I was unaware of the existence of Canadian Paranurses in SAR in the 1950s until this evening.
I found two articles online tonight - this one from March 2017:
An Air Force pioneer: Grace MacEachern, para-belle And this other one (about 85% of the way down this page on nursing sisters in Canada):
Remembering ... The Para-Belles There's also this illustrated newspaper article from 1951, but a bit hard to read if you don't sign up for the service:
https://www.newspapers.com/newspage/7044002/ What led me to these was my signal mirror obsession - one of my searches led to this photo, probably during her training in 1951:
"Pilot Officer Isabelle Thomson, a nursing sister from North Bay, Ontario, and a student of the third peacetime para rescue course in Jasper, Alberta, uses a signal mirror. (DND Archives Photo PL-52552)"
[ The signal mirror appears to be an American ESM/I "cross-in-glass" double-sided tempered glass signal mirror, first issued in 1943, and used by Canadian forces in WW2 ]