L. G. is a 68-year-old man who goes to the hospital emergency department with a complaint of left foot pain. He has a seven-year history of type 2 diabetes that is controlled with metformin (Glucophage) 500 mg orally twice daily and has been a 1 pack per day smoker for 20 years. His BMI falls in the moderate obesity range.

1. L. G. will be admitted to the medical unit. What nursing interventions should be included in his plan of care?

2. What diagnostic tests may be needed to help establish a diagnosis and why?