The Professional Conduct Committee argued she should be suspended because she had committed a serious assault. As well, she had given her work as one of the reasons for the assault.
"Ms Janssen told police she committed the assault because she was angry and frustrated and in her work she regularly has to deal with stressed, nervous and, at times, aggressive patients," said a submission from counsel for the Professional Conduct Committee.
The assault also diminished the reputation of her profession.
Ms Janssen's lawyer told the tribunal that she was not intoxicated on the night of the assault and although her actions were "clearly wrong and inappropriate", they still did not reflect adversely on her fitness to continue practising.
The tribunal said that violence would not be tolerated in health professionals, even if it happened outside the course of their work.
As well as being censured, Ms Janssen was given a three-month suspended sentence. She was also ordered to pay 25 per cent of the costs of the investigation.