Helopat,
Read up on the accident stats for EMS 206's.....and then compare the 206 to Twin engined helicopters.
206's are very limited in performance compared to the BK-117 and EC-145, 365's, and the Bell 412.
I have flown EMS in BO-105, BK-117, and Bell 412's.....hands down favorite was the 412. It has plenty of power, can carry up to four patients (number of patients is limited by the ability of the med crew to attend to the patient while in flight rather than patient weight).
The thought of flying a Bell 206 in EMS makes me shudder.....that stacks the odds towards bad things happening.