What does edf of B-ultrasound mean?

B-ultrasound is one of the commonly used examination methods in clinic, which is mainly used to understand the condition of the body organs of the subjects. In B-ultrasound examination, doctors usually pay attention to the value of EDF. EDF refers to the time-velocity spectrum, which is an indicator of blood flow. By analyzing the EDF value, doctors can judge whether the blood flow is normal or not.

The measurement of EDF is realized by ultrasonic technology. The doctor will put the B-ultrasound probe on the patient's skin, detect the signal inside the blood vessel through the ultrasonic detector and transmit it to the computer. The computer will process the signal and generate an EDF diagram. Doctors can know whether the blood flow in blood vessels is normal by observing and analyzing EDF diagram.

The normal range of EDF value is usually between 0.5 and 0. If the EDF value is lower than 0.5, it may indicate that the blood flow velocity is too slow and the blood vessels are blocked or narrowed. If the EDF value exceeds 0, it may indicate that the blood flow is too fast, which may be related to diseases such as hypertension. By observing and analyzing the EDF value, doctors can help patients find and treat vascular diseases in time, thus avoiding more serious health problems.