Although that is highly disturbing, unless the blood being in the bathroom caused your husband to sustain any sort of damages or personal injuries, I do not think the act alone would justify a lawsuit. It would not fall under the category of medical malpractice either.
Unless your husband suffered some new injury or his condition worsened as a result, a lawsuit isn't the best option. Complain (in writing) to the hospital administration and get them to clean up their act.
I hope your husband is better soon. Good luck.
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