aviation medicals diving medicals


Dr. Frans J. Cronjé


  MBChB  (UP), MSc

 Senior Aviation Medical Examiner     Diving Medical Examiner



Hyperbaric (i.e. increased pressure) Oxygen Therapy (HBOT) is a specialised medical treatment that elevates blood & tissue oxygen (O2) levels when breathed under pressure. Under these conditions O2 has both physiological & pharmacological effects that support healing, combat infection, and prevent further tissue loss.


To get information about how to refer a patient for, or to receive, HBO therapy, please click here for details on the Baromedical Facility at Tygerberg Medical Campus


FOR HBO   (021) 938 9810 / 09/ 08   



Selecting Patients for HBO Therapy - Dr FJ Cronje

The ability to appropriately evaluate and select patients for hyperbaric oxygen therapy is one of the most essential clinical skills. Performed expertly, in improves good outcomes and reduces costs. The revers is the case when it is not.


This 35 min presentation covers a central set of principles to guide the provess of selection and evaluation to improve the cost-effectiveness of HBO Therapy.

Idiopathic Sudden Sensorineural Hearing Loss - Dr FJ Cronje

Idiopathic sudden sensorineural hearing loss is an otological emergency with an incidence of 5 - 30 per 100,000. Although between 1 and 3 thirds of individuals recover, this still leaves a large number of individuals with moderate to profound hearing loss. Many therapies for ISSNHL have been tried over the years. Dr Cronje provides a 39 minute overview of the background, use and evidence supporting the use of HBO in the treatment of this condition. The presentation was recorded at the Southern African Undersea & Hyperbaric Medical Association Conference in February 2014.


The lecture outline was based on an excellent overview by Kon Kaen University:

(Click here for the outline) 

Myringotomy & HBOT - Dr FJ Cronje

Given the patients referred for HBOT, and particularly patients with head and neck irradiation with radionecrosis, many patients are unable to equalise the middle ear with increasing pressure. These patients are usually referred to an ENT for PE tubes (i.e., grommets). However, in the emergency setting, patients or injured compressed gas divers who are unable to equalise (due to suppressed consciousness or Eustachian tube difficulties) may need to receive an emergency myringotomy. 


This 6 min videoclip offers some essential information on how to perform a myringotomy.