Creative emergency physicians exist worldwide. Check out this nifty trick on ring removal by Dr. Simon Carley (Centre For Evidence Based Emergency Care at Manchester Metropolitan University) of St.Emlyns fame.
Trick of the Trade
Use the elastic strap from an oxygen face mask to wrap the finger.
When I was first learning this technique, I was taught to use suture material or string to wrap the finger. Neither worked very well. The proposed elastic strap may be stretchy enough to create a tight wrap and thin enough to get under the trapped ring.
Looking forward to trying this trick.
Check out another approach to ring removal and the technique for removing tungsten rings.