Angioscopy
The Angioscopy (Greek: angio = Word Part vascular; consider SCOPEin = investigate) referred to in medicine, the direct endoscopic or virtual endoscopic viewing of vessels, especially of blood vessels and bile ducts .
to form
There are different forms of angioscopy:
- Angioscopy with an angioscope or a special endoscope
- Direct angioscopy (capillary microscopy)
- virtual angioscopy
Angioscopy with an angioscope
technology
The angioscope has as any endoscope with a light source, a fiber optic ( fiber optic ) and a catheter for flushing with saline . With conventional angioscopy, the angioscope is inserted into the blood vessel through a vascular incision. The angioscope is connected to a video camera, which can continuously record the images from inside the blood vessel. A free view of the inner walls of the vessel is ensured by rinsing with saline solution. The blood flow may only be interrupted for a short time (maximum 30 seconds), as otherwise there may be a lack of oxygen in the vessels and the tissues surrounding them.
application areas
Angioscopy of blood vessels (hemangioscopy)
Angioscopy primarily enables an assessment of stenoses and atherosclerotic vascular changes , in particular the morphology and color. It is mainly used to check the coronary vessels (coronary angioscopy) or the carotids (carotid angioscopy) after a coronary or carotid angioplasty . Angioscopy is not a substitute for angiography , but a complementary examination method.
Angioscopy of the biliary tract (cholangioscopy)
Angioscopy of the biliary tract ( cholangioscopy ) enables gallstones to be removed and tissue samples (e.g. tumor tissue) to be taken.
Direct angioscopy (capillary microscopy)
Direct angioscopy (capillary microscopy ) involves viewing blood capillaries close to the surface through the fingernail (subungual) and through the skin with a microscope or a magnifying glass, as well as mirroring the fundus .
Virtual angioscopy
As part of the virtual angioscopy, 3-dimensional vascular representations are created, which are calculated from sectional images (e.g. computer tomograms ).
This text is based in whole or in part on the Angioscopy entry in Flexikon , a wiki from DocCheck . The takeover took place on July 10, 2007 under the then valid GNU license for free documentation . |