It was reported that air embolism and st segment elevation occurred.The 90% stenosed target lesion was located in the moderately tortuous and moderately calcified vessel.An opticross hd imaging catheter was selected for ultrasound examination of the target lesion.During the preparation, the device was difficult to flush but was able to flush eventually.The catheter was inserted and produced a good image.However, the physician considered it had air contamination, so it was removed and was flushed again outside the patient's body.The catheter was inserted again, however, during pullback, it had air contamination again and was flushed again while inside the patient.After that, st segment elevation occurred.No action was taken, and issue was resolved.The procedure was completed with this device and no further patient complications were reported.
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