Fibrin monomer complex on postoperative day 1 is correlated with the volume of deep vein thrombosis after knee surgery

Author:

Akagawa ManabuORCID,Kijima Hiroaki,Kimura Yoshiaki,Saito Hidetomo,Saito Kimio,Wakabayashi Ikuko,Kashiwagura Takeshi,Miyakoshi Naohisa

Abstract

Abstract Purpose Patients undergoing knee surgery are at high risk for deep vein thrombosis (DVT), which is infrequent but potentially life-threatening. It has not been identified how to efficiently detect high-risk DVT while minimizing bleeding complications from anticoagulation. We hypothesized that the degree of activation of thrombotic markers may correlate with the size of the thrombus. Therefore, we investigated the correlation between thrombotic markers and DVT thrombus volume in patients after knee surgery. Methods This retrospective study involved 29 patients who underwent around knee osteotomy or total / unicompartmental knee arthroplasty from 2018 to 2020. Fibrin monomer complex (FMC) at 1, and 7 days after surgery, and D-dimer at 4, and 7 days after surgery were investigated. In addition, the volume of DVT was estimated with ultrasonography at the 7 days after surgery. Body mass index, surgical time, and total volume of blood loss were also evaluated. Factors related to thrombus volume were examined statistically. Results Nine patients (31.0%) exhibited asymptomatic distal DVT, whereas 1 patient (3.4%) experienced asymptomatic proximal DVT. No patients had pulmonary embolism. Statistical analysis showed that only FMC concentration on postoperative day 1 was significantly correlated with thrombus volume (p <  0.001, 95% confidence interval 0.41 to 0.839, r = 0.679). Conclusions The FMC concentration was a useful early indicator of deep vein thrombosis after knee surgery. Monitoring the FMC concentration could enable selective identification of patients with a high thrombus volume, which is associated with a high risk for pulmonary embolism.

Publisher

Springer Science and Business Media LLC

Subject

Orthopedics and Sports Medicine

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