i think it depends...if u applied for tourist, visit, work visa before u met ur partner and really tried to enter canada with no success then it might b a red flag now....but u applied stating that u go to visit him, b with him during surgery and he invited u, i think it's ok, u could use it as proof for the relationship...say that u tried to visit him and could not, give the file number and copy of the application if u still have it
in our case, we got tourist visa refusals enough times but they were all cuz we just wanted to go and visit my family together...he never had any intentions of moving or visiting canada before we met; i refuse to believe us wanting to spend my mom's birthday or holidays with my family in ca would raise a red flag
just don't leave anything unexplained!! good luck preparing!!