Oxygen ears FAQ

Oxygen ears 

DAN medics and researchers answer your questions about dive medicine.

What is “oxygen ear”?
Also known as middle-ear oxygen absorption syndrome, oxygen ear describes a gas volume imbalance in the middle ear after diving with breathing gas that has a higher oxygen fraction than air. The phenomenon is commonly associated with open-circuit diving using nitrox and closed-circuit rebreather diving. The high-oxygen-content gas fills the middle-ear space over the course of the dive. Postdive, the tissues metabolise the oxygen, reducing the total gas volume below what it would be if the spacewere filled with air. If this loss in gas volume is not equalised, relative negative pressure will develop. This is in effect a squeeze, which can present as ear fullness, mild discomfort and/or impaired hearing.
This problem can be avoided easily with occasionalequalisation for several hours after diving. A person who is active, talking and/or laughing during this period may not needto equalise actively. On the other hand, a person who goes to bed immediately after diving might wake up several hours later with mild discomfort. Full resolution is best achieved using gentle equalisation techniques.
— Neal W. Pollock, PhD.

Categories

 2018 (60)
 2016 (119)
After anaesthesia Air Quality Altitude sickness Annual renewal Apnea Arthroscopic surgery BCD Badages Bag valve mask Bandaids Barbell back squat Bench press Bouyancy compensators Boyle's Law Boyle\'s Law Boyle\\\'s Law Boyle\\\\\\\'s Law Boyle\\\\\\\\\\\\\\\'s Law Brain Breast Cancer Breath hold Breath-hold Bruising Buoyancy Burnshield CGASA CO2 Camera settings Cancer Remission Cancer treatments Cancer Cape Town Dive Festival Carbon dioxide Charles' Law Charles\' Law Charles\\\' Law Charles\\\\\\\' Law Charles\\\\\\\\\\\\\\\' Law Chemotherapy Coastalexcursion Cold Water Cold care Cold Conservation Contaminants Corals Cutaneous decompression DAN Profile DAN Researchers DAN medics DAN report DCI DCS Decompressions sickness DCS DReams Dalton's Law Dalton\'s Law Dalton\\\'s Law Dalton\\\\\\\'s Law Dalton\\\\\\\\\\\\\\\'s Law Decompression Illness Decompression Sickness Decompression illsnes Diseases Dive Instruction Dive Instructor Dive accidents Dive computers Dive health Dive medicines Dive medicine Dive safety Dive staff Diveleaders Divers Alert Diving Kids Diving career Diving emergencies Diving injuries Diving suspended Diving Domestic Dr Rob Schneider EAP Ear pressure Ears injuries Emergency plans Environmental impact Equipment care Exercise Eye injuries FAQ Fatigue First Aid Equipment First Aid kits Fish Fitness Francois Burman Free diving Freediver Gas laws Gastric bypass Gordon Hiles HELP Haemorhoid treatment Health practitioner Heart High temperatures Hot Hydrostatic pressure Hypothermia Indian Ocean Inert gas Infections Instinct Instructors International travel International Irritation Kids scubadiver Labour laws Legislation Leukemis Liability Risks Life expectancy Lifestyle Low blood pressure Lung injuries MOD Maintenance Mammalian effect Maximum operating depth Medical Q Medical questionaire Medical statement Middle ear pressure Military front press More pressure Mycobacterium marinum Nitrox Non-rebreather Mask Nosebleeds O2 providers O2 servicing OOxygen maintenance Ocean pollution Orbital implants Oronasal mask Oxygen Cylinder Oxygen Units Oxygen deicit Oxygen ears Oxygen equipment Oxygen masks Oxygen supply Oxygen therapy Part 3 Plastic Pneumothorax Pool Diving Pulmanologist Pulmonary Bleb Radio communications Rashes Report incidents Rescue training Resume diving SABS 019 Safety Save our seas Science Scuba Injury Scuba children Scuba dive Scuba health Scubalearners Skin Bends Skin outbreak Skin rash Snorkeling Sodwana Bay Splits Squeezes Supplemental oxygen Surgeries Surgery The Bends The truth Thermal Notions Tides Travel tips Travel Tweezers Unconsciousness Underwater photographer Underwater pho Vaccines Vagus nerve Valsalva manoeuvers Vasvagal Syncope White balance Winter Wound dressings Wreck dive Youth diver abrasion air-cushioned alert diver altitude antibiotics antiseptics bandages bent-over barbell rows breathing air calories burn cardiovascular checklist chemo port child clearances closed circuit scuba currents cuts dead lift decompression algorithms decongestants dehydration dive injuries dive medicing dive ready child dive reflex dive tribe diver rescue dive diving attraction doctors domestic travel dri-suits dry mucous membranes dry suits dry ear spaces electroytes emergency action plans emergency assessment equalizing exposure injuries flexible tubing health hospital humidity immersion pulmonary edema (IPE join DAN longevity lower stress marine pathogens medical procedures medical risk assesment minor illness mucous membranes nasal steroids nasal newdivers nitrogen bubbles off-gassed operating theatre outgas pain plasters post dive preserve rebreather mask rebreathers risk areas saturation scissors scuba equipment scuba single use sinus infections stings strength tecnical diver thermal protection training trimix unified standards warmers water quality