9. The brain is supplied by four great vessels the right and left common carotid arteries for – anterior circulation and the right and left vertebral arteries for posterior circulation. The brachiocephalic artery is often called the innominate artery. 10. Digital Subtraction Angiography (DSA) is a computerized feature that removes bony structures from images so the area of interest can be visualized. Guidewires precede catheter placement. These are used as a platform over which the catheter is to be advanced. Introducer sheaths reduce trauma to the vessel by creating one hole and pathway. They allow multiple catheters to have passage through the vessel. Modified Seldinger is the most common catheterization technique. It is modified in that it punctures only the anterior wall. Percutaneous Transluminal Angioplasty is a therapeutic radiologic procedure used to dilate stenotic vessels. Stenosis is the narrowing of a vessel, usually due to atherosclerosis. Occlusion is blockage of a vessel, usually due to atherosclerosis. 11. Angiography is a general term that describes the radiologic examination of vascular structures within the body after the introduction of an iodinated contrast medium or gas. Many types of studies of the vessels can be performed. They usually can be divided into two groups: arteriography or venography. Contrast is a requirement of these procedures because the vessels cannot be visualized without it. These are sterile procedures typically performed by an interventional radiologist or cardiologist. 12. After the area is cleansed, the needle is inserted (usually into the femoral artery using the modified Seldinger method). The needle is withdrawn slowly until there is blood flow. The needle’s inner canulla is removed and a flexible guidewire is inserted. Then the needle is removed. Pressure fixes the wire and reduces hemorrhage. A catheter is slipped over the wire, into the artery. The guidewire is removed, leaving the catheter in the artery. An introducer sheath is used when multiple catheters will need to be inserted during the angiogram.
9. The brain is supplied by four great vessels – the right and left common carotid arteries for anterior circulation and the right and left vertebral arteries for posterior circulation. The brachiocephalic artery is often called the innominate artery. 10. Digital Subtraction Angiography (DSA) is a computerized feature that removes bony structures from images so the area of interest can be visualized. Guidewires precede catheter placement. These are used as a platform over which the catheter is to be advanced. Introducer sheaths reduce trauma to the vessel by creating one hole and pathway. They allow multiple catheters to have passage through the vessel. Modified Seldinger is the most common catheterization technique. It is modified in that it punctures only the anterior wall. Percutaneous Transluminal Angioplasty is a therapeutic radiologic procedure used to dilate stenotic vessels. Stenosis is the narrowing of a vessel, usually due to atherosclerosis. Occlusion is blockage of a vessel, usually due to atherosclerosis. 11. Angiography is a general term that describes the radiologic examination of vascular structures within the body after the introduction of an iodinated contrast medium or gas. Many types of studies of the vessels can be performed. They usually can be divided into two groups: arteriography or venography. Contrast is a requirement of these procedures because the vessels cannot be visualized without it. These are sterile procedures typically performed by an interventional radiologist or cardiologist. 12. After the area is cleansed, the needle is inserted (usually into the femoral artery using the modified Seldinger method). The needle is withdrawn slowly until there is blood flow. The needle’s inner canulla is removed and a flexible guidewire is inserted. Then the needle is removed. Pressure fixes the wire and reduces hemorrhage. A catheter is slipped over the wire, into the artery. The guidewire is removed, leaving the catheter in the artery. An introducer sheath is used when multiple catheters will need to be inserted during the angiogram.
Vascular_Cardiac_script.docx