I love my family doctor because he listens and is not afraid to say "I don't know." I loathe my cardiologist because he has an ego the size of the visible universe and is a jerk--but is said to be the best there is--by other doctors.
In any event, "never give up" is (usually) a good rule. On the other hand, "Fanaticism consists of redoubling your efforts when you have forgotten your aim."
The opposite is fatalism, and that would have killed your patient.
So I say "good on ya," and keep it up.
--Boris