Final answer:
The role of the nurse that is crucial to the prevention of fragmentation of care is the Case manager.
Step-by-step explanation:
The role of the nurse that is crucial to the prevention of fragmentation of care is the Case manager. A case manager is responsible for coordinating and managing the various aspects of a patient's care, ensuring that all healthcare providers are working together and that the patient receives continuous and coordinated care. By coordinating between the patient, doctors, specialists, and other healthcare professionals, the case manager helps to prevent fragmentation of care and ensures that the patient's needs are being met.