Final answer:
The care delivery model with a registered nurse directly caring for a patient and maintaining 24-hour responsibility for their plan of care is primary nursing. This model involves comprehensive care management, including monitoring, treatment, and updating the plan as needed.
Step-by-step explanation:
The care delivery model in which a registered nurse provides direct care and also has 24-hour responsibility for updating the patient's plan of care is known as C. primary nursing. In this model, rather than distributing tasks among a team or providing care based on the functionality of nursing tasks, one primary nurse is accountable for the entirety of an individual patient's nursing care. This includes a comprehensive range of responsibilities such as assessing and responding to patient needs before, during, and after treatment, monitoring the patient's condition and the effectiveness of interventions, and ensuring that procedures are performed accurately and with sterility.
For example, in the context of providing dialysis treatments, the primary nurse would be responsible for reviewing the patient's medical history, current health status, preparing solutions and equipment, and monitoring the patient during the treatment. This approach can lead to more personalized and continuous care, as the nurse not only establishes a plan of care but revisits and revises this plan as the patient's condition evolves over time.