synonymAngiography(Medical auxiliary examination technology) generally refers to angiography technology
Angiography, an interventional detection method, willDeveloperinjectionblood vesselLi.becauseX-rayUnable to penetrate the developer,AngiographyIt is by this feature that theimageTo diagnose vascular disease.
Angiography is an auxiliary examination technology. In the modern era of advanced technology, angiography technology is widely used in the diagnosis and treatment of various clinical diseases, which helps doctors find the condition in time, control the progress of the disease, and effectively improve the survival rate of patients.Angiography is a kind of interventional detection method. The developer is injected into the blood vessel. Because X-ray cannot penetrate the developer, angiography can accurately reflect the location and extent of vascular lesions.But angiography is also an invasive examination, and there are many allergic reactions:
① Immediate allergic reaction: including itching, urticariaAngioedema、Bronchospasm, hypotension and syncope, the most common is urticaria.Most of these reactions are self limiting, and are sensitive to adrenergic andAntihistamineThe reaction is rapid, but the possibility of fatal occurrence cannot be ignored.
② Delayed anaphylactic reaction: anaphylactic reaction occurring 1~3 days after contrast agent injection, mainly manifested asskin ItchAnd hives.
Universally usedAngiographic agentIt is an iodine reagent, which can be used in rare cases with contraindications to the use of iodine reagentcarbon dioxideAs contrast agent.
Specific operation
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In order to complete the examination under the best sanitary conditions, you must be beside the examination table and put a disinfection sheet on it.Nurses and doctors must be present throughout the examination.After local inguinal anesthesia, a fine needle was inserted into the artery.Insert the guide wire into the blood vessel through a fine needle.The function of the guide wire is to guide the synthetic catheter to the required position under exposure.The blood vessels of different organs can be displayed by injecting iodized contrast agent through catheter.After taking out the catheter, use bandage and dressing to bind the puncture site for hemostasis.
Angiography usually refers to numbersSubtraction angiographyDigital subtraction angiography (DSA) refers to the technology that uses computers to process digital image information to eliminate bone and soft tissue images and make blood vessels clearly displayed.Nuldelman obtained the first DSA image in 1977, which has been widely used in clinical practice, replacing the old generation of non subtraction angiography methods.In recent years, flat panel DSA has been developing faster and faster, and its image quality and doctor-patient safety have also been continuously improved. A new generation of diagnostic equipment, represented by Siemens Artis zee series digital flat panel DSA, has emerged, providing new digital technology for clinical cardiovascular diagnosis and treatment.
DSA imaging mode is divided into intravenous injectionDigital subtraction angiography(IVDSA) andArterial injectionDigital subtraction angiography (IADSA).The former refers to DSA examination by placing catheter or injecting contrast agent into trocar via intravenous route, which can be divided into non selective IVDSA, that is, placing catheter into peripheral vein or superior vena cava to display arterial image, and selective IVDSA, that is, placing catheter head in the tested vein or injecting contrast agent into heart cavity to develop.The latter can also be divided into nonSelective arteriographyAnd selective arteriography.Non selective IADSA means that after catheterization via arterial route, the tip of the catheter is placed at the proximal end of the aorta of the target artery and contrast agent is injected for anterograde imaging;Selective IADSA means that the tip of the catheter is further penetrated into the main trunk or branch of the target artery for angiography.
