In vivo monitoring of thrombosis in mice by optical coherence tomography

Abstract

The objective of this study is to establish a novel method for continuously monitoring thrombus progression with various outcome measures and to assess the efficacy of antithrombotic drugs in murine thrombosis model in mice. In the study, thrombus was induced in the femoral vein of mice by FeCl 3 and monitored over time by spectraldomain optical coherence tomography (OCT). Three-dimensional images of thrombi with or without heparin as an antithrombotic agent were obtained from OCT angiography. In addition, several parameters of thrombi were analyzed and compared between control and anticoagulant groups. By using OCT, we were able to trace thrombus generation in the same mouse in real time. We found that in our model heparin reduced thrombus size by~60% and thrombus cross-sectional area by 50%. OCT results also show that both time to thrombus size (>0.02mm 3 ) and time to occlusion (>30%) were significantly reduced after heparin addition. This study demonstrates that OCT reliably monitors thrombus generation and progression from various aspects including thrombus size. This enables us to measure the kinetic of thrombosis more accurately, and effectively evaluate the efficacy and activities of antithrombotic drugs.This model may represent a useful tool in antithrombotic drug discoveries in preclinical studies. K E Y W O R D Santithrombotic drugs, mice, optical coherence tomography, thrombosis

Study of ischemic progression in different intestinal tissue layers during acute intestinal ischemia using swept‐source optical coherence tomography angiography

“…The field of view (FOV) is 10 (X direction) Â 4 mm 2 (Y direction). Blood flow signals were extracted from the repeated B-scans using the decorrelation algorithm [29]. Figure 3 shows the intestinal en face OCTA images acquired using SS-OCT.…”