Nurses and accusations of sexual harrassment

I am a LVN in California that works at an elementary school. The school district I work tries to place license nurses at each school. I have been trying to find information on how a nurse can protect themselves from accusations of sexual harrassment. Working in a school I've learned there are special "precautions" to touching students. You can't hug for one. Unfortunately, the nurses are learning this as we go. The district nurse I work under never gave me specific information. As a nurse we do assessments that may require touching, i.e. palpating for swelling if a child bangs their head. One of my colleagues lost her job because the district nurse accused her of inappropriate touching. She had been stroking the arm to comfort an upset student and holding the hair of another while the student was vomiting. I can not find anything in our union's information booklet to address these issues or even explain expectations. I've searched a variety of nursing league websites and board sites to no success. Does anyone know where I can get such information. I'd like to present the information at our next nurses meeting and turn this sad situation into something more positive.