NAUI Master Scuba Diver 148 Diving Physiology between breaths. Can lead to problems. Sp ontaneous Pneumothorax- Pneumothorax that occurs without an obvious injury. More frequent in young males who smoke. Su bcutaneous Emphysema. Gas escaping from ruptured alveoli that rises to the skin under your neck. The prefix “sub” means under, and “cutaneous” means skin. Su rfactant- Named for surface active agent. Lipoprotein secreted by your alveoli. Reduces surface tension of fluids that coat your lung, keeping your alveoli from collapsing. Sw immer’s Ear- Painful infection of your outer ear from leaving your ears wet after swimming or diving. Usually bacterial, sometimes fungal. Th oracic squeeze- Rare malady where your lungs compress with increasing depth during a breath-hold dive, to below residual volume. Ti dal Volume- Volume of air that you breathe in a normal breath. To ynbee Equalization Maneuver - Ear equalization maneuver where you swallow with your mouth and nose closed. Tr achea- Also called windpipe. Thin-walled, cartilaginous and membranous tube from your larynx to your bronchi. Carries air to your lungs. Tr apdoor effect- Phenomenon where ambient pressure seals your Eustachian tube closed, preventing equalization. Va lsalva Equalization Maneuver- Equalization technique of gently blowing out against a closed mouth and nose. Ve ins- Branching, membranous tubes that carry “used” blood back to your heart. Ve nules- Small veins, that join your capillaries to your larger veins. Ve rtigo- Hallucination of spinning, rotation or whirling. Ve stibular System- Inner ear organ that maintains your orientation to gravity, and orientation to movement through space. Vit al Capacity- Total volume of air that you can breathe from largest inhale to fullest exhale. FOR FURTHER READING Bennett, P.B. and D.H. Elliot (eds.). Physiology and Medicine of Diving. 4th Edition W. B. Saunders Company Ltd., 1993. Bookspan, J. Diving Physiology In Plain English. Undersea and Hyperbaric Medical Society, 1995. Sixth printing 2006. Bookspan, J. Health & Fitness In Plain English. Healthy Learning, Monterey, CA, 2008. Joiner, J. NOAA Diving Manual: Diving for Science and Technology. 4th Edition. Best Publishing, 2001. Kindwall, E.P. (Ed.) Hyperbaric Medicine Practice. Best Publishing. Lippmann, J. Oxygen First Aid for Divers. J.L. Publications, 1992. Roydhouse, N. Underwater Ear and Nose Care. Best Publishing, 1981. Shilling, C.W., C.B. Carlston, and R.A. Mathias, (Eds.) The Physician’s Guide to Diving Medicine. Plenum Press, 1984.
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