Run an injecting practice long enough and the math is unforgiving: you will eventually have a bad outcome. A complication, a reaction, a result that goes wrong despite good technique and good intentions. The adverse event itself is rarely what ends a practice. What ends practices is the panic that follows it — the defensive silence, the patient who felt abandoned, and above all the chart that got quietly "cleaned up" afterward. The hours after a bad outcome, and the record you create in them, decide whether you're managing a complication or building a board case against yourself.
This is general education for owners, not medical or legal advice. Clinical management follows your training and protocols; reporting and legal specifics come from your medical director, counsel, and carrier.