Underwater Diving Injuries Ascent Injury
Air is present at atmospheric pressure in many areas of the body. Hollow areas such as the ears, sinuses, intestines and others are directly affected by outside air pressure.
The pressure applied to the body decreases greatly as a person ascends closer and closer to the surface. The body may be unable to equalize the pressure between the water and the pressure inside a cavity, such as the middle ear, sinuses or lungs. As the pressure decreases, trapped air expands in the air cavities.
Less serious injuries include:
- Reverse ear squeeze
- Reverse tooth squeeze
The expanding air can cause serious injury to a body cavity. The diving term for this is called a pop.
More serious injuries include:
Continue to Underwater Diving Injuries Pneumothorax
- Arness MK. Scuba decompression illness and diving fatalities in an overseas military community. Aviat Space Environ Med. 1997 Apr;68(4):325-33. 
- Freiberger JJ, Lyman SJ, Denoble PJ, Pieper CF, Vann RD.Consensus factors used by experts in the diagnosis of decompression illness. Aviat Space Environ Med. 2004 Dec;75(12):1023-8. 
- Germonpre P. Patent foramen ovale and diving. Cardiol Clin. 2005 Feb;23(1):97-104. 
- Hunt JC. Diving the wreck: risk and injury in sport scuba diving. Psychoanal Q. 1996 Jul;65(3):591-622. 
- Moon RE, de Lisle Dear G, Stolp BW. Treatment of decompression illness and latrogenic gas embolism. Respir Care Clin N Am. 1999 Mar;5(1):93-135. 
- Smerz RW. Age associated risks of recreational scuba diving. Hawaii Med J. 2006 May;65(5):140-1, 153. 
- Tetzlaff K, Shank ES, Muth CM. Evaluation and management of decompression illness--an intensivist's perspective. Intensive Care Med. 2003 Dec;29(12):2128-36. 
- Tetzlaff K, Thorsen E.Breathing at depth: physiologic and clinical aspects of diving while breathing compressed gas. Clin Chest Med. 2005 Sep;26(3):355-80, v.