A Study of Doppler Waveform Using Pulsatile Flow Model
Journal of the Korean Radiological Society
; : 225-232, 1997.
Article
in Korean
| WPRIM (Western Pacific)
| ID: wpr-81344
Responsible library:
WPRO
ABSTRACT
PURPOSE:
Through the construction of a pulsatile flow model using an artificial heart pump and stenosis to demonstrate triphasic Doppler waveform, which simulates in vivo conditions, and to evaluate the relationship between Doppler waveform and vascular compliance. MATERIALS ANDMETHODS:
The flow model was constructed using a flowmeter, rubber tube, glass tube with stenosis, and artificial heart pump. Doppler study was carried out at the prestenotic, poststenotic, and distal segments; compliance was changed by changing the length of the rubber tube.RESULTS:
With increasing proximal compliance, Doppler waveforms show decreasing peak velocity of the first phase and slightly delayed acceleration time, but the waveform itself did not change significantly. Distal compliance influenced the second phase, and was important for the formation of pulsus tardus and parvus, which without poststenotic vascular compliance, did not develop. The peak velocity of the first phase was inversely proportional to proximal compliance, and those of the second and third phases were directly proportional to distal compliance.CONCLUSION:
After constructing this pulsatile flow model, we were able to explain the relationship between vascular compliance and Doppler waveform, and also better understand the formation of pulsus tardus and parvus.
Full text:
Available
Database:
WPRIM (Western Pacific)
Main subject:
Rubber
/
Pulsatile Flow
/
Compliance
/
Constriction, Pathologic
/
Flowmeters
/
Acceleration
/
Glass
/
Heart, Artificial
Language:
Korean
Journal:
Journal of the Korean Radiological Society
Year:
1997
Document type:
Article