Which laboratory values would the nurse expect to find in a patient with rheumatoid arthritis (RA)?
A) Negative rheumatoid factor
B) Low C-reactive protein
C) Low erythrocyte sedimentation rate
D) Antibodies to cyclic citrullinated peptide (anti-CCP)
D) Antibodies to cyclic citrullinated peptide (anti-CCP)
Explanation: A) More than 70% of patients with rheumatoid arthritis (RA) test positive for rheumatoid factor.
B) The erythrocyte sedimentation rate (ESR) typically is elevated with rheumatoid arthritis (RA) as is the C-reactive protein, a nonspecific indicator of inflammation.
C) The erythrocyte sedimentation rate (ESR) typically is elevated with rheumatoid arthritis (RA) as is the C-reactive protein, a nonspecific indicator of inflammation.
D) A marker for rheumatoid arthritis (RA) is antibodies to cyclic citrullinated peptide (CCP). The anti-CCP test detects these antibodies and may yield positive results even years before RA symptoms emerge.
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