Background: To (1) investigate the early incidence of deep venous thrombosis (DVT) after knee arthroscopy at a single institution and (2) determine the early marker for DVT in these patients.Methods: The records of patients who underwent knee arthroscopy in our department between January 2018 and October 2019 were reviewed. Ultrasonography was performed for each patient at 24h preoperative and 72h postoperative. The low-molecular-weight-heparin (LMWH) was routinely used as thromboprophylaxis on the first day postoperative after 1st January 2019. Preoperative and perioperative data were collected with respect to demographic data, medical history, medications, and surgical and anesthesia data. Chi-square test or Student t test was used to preliminarily screen out suspected risk factors. Then, multiple logistic regression analysis was utilized to further determine the risk factors of DVT after knee arthroscopy.Results: During the study period, 272 patients were reviewed. Among these patients, 21 cases of DVT occurred, resulting in an incidence of 7.7%, two (0.74%) of which were identified as symptomatic thrombosis. The incidence of DVT in the anticoagulant group was 7.9%, and 7.4% in the non-anticoagulant group, respectively. The use of low molecular weight heparin postoperative did not reduce the incidence of DVT after knee arthroscopy. An increased D-dimer level could be an early marker for an elevated risk of postoperative DVT. No association between different arthroscopic procedures and thrombotic events. And the tourniquet time are not related risk factor.Conclusions: In this study, the early incidence of DVT after knee arthroscopy was 7.7%. Symptomatic DVT was rare and occurred infrequently. The incidence of DVT within three days could not be reduced by using LMWH, and a high D-dimer level was an early marker for DVT after knee arthroscopy.

Purpose: To investigated the early incidence of deep venous thrombosis (DVT) and its risk factors after knee arthroscopic surgery in patients with anticoagulant and non-anticoagulant.Methods: 272 patients were reviewed who have undergone knee arthroscopic surgery in our hospital from January 2018 to October 2019. Color doppler ultrasound was performed for every patient at 24h preoperatively and three days after operation. On the first day after surgery, low molecular weight heparin (LMWH) was randomly administered to some patients and not in others. The following factors were recorded: gender, age, body mass index (BMI), preoperative platelet and D-dimer level, D-dimer level three days after surgery, anesthetic technique, tourniquet time, whether to use LMWH after operation, and type of surgical procedures. Chi-square test or Student t test was used to preliminarily screen out suspected risk factors. Then, multiple logistic regression analysis was utilized to further determine the risk factors of DVT after knee arthroscopic surgery.Results: The incidence of DVT in the postoperative anticoagulant group was 7.5%, and 7.4% in the non-anticoagulant group. An increased incidence was found among higher D-dimer level postoperatively. There was no significant difference in the incidence of DVT between use of LMWH and non-use of LMWH in three days after surgery.Conclusion: The early incidence of DVT in the group of patients without LMWH was 7.4%. The incidence of DVT in patients with knee arthroscopy surgery could not be reduced by using LMWH within three days, and high D-dimer level was a risk factor for DVT after knee arthroscopic surgery.