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The private medical cardiological practice


in  the  Center  of  Düsseldorf

color duplex ultrasond of vessels

Duplex sonography is an ultrasound method that is used in the diagnosis of diseases of the blood vessels.

Most commonly the carotid artery or the vessels of the arms and legs are investigated.

Duplex sonography is used for the diagnosis of vascular disease.


For the following diseases, the investigation is used:


- Atherosclerotic vascular changes

- vasoconstriction (called stenosis)

- Follow-up after vascular surgery

- inflammatory vascular disease

- thrombosis

- screening for vascular risk factors (dyslipidemia, diabetes mellitus ...).



Dr. med. Danny T. Nguyen

Friedrichstr. 13-15

40217 Düsseldorf   

phones: 0049 (211) 830 850 50

fax:       0049 (211) 830 850 52



opening times:
Mo, Tu and Th:     08:00 - 18:00
We and Fr:           08:00 - 12:00
and by appointment




The duplex sonography, the carotid arteries are examined by ultrasound. It is thus possible to detect thickening of the intima of the carotid artery at an early stage and even before the formation of calcium deposits in the vessels. One can determine the "vascular age" so to speak. The walls of the carotid artery are displayed and measured at a representative point repeatedly.


From this result it is possible to draw conclusions about further changes in the rest of the vascular system in many cases and thus the risk for cardiovascular disease can be estimated.

A focus of color duplex examination of the carotid arteries and other vessels supplying the brain is, that the flowing blood visible and can be made ​​audible.

Constrictions can thus be reliably detected. This is to clarify, eg blurred vision, dizziness or after strokes one of the main research method.

This examination is painless and without any radiation exposure.



is a measurement of the thickness of tunica intima and tunica media, the innermost two layers of the arterial wall. IMT is used to detect the presence of atherosclerotic disease in humans. Normally the intima of the carotid arteries is less than 0.7 mm thick. A disease in the form of arteriosclerosis or hypertension occurs, when the intima is thicker than 0.8 to 0.9 mm, or even if slight constrictions are recognizable.

The carotid arteries in the carotid-intima thickness determination  are very easy to find from the outside with the ultrasound device and examine.



the color duplex sonography of the renal arteries is defined as the ultrasound examination of the renal vessels. This investigation is carried out, especially in the context of a high-pressure diagnostics to exclude narrowing of the renal arteries. Such vasoconstriction can lead to the development of hypertension.


In the abdominal vessels, especially the aorta is considered. Here aneurysms (enlargements of the artery) can be discovered, which can result in cracks such as life-threatening bleeding complications in everyday life. Similarly, one can with the ultrasound to prove the calcification state of the aorta, allowing an early find evidence of atherosclerosis.



With this sonographic examination constrictions in the pelvic and leg arteries can be detected. The patient experiences through such constrictions of arteries in brisk walking a muscle pain either in the buttock, thigh or in the calf area. He stops, the symptoms ("showcase disease") better.


Often this occurs in patients, for example, also have diabetes mellitus or are a smoker (smoker's leg).

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