Changes in blood biochemistry thrombosis parameters 24 hours after stent-assisted endovascular treatment of intracranial aneurysms

Background and purpose This study aims to elucidate the early changes in blood biochemistry thrombosis parameters following stent-assisted endovascular treatment of intracranial aneurysms.Methods Consecutive patients with unruptured aneurysms undergoing stent implantation during endovascular treatment were included in this prospective study with approval from the local ethics committee. Blood samples were collected immediately before and 24 h after the procedure for biochemical analysis, including basic thrombosis indicators, bleeding tests, and a complete blood count.Results The study included 80 patients (60 women, 20 men) with 134 aneurysms. A total of 135 stents (110 flow-diverting, 25 standard) were used. Additionally, intrasaccular coiling was utilized in 28 aneurysms among 27 patients. Following the procedure, there was a significant decrease in activated partial thromboplastin time, fibrinogen, hemoglobin, and platelet levels, and a significant increase in prothrombin time, D-dimer, von Willebrand factor (vWF) activity/antigen ratio, and leukocyte levels in all patients. Correlation analyses revealed significant positive associations between platelet and fibrinogen levels, and a negative association between D-dimer and fibrinogen levels in the coil (-) group. Additionally, there was a significant negative correlation between aneurysm volume and vWF activity/antigen ratio, and procedure duration and thrombocyte count, while a positive association was found between aneurysm number and leukocyte count in the coil (-) group.Conclusions Analysis of blood chemistry alterations indicates that intravascular thrombosis occurs in the intracranial circulation following stent-assisted endovascular treatment of intracranial aneurysms. This thrombotic process is more pronounced in patients whose aneurysms were left open (i.e. flow-diverting stent alone).