What are the ultrasound findings of upper extremity venous thrombosis?

Ultrasound examination of upper extremity venous thrombosis typically uses ultrasound equipment to perform real-time imaging of the patient's upper limb, allowing observation of blood flow changes within the vessels, as well as the morphology and location of the thrombus. Specific analyses are as follows:

1. Blood Flow Changes

In ultrasound images, upper extremity venous thrombosis usually appears as slowed or completely obstructed blood flow. Ultrasound can use color Doppler or Doppler flow imaging to display the velocity and direction of blood flow. If reduced blood flow velocity or absence of flow signals is detected in the upper extremity veins, this may indicate the presence of a thrombus.

2. Thrombus Morphology

In ultrasound images, upper extremity venous thrombi appear as linear or spindle-shaped echogenic areas, often with irregular shapes. The thrombus may present as a hyperechoic region, typically accompanied by absence of blood flow signals.

3. Thrombus Location

Upper extremity venous thrombosis can occur in various venous segments, including the subclavian vein, brachial vein, radial vein, and ulnar vein. Ultrasound can precisely locate and mark the position of the thrombus, and can also estimate its length and extent.

In addition, other features such as deep vein compressibility can also be assessed. It should be noted that ultrasound is a commonly used non-invasive diagnostic method with high sensitivity and specificity for diagnosing upper extremity venous thrombosis. However, the final diagnosis should be made by a qualified physician based on a comprehensive evaluation of clinical symptoms, laboratory tests, and other imaging findings.