Final answer:
The nurse should report a quarter-sized spot of blood on the dressing immediately post-amputation, as it could indicate a complication, although managing a blood glucose level of 200 mg/dL is also important.
Step-by-step explanation:
When caring for a client who has undergone a right below-the-knee amputation, it is crucial to monitor the client for any signs of complications that may require immediate medical attention. From the options listed, the nurse should report a quarter-sized spot of blood on the dressing to the provider immediately. While a certain amount of redness is expected post-surgery and a white blood cell (WBC) count of 10,000 is within normal limits, the presence of a quarter-sized spot of blood may indicate bleeding that could lead to a hematoma, infection, or other complications. The blood glucose level of 200 mg/dL, although elevated, especially for a diabetic patient like the one in the clinical focus scenarios, is not as immediately concerning as active bleeding, but should still be addressed as part of the patient's ongoing care.