Michael Frass

Michael Frass (born 1954, Vienna) is an Austrian medicine specialist for internal medicine and professor at the Medical University of Vienna (MUW). He is known for his work on homeopathy and his inventions in the field of airway management.

Michael Frass
Known forHomeopathy and Combitube
AwardsLifetime Achievement Award, Society for Airway Management (2011)
Scientific career
InstitutionsMedical University of Vienna


He is First Chairman of the Scientific Society for Homeopathy (WissHom),[1] founded in 2010, president of the Umbrella organization of Austrian Doctors for Holistic Medicine,[2] since 2002 and since 1994 Vicepresident of the Doctors Association for Classical Homeopathy.[3] Frass is the inventor of the Combitube, an emergency airway allowing blind insertion used in the pre-hospital and emergency setting.[4] Frass holds several patents and registered designs.

Homoeopathic researchEdit

A major interest of Frass is homeopathy according to Hahnemann.[5] He has published several papers on this subject,[6][7] in addition, he has edited a text book Homeopathy in Intensive- Care and Emergency Medicine together with Martin Bündner.[8]

Article in the OncologistEdit

In 2020 Frass published an article[9] in the scientific journal The Oncologist. The results of the article were discussed outside of academic circles for example in the Wiener Zeitung.[10] After criticism (for example from the Informationsnetzwerk Homöopathie[11]), the Austrian Agency for Scientific Integrity (Österreichische Agentur für wissenschaftliche Integrität) concluded that the article contains data manipulation and forgery.[12][13]


He has also published several papers investigating the influence of controlled mechanical ventilation on the release of atrial natriuretic peptide.[14][15][16] Furthermore, Frass has investigated devices designed for securing the airway under emergency conditions. He has performed studies on a broad range of different alternate airways.[17][18][19][20][21][22][23]


Rapid assessment and management of respiratory structure and function are imperative in emergency intubation.[24] Endotracheal intubation remains the gold standard in airway maintenance. However, endotracheal intubation may be impossible due to difficult circumstances with respect to space and illumination or anatomy even for skilled physicians. Therefore, the need arises for a simple and efficient alternative. The Combitube was designed with this goal in mind.[25][26][27]

Frass is the inventor of the Combitube, a twin lumen device designed for use in emergency situations and difficult airways. He has published several papers on this topic.[28]


  1. ^ "Scientific Society for Homeopathy!". wisshom.de. Retrieved 20 May 2021.
  2. ^ "Österreichischer Dachverband für ärztliche Ganzheitsmedizin". ganzheitsmed.at (in German). Retrieved 20 May 2021.
  3. ^ "Ärztegesellschaft für klassische Homöopathie". aekh.at (in German). Retrieved 20 May 2021.
  4. ^ Frass, Michael (September 2012). Esophageal-Tracheal Double-Lumen Airways: The Combitube and EasyTube (Third Edition, 2013 ed.). Elsevier Inc. pp. 569–591, 916–954. ISBN 9781437727647. Retrieved 20 May 2021.
  5. ^ Samuel Hahnemann: Organon of Medicine. 6th Edition. Gazelle Distribution Trade. 2009.
  6. ^ Frass M, Dielacher C, Linkesch M, Endler C, Muchitsch I, Schuster E, Kaye A. Influence of potassium dichromate on tracheal secretions in critically ill patients. Chest 2005; 127:936-41.
  7. ^ Frass M, Linkesch M, Banyai S, Resch G, Dielacher C, Löbl T, Endler C, Haidvogl M, Muchitsch I, Schuster E. Adjunctive homeopathic treatment in patients with severe sepsis: a randomized, double-blind, placebo-controlled trial in an intensive care unit. Homeopathy 2005; 94:75-80.
  8. ^ Michael Frass, Martin Bündner (Hrsg.): Homöopathie in der Intensiv- und Notfallmedizin. Elsevier, Urban & Fischer, 2007.
  9. ^ Michael Frass, Peter Lechleitner, Christa Gründling, Claudia Pirker, Erwin Grasmuk-Siegl, Julian Domayer, Maximilian Hochmair, Katharina Gaertner, Cornelia Duscheck, Ilse Muchitsch, Christine Marosi, Michael Schumacher, Sabine Zöchbauer-Müller, Raj K. Manchanda, Andrea Schrott, Otto Burghuber (2020-12-01), "Homeopathic Treatment as an Add-On Therapy May Improve Quality of Life and Prolong Survival in Patients with Non-Small Cell Lung Cancer: A Prospective, Randomized, Placebo-Controlled, Double-Blind, Three-Arm, Multicenter Study", The Oncologist (in German), vol. 25, no. 12, pp. e1930–e1955, doi:10.1002/onco.13548, ISSN 1083-7159, PMC 8108047, PMID 33010094{{citation}}: CS1 maint: multiple names: authors list (link)
  10. ^ Alexandra Grass. "Komplementärmedizin - Studie sieht verbesserte Lebensqualität bei Lungenkrebs" (in German). Retrieved 2022-11-20.
  11. ^ INH-Team (2022-11-03). "Verbesserungen beim Überleben von Lungenkrebspatienten mit homöopathischer Komplementärbehandlung (Frass et al. 2020) – Pressemitteilung des INH (31.10. / 03.11.2022)". Informationsnetzwerk Homöopathie (in German). Retrieved 2022-11-20.
  12. ^ Christian Kreil (2022-11-08). "Homöopathie: Wie gehabt, eine neue Mogelei" (in Austrian German). Der Standard. Retrieved 2022-11-20.
  13. ^ Alwin Schoenberger (2022-10-28). "Homöopathie bei Krebspatienten: Fast zu schön, um wahr zu sein" (in German). Profil. Retrieved 2022-11-20.
  14. ^ Frass M, Watschinger B, Traindl O, Popovic R, Podolsky A, Gisslinger H, Falger S, Goldin M, Schuster E, Leithner C. "Atrial natriuretic peptide release in response to different positive end-expiratory pressure levels". Crit Care Med 1993;21:343-7.
  15. ^ Frass M, Popovic R, Hartter E, Auinger C, Woloszczuk W, Leithner C. "Atrial natriuretic peptide decrease during spontaneous breathing with continuous positive airway pressure in volume-expanded healthy volunteers". Crit Care Med 1988;16:831-5.
  16. ^ Leithner C, Frass M, Pacher R, Hartter E, Pesl H, Woloszczuk W. Mechanical ventilation with positive end-expiratory pressure decreases release of alpha-atrial natriuretic peptide. Crit Care Med 1987;15:484-8.
  17. ^ Rabitsch W, Köstler WJ, Burgmann H, Krafft P, Frass M. Recommendation of the minimal volume technique to avoid tongue engorgement with prolonged use of the esophageal-tracheal combitube. Ann Emerg Med 2005;45:565-6.
  18. ^ Schaumann N, Lorenz V, Schellongowski P, Staudinger T, Locker GJ, Burgmann H, Pikula B, Hofbauer R, Schuster E, Frass M. Evaluation of Seldinger Technique Emergency Cricothyroidotomy versus Standard Surgical Cricothyroidotomy in 200 Cadavers. Anesthesiology 2005;102:7-11 IF 4,055 Top Anesthesiology.
  19. ^ Rabitsch W, Kostler WJ, Fiebiger W, Dielacher C, Losert H, Sherif C, Staudinger T, Seper E, Koller W, Daxböck F, Schuster E, Knöbl P, Burgmann H, Frass M. Closed suctioning system reduces cross-contamination between bronchial system and gastric juices. Anesth Analg. 2004 Sep;99(3):886-92.
  20. ^ Philip Eisenburger, Klaus Laczika, Michaela List, Astrid Wilfing, Heidrun Losert, Roland Hofbauer, Heinz Burgmann, Hans Bankl, Branko Pikula, Jonathan L. Benumof, Michael Frass: Comparison of Conventional Surgical versus Seldinger Technique Emergency Cricothyrotomy performed by Inexperienced Clinicians. Anesthesiology 2000; 92:687-90.
  21. ^ Knapp S, Kofler J, Stoiser B, Thalhammer F, Burgmann H, Posch M, Hofbauer R, Stanzel M, Frass M: The assessment of four different methods to verify tracheal tube placement in the critical care setting. Anesth Analg 1999; 88:766-70.
  22. ^ Ruetzler K, Roessler B, Potura L, Priemayr A, Robak O, Schuster E, Frass M. Performance and skill retention of intubation by paramedics using seven different airway devices--a manikin study. Resuscitation 2011;82:593-7.
  23. ^ Robak O, Leonardelli M, Zedtwitz-Liebenstein K, Rützler K, Schuster E, Vaida S, Salem R, Frass M. Feasibility and speed of insertion of seven supraglottic airway devices under simulated airway conditions. CJEM 2012;14:330-4.
  24. ^ Benumof JL: Management of the difficult adult airway. Anesthesiology 75:1087, 1991.
  25. ^ Ochs M, Vilke GM, Chan TC, Moats T, Buchanan J. Successful prehospital airway management by EMT-Ds using the combitube. Prehosp Emerg Care. 2000;4:333-7.
  26. ^ Lefrancois DP, Dufour DG. Use of the esophageal tracheal combitube by basic emergency medical technicians. Resuscitation 2002;52:77-83.
  27. ^ Frass M, Salem MR, Vaida S, Hagberg CA. Esophageal-tracheal double-lumen airways: the Combitube and Easytube. Benumof and Hagberg's Airway Management, 3rd Edition, 2013, Publisher Saunders.
  28. ^ Frass M, Rödler S, Frenzer R, Ilias W, Leithner C, Lackner F. Esophageal tracheal combitube, endotracheal airway and mask: Comparison of ventilatory pressure curves. J Trauma 1989; 29:1476-9.

External linksEdit