My wife is an orthopedic surgery PA, so she's been in her fair share of operations over the past 20 years... Tommy John surgeries, as well, ironically enough. As such, you'd think she'd be pretty quick to recognize a "routine" operation for what it is and push any fear aside. But I'll tell you, it is the COMPLETE opposite. For someone that's been in literally thousands of surgeries, she absolutely hates the idea of surgery when it comes to herself and her loved ones. It has nothing really to do with the surgeons either. It's the anesthesia that terrifies her. She's seen first time surgical patients get the same anesthesia drug and dosage as every other patient, but instead of going to sleep like 90% of the population, the patient will immediately crash. Or even if the patient has had surgery before, and gotten through it successfully, this one time is when their body just didn't play well with the anesthesia used. Simply put, that stuff can be no joke and there's no telling how your body will react to it. I don't know Sang's medical history obviously, but part of me wonders if this wasn't so much a "surgery mishap," as it was an anesthesia reaction.
Could have even been a blood clot or really bad post-surgery infection. Rare stuff... but it still happens....