As long as you get out the Mayday Mayday Mayday callsign and rough position this helps a lot, 7777 is great and ELT activation is also usefull.
Give them as much opportunity to find/help you as poss.
About 7 months ago I heard a chap request a Taxi to Wairau Hospital while enroute to Omaka from Nelson (Via the flying club), no mayday or Pan, the guy was a Dr and flying over for an emergency case. Tower cleared him straight in, we were all advised to stay clear , the guy came straight in on long finals to RWY12. All plain english, Not strictly an emergency but he got all the help he needed.