According to CAP 413, the initial emergency message contains the following information:
- PAN PAN/PAN PAN/PAN PAN
- Name of the station being addressed
- Your callsign
- Type of aircraft
- Nature of the urgency
- Your intentions
- A position report
- Your qualifications (PIC, PUT, what rating you have,etc)
- Any other useful information
You will keep using your own callsign through out the whole procedure
However, I am not sure if medical urgency flights use PAN in their callsign
I know that they present themselves as PAN PAN MEDICAL.
Maybe somebody else could fill you in on that
Hope this helps.
C-T