Your mom certainly sounds manic. But, well she may not have control over having bipolar, she does have the choice to get treatment, which she declined. Maybe once she is back to her baseline you can discuss this incident with her. It definitely is not right for a mother to abandon her daughter when she is having surgery. Hopefully your mom will understand that, see how out-of-control her behavior is at times, and get help for her issues.

On a different note, how are you doing now? How long will it take you to recover from the surgery?