What must the attending physician do after declaring death?

The requirement for the attending physician to write a note declaring death in the patient's chart is crucial for legal and medical documentation purposes. This documentation serves as an official record that the patient has been declared deceased, ensuring that there is no ambiguity regarding the patient's status. It provides a critical legal safeguard for the healthcare facility and the attending physician, as well as information for other healthcare providers involved in the patient's care.

Writing this note also helps initiate necessary protocols that may follow after a death, including informing relevant parties and coordinating any further processes, such as end-of-life care or organ donation discussions. This step is fundamental, as it maintains the integrity of medical records and supports the transparent handling of the patient's transition from life to death within the healthcare system.

The other options, while potentially relevant in specific contexts, do not represent the immediate or foremost responsibility of the attending physician after declaring death.