In this Part IX of this subtitle the following words have the meanings indicated. “Advice” means the recommendations of the advisory committee. “Advisory committee” means a patient care advisory committee. “Petitioner” means one of the following individuals who is responsible for making a decision with a medical consequence for a patient: A patient; A physician; A registered nurse; A social worker; A family member; A guardian; An individual with a power of attorney to make a decision with a medical consequence for a patient; or Any other health care practitioner directly involved in the care of the patient. “Related institution” does not include a domiciliary care home that is operated independent of any other related institution.