Special operation of angiography

In order to complete the examination under the best sanitary conditions, you must lay a disinfection sheet next to the examination bed. Nurses and doctors must be present during the whole examination. After local inguinal anesthesia, insert a fine needle into the artery. The guide wire is inserted into the blood vessel through a fine needle. The function of guide wire is to guide the synthetic catheter to the required position under exposure. By injecting contrast agent containing iodine through catheter, the blood vessels of different organs can be displayed. After taking out the catheter, compress the puncture site with bandages and dressings to stop bleeding.

Angiography usually refers to Digital Subtraction Angiography (DSA), which refers to the technology of using computer to process digital image information, 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 clinic, replacing the older generation of non-subtraction angiography. In recent years, the development of flat-panel DSA is getting faster and faster, and the image quality and the safety of doctors and patients are constantly improving. A new generation of diagnostic equipment, represented by Siemens Artis zee series digital flat-panel DSA, has emerged, which provides a new digital technology for clinical cardiovascular diagnosis and treatment.

The imaging methods of DSA are divided into intravenous digital subtraction angiography (IVDSA) and arterial digital subtraction angiography (IADSA). The former refers to intravenous catheterization or trocar injection of contrast agent for DSA examination, which can be divided into non-selective IVDSA, that is, catheterization in peripheral vein or superior vena cava to display arterial images, and selective IVDSA, that is, catheterization in vein or cardiac cavity to inject contrast agent for development. The latter can be divided into nonselective arteriography and selective arteriography. Non-selective IADSA refers to placing the catheter head near the aorta of the target artery after puncture and intubation through the arterial route, and injecting contrast agent for anterograde development; Selective IADSA refers to further puncture of the catheter tip into the trunk or branch of the target artery for angiography.