Dr. Frans J. Cronjé Practice
MBChB (UP), BSc(Hons), MSc (Aerospace), DOM
Designated Senior Aviation Medical Examiner
Diving Medical Examiner - Class II (Air)
Occupational Medical Practioner
Near Tygervalley, Ridgeworth (Bellville)
PLEASE NOTE: Dr Frans and Sr Lucie Cronje have accepted a two-year training and clinical position in Aerospace and Hyperbaric Medicine at the American Mission Hospital in the Kingdom of Bahrain from 26 February 2023 until 3 March 2025.
The South African practice will not be available for appointments from 20 February 2023 until 1 March 2025.
After 17 February 2023, the Booking tab below will only show availability after 3 March 2025.
Note there is now also a LIGHT BLUE BUTTON with a list of all Senior DAME's in CT area and a
DARK BLUE BUTTON with all the Diving Medical Practitioners in South Africa on a Map with their details as you Zoom in.
Kindly make appointments with them.
All your records are available to them through the SACAA EMPIC system or SAUHMA Database, so your visit to them should be simple and without any difficulty. Thank you for your support of our practice. Some of you have been with us for many years, and we will miss you until we hopefully see you again in 2025. With great appreciation. Dr Frans & Sr Lucie Cronje
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.