Undersea & Hyperbaric Medicine Journal Volume 42, Issue #5

Course overview

Learner Objectives: As a result of having attended the meeting, the participants should have had the opportunity to: 1) Understand the inspired oxygen content when diving a semi closed rebreather is governed by the physiological variables such as the divers ventilation, the ventilator equivalent and the oxygen consumption. 2) Understand that while semi closed rebreathers are technically simple the interaction with the diver is complex. 3) Understand the basis for the model to be able to predict where and when it will fail. Subject Matter: 1.Ef¿ciency of hyperbaric oxygen and steroid therapy in treatment of hearing loss following acoustic trauma 2.Measurement and modeling of oxygen content in a demand constant mass ratio injection rebreather Teaching Methods: •Journal Reading •Examination of material •Evaluation of activity Evaluation Methods: Evaluation is offered through the online educational portal with 3 graded questions each UHM Journal paper and an overall evaluation at completion of the Journal-based activity. REFERENCES: 1. Lundgren CEG. Applying physiology in the design of 6. Användarhandbook OM dyksystem, written by Interspiro breathing gear for divers. In Hyperbaric Physiology and ltd, distributed by the Swedish Defense Materiel Adminis- Medicine, Lin Y-C and Niu AKC, Eds. San Pedro California: tration M7786-263911 Försvarets Bok och blankettförråd, Best Publishing Company, 1988; 155-170. Stockholm, Sweden. 2. Nuckols ML, Clarke JR, Marr WJ. Assessment of oxygen 7. Harding RM, Gradwell DP. Hypoxia and hyperventila- levels in alternative designs of semiclosed underwater tion. In Aviation Medicine. 3rd Ed. ISBN 0-7506-3252-6. breathing apparatus, Life Support and Biosphere Science, Ernsting J Nicholson A.N Rainford D.J Eds. Oxford UK, 1999: Vol 6; 239-249. Butterworth-Heinemann ltd, 1999. 3. Morrison JB, Reimers SD. Design principles of under- 8. EN 14143:2013 Respiratory equipment. Self-contained water breathing apparatus. In: The Physiology and Medicine re-breathing diving apparatus ISBN-978-0-580-69895-8. of Diving. 3rd Ed. ISBN 0-941332-02-0. Bennett PB and 9. Nuckols ML, Clarke JR, Grupe C. Maintaining safe Elliott DH, Eds. San Pedro California: Best Publishing oxygen levels in semiclosed underwater breathing apparatus, Company, 1982. Life Support and Biosphere Science, 1998: Vol 5; 87-95. 4. Frånberg O, Loncar M, Larsson Å, Örnhagen H, 10. Warkander DE, Lundgren CE. Dead space in the Gennser M. A metabolic simulator for unmanned testing of breathing apparatus; interaction with ventilation. Ergonomics. breathing apparatuses in hyperbaric conditions. Aviat Space 1995 Sep;38(9):1745-1758. Environ Med. Nov;85(11):1139-1144. 2014. 11. Åkesson S, Lundgren CEG. (AGA AB, Sweden), 5. Brunner JX, Wolff G, Cumming G, Langenstain H. Breathing apparatus. US Patent 3,827,432, August 6 1974. Accurate meassurment of N2 volumes during N2 washout 12. Nuckols ML. Oxygen levels in closed circuit UBA requires dynamic adjustment of delay time. J Appl Physiol. during descent, Life Support and Biosphere Science, 1996:1985 Sep;59(3):1008-1012. Vol 2; 117-124. 1. Lundgren CEG. Applying physiology in the design of 6. Användarhandbook OM dyksystem, written by Interspiro breathing gear for divers. In Hyperbaric Physiology and ltd, distributed by the Swedish Defense Materiel Adminis- Medicine 2. Quaranta A, Portalatini P, Henderson D. Temporary and ¿ammatory cytokines of rat cochlea in noise-induced hearing permanent threshold shift: an overview. Scand Audiol Suppl loss. Otol Neurotol 2012;33:1672-1678. 1998;48:75-86. 10. Cakir BO, Ercan I, Civelek S, Körpinar S, Toklu AS, 3. Counter SA, Klarescov B. Hypoasis among the polar Gedik O, Isik G, Sayin I, Turgut S. Negative effect of Eskimos of northwest Greenland. Scand Audiol 1990;19: immediate hyperbaric oxygen therapy in acute acoustic 149-160. trauma. Otol Neurotol 2006;27:478-483.