In the EMS system I worked in about 15 years ago it was a big no-no to inform the pilots of the patient condition prior to the pilots deciding to do the flight.
The medics would answer the Batphone and inform the pilots: " We have a request to go to Little Moosepoop."
The pilots would have been monitoring the weather from start of shift and if necessary call to confirm WX before ageeing to do the flight.
Aircraft were twin engine full IFR capable.
This was to preclude the: "There is a badly hurt 4 year old little girl who will die if you don't go!" scenario.
It worked.
We would also have informed the dispatch of any WX restrictions to flight at the beginning of shift updating as required.
" We have no restrictions to the West, North or South but flights to the East are problematic due to Volcanic ash and migrating humming birds." or whatever. Translated as " Open North, West and South, Standbye East." This was to give dispatch an idea of what to expect when they called.
Shifts were 12 hours for 14 days of a 28 day rotation. 4 Nights, 4 off, 3 days, a short change.( 24 hrs off), 3 nights, 4 days off, 4 Days then a week off aside from which you got your yearly vacation also.
We had 9 pilots - 4 crews and a spare.
It was a great job.