Principles and precautions of CT enhanced examination

What is the principle of enhanced CT examination? If an enhanced CT examination is required, it is necessary to learn more about the details of the enhanced CT examination, below is the principles and precautions of enhanced CT examination.

First, the principle of enhanced CT examination:

Enhanced scanning is one of CT scanning techniques, which uses intravascular contrast agents to scan. Intravenous injection of iodine-containing organic compounds, i.e., contrast agents, generally uses rapid intravenous injection of iodixanol or iohexol to maintain a certain level of iodine in the blood, and enhance the images of organs and lesions to display more clearly. Enhanced scanning is to inject contrast media from a vein (usually anterior cubital vein) into the blood vessel and perform CT scanning at the same time. It can find the lesions that were not found on the plain scan (no intravascular injection scanning), and it is mainly used to identify the lesions as vascular or non-vascular. Vascular clarifies the relationship between mediastinal lesions and the great vessels of the heart, and to understand the blood supply of the lesions is help distinguish between benign and malignant lesions. It gives more comprehensive information about the lesions and facilitates qualitative analysis of the illness. Doctors can carry out more accurate diagnosis.

Second, the precautions for enhanced CT examination:

If you have the following conditions, please do not perform contrast-enhanced CT examination or carry out contrast-enhanced CT examination with caution: those who currently suffer from insufficiency of heart, lung, liver, kidney and thyroid function; have a history of allergy to iodine-containing contrast agents; caused by malignant tumors Starvation consumption state, hypoproteinemia, water and electrolyte imbalance, history of epilepsy or bronchial asthma. If you take biguanide drugs every day, such as metformin, phenformin, etc., please stop 48 hours before the examination and continue until 48 hours after the examination.

Before enhanced CT examination, the informed consent should be read carefully and signed for confirmation.

Drink plenty of water after the examination to accelerate the excretion of contrast media.

Please wait half an hour before leaving the hospital for observation. If you feel uncomfortable after leaving the hospital, please go to the nearest hospital for treatment.

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Post time: Sep-22-2022

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