dana P Edelson
    Section of General Internal Medicine, University of Chicago Hospitals, Chicago, IL 60637, United States
    Resuscitation 71:137-45. 2006
    ..Specifically, the clinical effects of compression depth and pauses in chest compression prior to defibrillation (pre-shock pauses) are unknown...
  28. doi request reprint Dynamics and state transitions during resuscitation in out-of-hospital cardiac arrest
    Eirik Skogvoll
    Unit for Applied Clinical Research, Faculty of Medicine, Norwegian University of Science and Technology NTNU, Norway
    Resuscitation 78:30-7. 2008
    ..g. PEA-->ASY) or by intervention (e.g. VF-->ASY after DC shock); temporary ROSC may also occur. To gain insight into the dynamics of this process, we analyzed the state transitions over time using real-life data...
  29. ncbi request reprint Shock outcome is related to prior rhythm and duration of ventricular fibrillation
    Joar Eilevstjønn
    Laerdal Medical AS, P O Box 377, N 4002 Stavanger, Norway
    Resuscitation 75:60-7. 2007
    ..We also analysed how these factors relate to the VF analysis feature median slope...
  30. ncbi request reprint Identifying approaches to improve the accuracy of shock outcome prediction for out-of-hospital cardiac arrest
    Kenneth Gundersen
    Department of Electrical and Computing Engineering, University of Stavanger, Stavanger, Norway
    Resuscitation 76:279-84. 2008
    ..The accuracy of such methods determines how useful it is clinically and for retrospective analysis...
  31. ncbi request reprint Independent evaluation of a defibrillation outcome predictor for out-of-hospital cardiac arrested patients
    Trygve Eftestøl
    University of Stavanger, Faculty of Science and Technology, Department of Electrical and Computer Engineering, N 4036 Stavanger, Norway
    Resuscitation 67:55-61. 2005
    ..As in the present study, future testing should be performed on totally independent data not included in the design of the outcome predictor to get a reliable impression of expected performance...
  32. doi request reprint Automatic identification of return of spontaneous circulation during cardiopulmonary resuscitation
    Martin Risdal
    Department of Electrical and Computer Engineering, University of Stavanger, Stavanger 4036, Norway
    IEEE Trans Biomed Eng 55:60-8. 2008
    ..5% of the normal pulse rhythm segments. Automatic identification of pulse could avoid unnecessary pulse checks and thereby reduce no-flow time and potentially increase the chance of survival...
  33. ncbi request reprint Reconfirmation algorithms should be the standard of care in automated external defibrillators
    Jo Kramer-Johansen
    Resuscitation 70:474-5; author reply 475. 2006
  34. ncbi request reprint Predicting outcome after cardiac arrest: two caveats
    Jo Kramer-Johansen
    Resuscitation 66:108-9; author reply 109-10. 2005