Percutaneous arterial catheterization is a widely used technique for continuous hemodynamic monitoring and arterial blood gas analysis. There are various complications such as hemorrhage, hematoma, infection, and thrombosis. We performed a catheterization procedure to confirm that the lateral circulation of the radial artery was sufficient. The arterial blood pressure waveform was damped after catheterization. Immediately after removal of the catheter, ultrasonography and Doppler were used to confirm the formation of total thrombus in the radial artery. A thrombus was found in the radial artery and disappeared at 3 days postoperatively.