Trans cranial doppler ultrasound

The article was written by Specialist 2 Confucius Tien Dat, Doctor of Diagnostic Imaging – Department of Diagnostic Imaging – Share99 Ha Long International Hospital.

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Transcranial doppler ultrasound is a non-invasive, painless ultrasound technique that uses high-frequency sound waves to measure the speed and direction of blood flow in brain blood vessels. This test is intended to check and record the rate of blood flow in the cerebral arteries, facilitating the diagnosis and close-up of diseases that can affect this body.

1. What is trans cranial doppler ultrasound?

Transcranial doppler ultrasound is a non-invasive diagnostic tool using ultrasound waves to measure blood flow in the brain. The brain is considered the control center of activities in the body. Although the function of the brain depends on other agencies, the brain still plays a role in controlling almost any activity. It is millions of cells and nerves that are connected to other agencies, ordering to take the necessary actions to continue life.

Due to high-intensity metabolic function, the brain requires at least 20% oxygen coming from the heart through a tight vascular network. If the amount of blood coming to the brain is too much, an increase in incranial pressure occurs and can lead to tissue damage. Cons, if the amount of blood coming to the brain decreases, the brain cuticular tissue is not provided with enough nutrients, which becomes functional and necrosis.

At this time, transcranial doppler ultrasound can help assess degenerative conditions, blockages of arteries or other problems that affect blood flow to the brain. As a non-invasive image test, ultrasound using probes is moved around to different areas of the skull, ultrasound waves bounce through red blood cells that travel in blood vessels. Accordingly, the speed of the blood stream will be measured without creating any image like other types of ultrasound. At the same time, the trans-skull doppler ultrasonic kit is also handyly carried out in bed and the patient is also completely awake during the procedure.

Trans cranial doppler ultrasound

Trans cranial doppler ultrasound

2. Who should be prescribed trans-skull doppler ultrasound?

Trans cranial doppler ultrasound should be recommended for patients with the following risk factors:

  • High blood cholesterol levels: People with high levels of triglycerides or blood cholesterol are more likely to develop cerebral vascular stenosis due to the accumulation of plaque on the walls of the arteries.
  • Cardiovascular disease: A person diagnosed with cardiovascular disease may have had damage to the arteries so it will have a significant effect on the blood supply to the brain.
  • Diabetes mellitus: This pathology can lead to nerve damage and kidney disease, which can cause abnormal hypertension. At this time, high blood pressure increases the risk of a stroke.

Stroke symptoms

People with stroke diseases with cerebral infarction
  • Sickle cell anemia: This is a genetic disease characterized by the presence of red blood cells shaped like sickles rather than round. Sickle cell anemia reduces the number of oxygen-carrying red blood cells. These cells can also cause vascular embolitis, resulting in a diminished blood supply to the brain. People with sickle cell anemia are also at increased risk for pulmonary hypertension and stroke.
  • Embolism: Embolism occurs when thromboembolysis, air bubbles or any insoluble substance in the blood move in the heart of the blood vessels and cause blockages.

In addition, in rare cases, trans-skull doppler ultrasound may also be recommended for patients who have experienced trauma such as accident or violence. These types of injuries can cause hemorrhages in the brain and increase incranial pressure. Furthermore, this medium can also be used for follow-up after interventional surgeries in brain mesthene tissue as a standard for evaluatine success.

3. How to perform trans-skull doppler ultrasound?

Before performing a trans-skull doppler ultrasound, the patient does not need any special preparation, including diet or prior fasting.

During the procedure, the patient remains completely conscious and lying in bed. A small device called a probe is connected to a laptop, providing technicians or doctors with ultrasound data on blood flow in brain blood vessels. It is possible that one or more probes will be placed directly on the patient's skin with a small amount of gel that facilitates ultrasound. The technician will apply the gel and place the probe on the crown, the base of the skull at the back of the neck area or on the closed eyelids of the patient.

At each position on the skull, the technician will adjust the direction of the probe to direct the ultrasound waves towards the blood vessels being examined. A trans-skull doppler ultrasound can take between 30 minutes and 1 hour to complete. After that, the gel on the skin can be easily washed and the person is seated up, returning to life as usual.

Trans cranial doppler ultrasound

Simulation of transcranial doppler ultrasound process

4. What are the results of trans cranial doppler ultrasound?

One result of normal transcranial doppler ultrasound is when blood flow to the brain is normal, there is no narrowing or blockage in blood vessels to the brain and in the brain.

In contrast, a result of abnormal transcranial doppler ultrasound is when there is anything that narrows or clogs the arteries in the brain. This condition will be encountered in the following conditions:

  • Transient stroke or ise anemia
  • Srachnoid hemorrhage
  • Brain aneurysm
  • Increased in cranial pressure
  • Sickle cell anemia

Results of trans cranial doppler ultrasound

Results of trans cranial doppler ultrasound

Sometimes after performing transcranial doppler ultrasound techniques in some cases the doctor will need to coordinate further with other examination techniques such as computerized scans of the brain's cranial vessels or resonance from the brain's vascular or background digital anethlonization (DSA) to supplement information about the cranial encepharanial encepharanial and blood vessels in the brain.

In summary, thanks to the advantages and utilities that bring, transcranial doppler ultrasound is a useful tool to help survey the cerebral vascular system. Thereby, patients are better treated and screened, contributing to protecting brain skin health in particular and comprehensive health in general.

With more than 14 years working in the field of diagnostic imaging BSCK II Giant Tien Dat is currently the Imaging Doctor of Share99 Ha Long International Health Hub.

To register for examination and treatment at Share99 International Health Hub, you can contact Share99 Health System nationwide, or register for an online examination HERE

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About: John Smith

b1ffdb54307529964874ff53a5c5de33?s=90&r=gI am the author of Share99.net. I had been working in Vinmec International General Hospital for over 10 years. I dedicate my passion on every post in this site.

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