山梨医科大学雑誌　第7巻1号　019-034(1992)

Structures and Flow Dynamics of False Lumen in Aortic Dissection:
Transesophageal Color Flow Doppler Ultrasonographic Study

Shoji SUZUKI

Abstract: Seventeen patients with aortic dissection, three with DeBakey type I, two with type II, twelve with type III, were studied by transesophageal color flow doppler ultrasonography. The structures of dissected aorta, flow dynamics in false lumen, and changes in ultrasonographic findings during follow-up periods were observed.
A tri-luminal structure was revealed; and blood flow through the initial tear and re-entry site, biphasic flow, stagnant flow, and thrombus formation in false lumen were visualized. Spontaneous echoes in false lumen were observed in ten patients. Furthermore, the spontaneous thrombosis of false lumen without surgical intervention, which is regarded as a "thrombo-occluding type dissection", was observed in seven patients.
In conclusion, transesophageal color flow doppler ultrasonography was a convenient and useful method not only for diagnosis, but also for estimating flow dynamics in the aortic dissection. It also contributed to satisfactory follow-ups.

Key words: Aortic Dissection, Transesophageal color flow doppler ultrasonography, Tri-luminal structure of dissected aorta, Spontaneous echoes in false lumen, Thrombo-occluding type dissection




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