Duplex scanning in the diagnosis of vascular pathology

Duplex scanning is a combination of traditional ultrasound (b-mode) and Doppler techniques to determine the blood supply and krovotoka. This combination is a highly effective method of diagnosis in modern medicine.

Duplex scanning in phlebology is considered the “gold standard”. Modern phlebology in almost all cases using this technique for diagnosis. Duplex scanning of the veins helps to visualize the vasculature, significant for registering the movement in her blood. Using this method it is necessary not only for diagnosis but also for treatment and prognosis of venous pathology.

There are various approaches to this procedure. The screening approach allows to determine only the main issues, a small amount of ultrasound specialists without first consulting the patient phlebologist can give a detailed description of the condition. Given to examination a small amount of time, about 10 minutes. For example, duplex scanning veins of the lower extremities (complete!) should take 40-50 minutes. For screening of venous pathology can be used ultrasound: it allows to identify the bottlenecks which can then be to examine in more detail in duplex scanning.

More detailed and informative study will duplex scanning of the secondary, after visiting the doctor-phlebologist, who will outline the essential questions for decision and clarification. If this procedure is carried out prior to his visit, often there is the need for re-implementation, as the reception phlebologist appear unresolved issues.

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At the reception is carried out first inspection of the feet to determine areas that need special attention. The examination should be carried out in the supine position (better seen deep veins), and standing (in this case – surface). Using the sensor inspected every inch of his feet. There are preclinical stage of the disease, which can be determined only by ultrasound.

Venous pool of the lower extremities includes 26 veins on each side. Are frequently altered in diseases of the veins of the foot.

As mentioned, duplex scanning a combination of ultrasonic b-mode and Doppler. In the b-mode device radiates the ultrasound of a certain frequency that penetrates through tissue. The border tissue of different densities causes the reflection of the ultrasound and his return back to the sensor. This sensor uses a pulsed. The greater the distance between the sensor and the border, the more time passes from the radiation of the ultrasound before his capture. Thus, scanning and two-dimensional reconstruction of the investigated vessels. Doppler mode is based on the same effect: the ultrasound in a collision with a moving particle not only affects, but also changes the frequency, and the change of this parameter is proportional to the speed of a moving object. The study of the vascular network driving objects – the red blood cells. At the present stage it is possible to build a color cartograms flow in a vessel in which is encoded the intensity and the direction of blood flow using color. This method – color Doppler mapping.

Using these two modes you can get information about the anatomy of the vessels, condition of the walls and gaps, assess changes in themselves, to monitor hemodynamic changes. In addition, this method is non-invasive and allows to make a diagnosis of a significant number of vascular diseases.