Study Reveals No Connection Between Rheumatoid Arthritis and Blood Transfusion Risks Post Knee Replacement

Study on Rheumatoid Arthritis and Blood Transfusion Risk During Total Knee Replacement

A recent study conducted by researchers at Hospital for Special Surgery (HSS) revealed that having rheumatoid arthritis (RA) does not increase the risk of needing blood transfusions during or after total knee replacement surgery. This finding was presented at the ACR Convergence 2024, the annual meeting of the American College of Rheumatology.

Key Findings:

• Advances in surgical techniques and the use of tranexamic acid have reduced the need for transfusions in patients undergoing knee replacements.
• Despite past beliefs that RA patients might be at higher risk for transfusions due to anemia, the study showed no significant correlation.
• Researchers analyzed records of over 29,000 patients who had knee arthroplasty from February 2016 to December 2022.
• Out of this group, 822 patients (2.8%) received transfusions, with rates dropping from 5.7% in 2016 to 0.9% in 2022.

Important Contributors to Transfusion Risk:

• A higher preoperative hemoglobin level and the use of tranexamic acid lowered transfusion risk.
• Male patients and those with more health problems had a higher risk of needing transfusions.

Future Directions:
The research team aims to create a tool to identify patients’ transfusion risk based on their hemoglobin levels, sex, age, and overall health. This may guide orthopedic surgeons in determining which patients can safely proceed with outpatient knee surgery without the need for transfusions.

Conclusion:
The study’s results are significant for managing care in RA patients undergoing knee replacements. Understanding that RA doesn’t increase transfusion risk can lead to improved surgical planning and outcomes for these patients.