Final answer:
The phrase indicating the nurse's duty was 'neglected to raise the bedside rail', pointing to a breach of safety protocols typically required in patient care.
Step-by-step explanation:
The phrase that indicates the nurse had a duty to the patient is 'neglected to raise the bedside rail.' This phrase suggests a breach of the nurse's professional responsibility towards patient safety. Raising the bedside rail is a standard precaution in hospitals to prevent patients from falling out of bed, especially when they have been administered medication that may affect their mobility or consciousness. Given that nurses are tasked with patient care, failing to perform such a precautionary measure can be seen as negligence, especially considering the potential for hip fractures and the serious complications they can have for the elderly, as mentioned in the background information provided.