CT contrast scan

CT angiography is a method of performing an angiography of an organ or structure before scanning. For example, injecting iodine to 8-10 ml or injecting air 4-6 ml into the cerebral cistern for cerebral angiography and scanning, which is called cerebral angiography CT scan, can clearly show the cerebral cistern and small tumors therein. Perform an angiography of the organ or structure and then scan again. Basic Information Specialist classification: growth and development check classification: CT Applicable gender: whether men and women apply fasting: not fasting Tips: Before the examination, abdominal, pelvic and enhanced scans should be performed. Fasting should be performed 6 hours before the scan, and the morning should be fasted. Normal value There were no lesions and abnormalities in the angiography. Clinical significance Abnormal results can be displayed by CT scan of the head examination to show the gray matter and white matter of the brain tissue, the ventricular system and the subarachnoid space, which can directly display changes such as brain tumor, cerebral hemorrhage and cerebral infarction; the lung examination can clearly show the fine texture of the lung; The shape, contour and lesions of the liver, spleen, pancreas, kidney, adrenal gland, etc. can be clearly displayed, which are not displayed by ordinary X-ray examination. CT examinations provide a true cross-sectional image that does not have overlapping images of different organ lesions, which can interfere with observation and provide details of the organs and lesions examined. Patients who need to be examined for brain tumors, cerebral hemorrhage, cerebral infarction, lung disease, liver, spleen, pancreas, kidney, adrenal gland and other organ diseases. Precautions Before the examination: abdominal, pelvic and enhanced scanning examination, fasting 6 hours before the scan, check the morning fasting. Remove metal objects from the part to be inspected. Such as hairpins, keys, coins and buttons containing metal substances to prevent the occurrence of counterfeit shadows. For patients who do not affect cooperation, such as infants and young children coma, sedatives must be given in advance. After the examination: the dose of iodine contrast agent used in CT examination is large, the injection speed is fast, and the incidence of adverse reactions is high, especially the incidence of patients with specific allergies is higher, and severe cases can be life-threatening. The medical staff must closely observe the patient's condition during and after the injection. Once an adverse reaction occurs, proper treatment and care are very important. Inspection process 1. Do a good job of preparing the patient: Prepare the patient according to the requirements of different parts. Iodine allergy tests must be performed on patients who need to be augmented. Explain to the patient: Eliminate fear and make the patient cooperate with the examination. 2, the choice of scanning conditions: including body position, layer thickness and layer spacing, scanning parameters and scanning methods. Not suitable for the crowd Unsuitable people: iodine allergies, severe liver and kidney dysfunction, severe thyroid patients, acute pancreatitis, acute thrombophlebitis, multiple myeloma and other heterogeneous proteinemia, severe cachexia. Use with caution in patients with high risk factors, such as poor renal function, diabetes, asthma, urticaria, eczema, other allergic diseases, heart disease, other drug allergies, children under 1 year old and elderly over 60 years old.