The Significance of Doppler Ultrasound Examination
Because ultrasound has the advantages of flexible operation, simple, no radiation, and affordability, it has been widely used in clinics. It is currently the preferred method for liver, spleen, gallbladder, pancreas, urinary system, gynecology, blood vessels, fetal examination…
Even, very small lesions can be found on ultrasound. Interventional ultrasound can also be used for minimally invasive treatment, so ultrasound has become clinically indispensable.
Ultrasound examination can be divided into many categories, mainly divided according to the examination site and technology, including the abdominal ultrasound, pelvic ultrasound, chest ultrasound, vascular ultrasound and so on. The technical division includes two-dimensional inspection, three-dimensional inspection, color Doppler ultrasound diagnostic equipment inspection, etc.
Which kind of ultrasound examination to take depends on the doctor to make the most appropriate choice according to the specific condition of each person.
In terms of clinical application, ultrasound examination allows you to clearly see the cross-sectional image of the lesion and surrounding tissues, and because the displayed picture can be three-dimensional, very similar to the human body structure in anatomy, it is possible to do some preliminary disease early Diagnosis.
For example: Ultrasound examination is specific for non-invasive detection of congenital heart disease, rheumatic heart disease, and myxopathy of the heart. It can replace most cardiac catheterization examinations and is used for the measurement and disconnection of small blood vessels, blood flow direction, and speed.
In addition, ultrasound examination can clearly show the common gallbladder bile duct, hepatic duct, extrahepatic bile duct, pancreas, adrenal gland, prostate, etc., can diagnose tumors <1cm. Further, in obstetrics and gynecology, the placenta can also be positioned to make accurate judgments on fetal development and health, amniotic fluid measurement, etc.
When performing ultrasound examinations, it should also be noted that different ultrasound examinations have different precautions. If they are not done in place, it will affect the examination results. For example, when checking the hepatobiliary, pancreas, adrenal gland and other parts, fasting is required for 12 hours; when checking the bladder prostate, uterine appendix, and pelvic parts, bladder filling is required (ie, holding back urine); those who have done gastrointestinal barium meal fluoroscopy, need to do ultrasound examination after 3 days.
Color Doppler Ultrasound:
- Give a visual overview of flow within the vessel or heart.
- Rapid identification of vessels, valves, turbulent flow.
- Evaluate flow direction and velocity.
- Measure volume and percent vascularity when combined with 3D Mode.
- Guidance for reproducible quantification of flow velocities using Pulsed-Wave Doppler.
- Locate area of stenosis or thrombosis.
- Determine the existence and amount of arterial plaques and associated turbulent flow.
- Find small vessels such as mouse coronary arteries, femoral and arcuate arteries.
- Evaluate blood flow after a stroke or other cases due to impaired blood flow.
- Observe blood flow to major organs such as heart, kidney, liver pancreas, carotid, abdominal aorta, and others.
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