the patient returns without incident, and you document the time and condition of the patient on return to the room. the next day, you are summoned to the unit manager's office, along with the charge nurse and unit secretary. the manager describes how the patient was given a dose of glucophage the morning of the test. the physician wrote an order to hold the glucophage for 2 days prior to the test because of contraindications between the medication and the intravenous contrast dye. the manager demands an explanation for the incident because controls are in place because of similar incidents on the unit that should flag the medication, requiring the nurse to hold the medication prior to the test. who is responsible for initiating a root cause analysis (rca)? how would you conduct a root cause analysis to determine the cause of the problem? who would you include? what is the purpose for conducting the rca? the hospital has a nonpunitive policy for mistakes and errors. how does this affect the rca if the cause of the problem is identified as a mistake by the unit secretary?