Fibroscan ultrasound determines the elasticity of liver tissue

The article is professionally consulted by Master, Doctor Doan Xuan Sinh - and Doctor Vu Thi Hanh - Department of Diagnostic Imaging - Vinmec Hai Phong International General Hospital

As a new turning point in the non-invasive diagnostic ultrasound industry, Fibroscan ultrasound to determine the elasticity of liver tissue is a very popular technique worldwide, with high accuracy, ease of implementation, and effective support. in the diagnosis and treatment of diseases.

Tissue elastic ultrasound technique was born in 1991 and has developed strongly in the past 5 years, is an ultrasound technique that evaluates the stiffness of tissue through the degree of elasticity when subjected to muscle force. learn. Tissue elastography allows the assessment of tissue stiffness, creating a second turning point in ultrasound diagnostics and allowing the assessment of the nature of damaged tissue.
Liver tissue elastography technique is a non-invasive diagnostic method, bringing high accuracy, overcoming the disadvantages of biopsy in determining liver fibrosis.
Currently, ultrasound elastography of liver tissue is an effective solution to help identify liver fibrosis most accurately with great advantages such as: Easy to perform, non-invasive, reproducible, high accuracy.

FibroScan ultrasound technique to determine the elasticity of liver tissue can be quite widely indicated in clinical practice to help detect, evaluate stages or monitor the effectiveness of treatment and prognosis of cirrhosis. Fatty liver disease in all patients with chronic liver disease:
Portal hypertension Metabolic diseases Diabetes mellitus, nonalcoholic fatty liver disease, nonalcoholic steatohepatitis Alcoholic liver disease Diseases chronic viral hepatitis Hepatitis B, hepatitis C, HCV-HIV co-infection and co-infection. FibroScan can also be indicated to monitor the effectiveness of treatment and prognosis of patients after liver transplantation, hepatobiliary diseases, screening for chronic liver disease in the community, ...

Technique of ultrasound elastography of liver tissue by applying an external force on the damaged liver parenchyma to cause deformation is called semi-static elastography, also known as deformed elastography. When performing the technique, the sonographer presses the transducer with a certain force to act on the damaged tissue. The principle of elastography is that the liver tissue will deform when pressed. Tissues or lesions will respond in several ways, depending on their mechanical makeup. Normal tissue will deform much with pressure while pathological tissue, which is stiffer, will deform less. Tissue contrast on the elastography is due to tissue stiffness differences, color coded depending on the manufacturer.
Fibroscan ultrasound procedure to determine the elasticity of liver tissue is done as follows:
Step 1: The patient lies supine, right arm raised so that the intercostal space is maximized. Step 2: The hepatic elastography transducer is placed on the skin, in the intercostal space in the right liver area. The patient feels only slight vibration each time an elastic wave is generated by the vibrator. Step 3: The FibroScan ultrasound technique is done in about 5 to 10 minutes and causes no pain or discomfort to the patient. Patients should fast for at least 2 hours before having a FibroScan measurement.

4.1 Advantages Is a non-invasive technique Accurately determine the stage of cirrhosis or liver fibrosis FibroScan ultrasound technique is performed quickly in 10 minutes, does not cause pain or discomfort FibroScan gives quick results, has high accuracy repeat the results very well (excellent) with a correlation coefficient of 0.98. FibroScan has diagnostic accuracy comparable to liver biopsy and its clinical application has been published in more than 700 scientific studies; 4.2 Cons Difficulty in using FibroScan ultrasound if the patient has confounding factors such as: Cholestasis, active hepatitis, liver tumor, obesity, liver obstruction due to heart failure, narrow intercostal space, ascites . FibroScan ultrasound technique can only measure the right liver, not the left liver; High cost FibroScan ultrasound only evaluates liver stiffness and fatty liver, so it cannot completely replace conventional ultrasound. FibroScan should not be used in pregnant women or in patients using a pacemaker.

Evaluation of liver fibrosis by modern elastographic technique of liver tissue is a non-invasive, high-precision diagnostic method equivalent to liver biopsy, which is performed quickly, without pain or any other symptoms. no discomfort for the patient and low cost. This method is a turning point of the ultrasound industry, overcoming the shortcomings of liver biopsy, and is gradually being used widely, giving patients the opportunity to screen for cirrhosis earlier.
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