I feel somewhat badly that the art teacher was upset but do not understand why she was seeking reassurance from me when I was clearly not a medical professional. I was also not her spiritual adviser (assuming she has any religious convictions) nor was I a licensed therapist.
Although I was reasonably sure that the procedure was safe since this was only an examination as opposed to an actual unicompartmental knee arthoroplasty which has a success rate of just over 90%, I observed that the statistical odds of anything bad happening were incredibly unlikely ... but insofar as I am not a doctor or an actuary, I could not guarantee that everything would be alright. I therefore suggested that she talk to her doctor about her concerns. I then wished her well and fled because I was uncertain as to whether or not she was about to cry. Since I do no enjoy close personal contact (especially with someone who is crying and getting me wet with tears), I also had no interest in hugging her.
I feel for you and your collegue because I experienced once my fear was met distantly and coldly (in my opinion then, now I think the person was really stunned by my reaction to the movie we watched together) and I experienced the 'normal' attempts to 'comfort' me when I had a trauma (that 'reassurance' drove me to meltdown).
After my work with my psychologist I found my way to react to these situations: if someone is in fear or distress - I admit them being in fear and distress and their right to feel so.
I can't forecast the result of dangerous situation - so I don't even try to.
I admit that a surgery is scary (I hate any invasive medical means: knives, needles, syringes and so on - so I can relate this feeling of another human - to my own feeling).
If I feel myself balanced I can give real support: remind the reason why the person has to go through surgery - and admit their pain, fear and their hopes - actually I admit them doing everything possible (if they really did from my point of view) and their feelings in present.
And that is exactly the best support that I can accept if I am in difficult situation.
But that sort of support is so hard to meet from anyone: even people I supported in their hard times - can't answer me with the same. Only my psychologist can fulfill my need of support - and even for her it's stressful: to listen and admit what I have on my mind to say aloud. Not to argue, not to reason me, not to 'reassure' me - just to admit what and how I feel about the situation.
I'm a very difficult patient: I have to know the real risk to get clear picture. All the doctors who treated me become annoyed with my questions about procedures like I questioned their qualification - but I didn't, not really. I question if the barbarian cutting of a living human being is really still necessary to do and the best 'cure' they can supply.
Honestly! Why do they call cutting and removing the parts of human body - 'curing'? If they could treat illness to restore the organizm fully - I agree: that would be 'curing'.
But as it happens now - it's the medical practice of inflicting of 'lesser evil' (removing of damaged tissues comparing with leaving the illness to develop further).
And I has to prepare myself very hard to go through this medical torture - because there is no more humanly alternative in these 'modern' times.
Really: why medics around the world are so busy with gene engineering when they can't really cure the most frequent illnesses and understand how do they occur and the way to revert the pathology?