Final answer:
To prevent complications in clients with a pelvic fracture, nurses should focus on preventing blood clots, encouraging respiratory exercises, regularly repositioning to avoid pressure sores, and monitoring closely for signs of infection.
Step-by-step explanation:
The nurse's priority action to prevent complications in a client with a pelvic fracture would involve several key aspects. First, it is crucial to prevent the formation of blood clots by encouraging mobility, if possible, and using anticoagulants prescribed by the physician. In addition, the nurse should focus on respiratory exercises to enhance air exchange and prevent pneumonia, as well as regular repositioning of the client to avoid pressure sores. Careful monitoring for signs of infection, particularly in cases where catheterization is required, is also essential to prevent urinary tract infections.