Final answer:
The nurse should assess the client who had a hip replacement and has decreased sensation in the lower extremity first.
Step-by-step explanation:
When prioritizing assessments, the nurse should consider the client who has the most urgent or life-threatening condition. In this case, the client who had a hip replacement and has decreased sensation in the lower extremity should be assessed first.
Decreased sensation in the lower extremity could indicate a potential complication such as nerve damage or impaired blood flow, which requires immediate attention.
The other clients' complaints, such as mild incisional pain, a sore throat, and minimal serosanguinous drainage, are important but do not pose an immediate threat to the client's well-being.