As for the signature of family members, most of them refer to the iodine-containing contrast agent used in CT enhancement at present, and some hospitals also need the signature of family members before using gadolinium contrast agent for nuclear magnetic examination.
When allergic reactions (mainly iodine preparations) occur during the use of contrast media, the first-aid drugs will be handled on the spot, and a nurse will be in charge.
Delayed reaction of contrast agent can also occur, that is, allergic reaction does not occur at that time, but appears several hours after examination or after the patient goes home. Once the above allergic symptoms appear, you should go to the hospital without delay.
Extended data:
merits and demerits
superiority
CT examination has high diagnostic value for central nervous system diseases and is widely used. For intracranial tumors,
CT images of several parts
CT images of several parts
Abscess and granuloma, parasitic diseases, traumatic hematoma and brain injury, cerebral infarction and cerebral hemorrhage, intraspinal tumors and disc herniation have good diagnostic effects and reliable diagnosis.
Therefore, except for cerebral angiography, which is still used to diagnose intracranial aneurysms, vascular dysplasia and cerebral vascular occlusion, and to understand the blood supply arteries of brain tumors, other things such as pneumoencephalography and ventriculography are rarely used.
Spiral CT scanning can obtain fine and clear vascular reconstruction images, namely CTA, which can be displayed in real time in three dimensions, and is expected to replace conventional cerebral angiography.
CT is also valuable in the diagnosis of head and neck diseases.
Such as early detection of orbital space occupying lesions, early cancer of paranasal sinuses, tumor of middle ear and small bile finger, destruction and dislocation of auditory bone, slight destruction of inner ear labyrinth, congenital ear dysplasia, nasopharyngeal carcinoma, etc.
However, for patients with obvious lesions diagnosed by X-ray plain film, CT examination is not needed.
Baidu encyclopedia -CT