Presence of anti-TF4/heparin antibodies in patients preoperatively treated with enoxaparine after orthopedic surgery
Published 2022-06-23
Keywords
- heparin-induced thrombocytopenia,
- anti-PF4/heparin antibodies,
- total knee or hip arthroplasty,
- enoxaparine,
- postoperative risk
How to Cite
Copyright (c) 2021 Natali Jordanovska-Guceva, Andrijan Kartalov, Biljana Kuzmanovska, Milan Samardziski, Filip Gucev
This work is licensed under a Creative Commons Attribution 4.0 International License.
Abstract
Heparin-induced thrombocytopenia (HIT) is a condition caused by antibodies against the platelet factor 4 (PF4)/heparin complex. This significantly increases the risk of bleeding and thrombosis in patients, which is essential in the postoperative period. In this study we examined the rate of seroconversion of anti-PF4/heparin antibodies in patients with rheumatoid arthritis (RA) and osteoarthritis (OA) after total knee or hip arthroplasty. The aims of the study were to assess the risk of HIT by evaluation of induction of anti-PF4/heparin antibodies in patients with RA and OA after total knee or hip arthroplasty, treated prophylactically with enoxaparine. Material and methods: We followed 36 patients aged 18 to 80 years, after total knee or hip arthroplasty, treated prophylactically with enoxaparine. Patients were divided in two groups: patients with RA and patients with OA. They were examined for occurrence of HIT. Blood was sampled twice, from a peripheral vein, for immunologic tests. The first time it was done before enoxaparine application and the second time postoperatively 10 days after surgery. We noted demographic data, anti-PF4/heparin antibodies, erythrocyte sedimentation rate (ESR), CRP, RF, antiCCP and anti-nuclear antibodies Hep2 (ANA). Results: There was no significant difference in the values of anti-PF4/heparin antibodies in patients with RA and OA preoperatively. The presence of anti-PF4/heparin antibodies was significantly lower in RA patients compared to OA (7.14% versus 27.27%, p=0.034). There was no significant association between levels of anti-PF4/heparin antibodies and ESR, CRP, RF, CCP, ANA. Conclusion: The results obtained showed a lower level of anti-PF4/heparin antibodies in patients with RA than in patients with OA. This shows that there may be a difference in the generation of this antibody in patients with RA compared to patients with OA, prophylactically treated with enoxaparine after total knee or hip arthroplasty.
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