diagnostic evaluation the client is scheduled for a complete blood count (cbc), rheumatoid factor (rf), erythrocyte sedimentation rate (esr), joint x-rays, and a bone scan. additional diagnostic tests, which may be performed to help diagnose rheumatoid arthritis, include a mri, synovial fluid analysis, or a synovial biopsy. 1. which nursing intervention related to the scheduled bone scan is most important to implement?