What can be detected by carotid artery color ultrasound?

Carotid artery color ultrasound is a non-invasive examination method, mainly used to evaluate the structure and blood flow of the carotid artery, and help diagnose vascular diseases such as atherosclerosis, plaque formation, stenosis or occlusion. Through ultrasound imaging, doctors can clearly observe the thickness of blood vessel walls, blood flow speed, and the presence of blood clots or plaques, thereby predicting the risk of stroke or guiding treatment plans. The examination results are of great significance for early screening and intervention of cardiovascular and cerebrovascular diseases.

1. Core examination contents of carotid artery color ultrasound

Carotid artery color ultrasound mainly detects the following three types of problems:abnormal blood vessel structure(such as intimal thickening, plaque),Hemodynamic changes(such as increased flow velocity due to stenosis) andRisk of complications(For example, plaque shedding causes cerebral infarction). For example, if the examination shows that the carotid artery intima-media thickness (IMT) exceeds 0.9 mm, it may indicate early arteriosclerosis; while mixed echogenic plaques need to be alert to the risk of thrombosis. In addition, color Doppler ultrasound can differentiate between stable plaques (calcified type) and unstable plaques (soft plaques), which are more likely to rupture and cause acute events.

2. Clinical significance and disease correlation

Carotid artery color ultrasound results are closely related to a variety of diseases. For example,Carotid artery stenosis exceeding 50%It may cause insufficient blood supply to the brain, causing dizziness or transient ischemia (TIA); if combined with high blood pressure or diabetes, the risk will be further increased. For patients who have had a stroke, color ultrasound can trace the cause, such as whether plaque shedding caused embolism. In addition, the test can evaluate postoperative effects (such as restoration of blood flow after stent placement) or monitor plaque stability after drug treatment.

3. Applicable groups and inspection recommendations

It is recommended that the following groups undergo regular carotid artery color ultrasound screening:People over 40 years old with a family history of cardiovascular and cerebrovascular diseases,"Three high" patients(hypertension, hyperlipidemia, diabetes),long term smokerandThose who have unexplained headaches or fainting. The examination does not require fasting, the whole process takes about 15-20 minutes, and there is no risk of radiation. However, it should be noted that mild stenosis (<30%) may not require treatment and only requires lifestyle modification; while severe stenosis (>70%) may require surgical intervention.

4. Summary and precautions

Carotid artery color ultrasound is a "window" to prevent cardiovascular and cerebrovascular events and can detect potential risks early, but it needs to be combined with other examinations (such as CTA or DSA) for further diagnosis. Avoid wearing jewelry on your neck before the examination, and cooperate with the doctor to rotate your head to ensure clear imaging. Interpretation of results must be completed by professional physicians and avoid judgment on your own. Healthy people can be screened every 2-3 years, and high-risk groups are recommended to be reviewed every year.

Quote sources:
1. "Chinese Journal of Ultrasound Medicine" 2021 Carotid Artery Ultrasound Examination Guidelines
2. American College of Cardiology (ACC) recommendations for the diagnosis and treatment of atherosclerosis
3. Ultrasonic equipment produced by General Electric (GE), Philips (Philips) and other manufacturers (such as GE Logiq series, Philips EPIQ)