Sandra, a 69-year-old client, presents complaining of joint pain and stiffness in her hands. A physical examination reveals joint erythema, warmth, and edema, along with limited range of motion. The nurse practitioner suspects osteoarthritis. What diagnostic test should the nurse perform to confirm this diagnosis? Sandra, a 69-year-old client, presents complaining of joint pain and stiffness in her hands. A physical examination reveals joint erythema, warmth, and edema, along with limited range of motion. The nurse practitioner suspects osteoarthritis. What diagnostic test should the nurse perform to confirm this diagnosis? Bone marrow biopsy Antinuclear antibody test X-ray Magnetic resonance imaging scan