Dr. Frans J. Cronjé Practice
MBChB (UP), MSc (Aerospace)
Designated Senior Aviation Medical Examiner
Diving Medical Examiner - Class II (Air)
Near Tygervalley, Ridgeworth (Bellville)
Dear Client, SACAA has confirmed that aviation and diving medicals may continue subject to current the governmental conditions regarding transport. Please complete the COVID
Risk Screen:
https://coronavirus.westerncape.gov.za/risk-assessment-covid-19
If your risk is designated as "Low" by this test, our practice will accept candidates for Aviation and Diving Medical Examinations with strict protective precautions: (1) Only 1 patient is seen at a time; (2) All working surfaces are sprayed with viricidal sanitizer after each medical; (3) Pilots, cabin crew or divers who have been potentially exposed to COVID-19 patients or have flown from countries with high-risk COVID-19 transmission, or who are suffering from fever or respiratory illness, are asked to delay their appointments by at least 14 days; (4) all governmental rulings must be observed (e.g., wearing masks). The right of admission to the practice is reserved, and may be denied in the interest of safety of others.
Oxygen Toxicity
Oxygen is a reactive and metabolically essential gas. When breathed in diluted, sub-atmospheric partial pressures (20.95 % of 1 atmosphere), it supports aerobic metabolism and its toxicity is buffered by the body's defenses. However, as a partial pressure of 0.5 atmospheres of oxygen is exceeded, it starts to produce pulmonary toxicity, and above 1.4 to 1.6 atmospheres, it may precipitate oxygen toxicity seizures within a short but unpredictable period of time.
This presentation reviews the nature and manifestation of oxygen toxicity from a practical standpoint.