Jacek Kot

Prof. Jacek Kot, MD, PhD - physician, specialist in anaesthesiology and intensive care, expert in Diving and Hyperbaric Medicine (Level 3 Expert ECHM), the Head of the National Centre for Hyperbaric Medicine in Gdynia, Poland (Medical University of Gdansk), the President of the European Committee for Hyperbaric Medicine (ECHM), past President of the European Underwater and Baromedical Society (EUBS).  The co-author of the current ECHM/EUBS recommendations for recreational and commercial diving during COVID-19 pandemia www.KOMH.pl, medical consultant of DAN Europe and reviewer of deep-dive plans. Professionally interested in technical diving, fatal diving accidents, treatment of diving accidents and other life-threating disorders (gas gangrene, arterial gas embolism, carbon monoxide intoxication) in hyperbaric chambers Diving instructor in the past, currently leads courses and lectures.  The co-author of international publications „The Science of Diving” and „Coping With Extreme Environments: A Physiological/Psychological Approach”, as well as the co-author of the book „NITROKS – Poradnik dla nurków” (“NITROX – The manual for divers”).


Title of the presentation: “Counterdiffusion in diving”.


“In diving, counterdiffusion of gases is the diffusion of gas molecules in opposite directions caused by a change in the
composition of the external ambient gas in the chamber or breathing gas which can occur even without change in the ambient pressure. It concerns either gas transfer through the skin, i.e. in the hyperbaric chamber or within internal organs, i.e. in inner ear. Improper switch of breathing gases can induce decompression sickness. In the presentation, the (pato)physiology of gas counterdiffusion will be presented and discussed in reference to deep dives”.


Prof. Jacek Kot, MD, PhD
DAN Europe Medical Consultant
Head of the National Center for Hyperbaric Medicine in Gdynia, Poland
Medical University of Gdansk


2007 - 2023

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