Friday, September 15, 2006

angio

a diabetic pt with coronary heart disease bilateral leg pain, persistant pain.
Stent him? Angio(?).

Angioplasty is the mechanical alteration of a narrowed or totally obstructed vascular lumen, generally caused by atheroma (the lesion of atherosclerosis). The term derives from the roots "Angio" or vessel and "plasticos" fit for molding. The term has come to include all manner of vascular interventions typically performed in a minimally invasive or percutaneous method.

Most commonly, the Seldinger technique is used to cannulate a blood vessel for access. A guiding catheter is introduced into the arterial (or venous) system and advanced through the system to the location of an obstruction. This in turn is followed by introduction of a guidewire which is advanced though the guide catheter, through the obstruction and extended into the blood vessel lumen beyond the obstruction. Over the guidewire, a balloon catheter is advanced through both the guide catheter and the obstruction. Once in position, the balloon is inflated using high hydraulic pressure so as to force the narrowed vessel lumen to expand, pushing the lesion producing the narrowing outwards. The balloon may also include a stent (compressed over the balloon before expansion) or be followed by a stent/balloon combination so that the expanded stent is left within the previously narrowed lumen to mechanically support patency of the vessel lumen.

Angiography or arteriography is a medical imaging technique in which an X-ray picture is taken to visualize the inner opening of blood filled structures, including arteries, veins and the heart chambers. Its name comes from the Greek words angeion, "vessel", and graphien, "to write or record". The X-ray film or image of the blood vessels is called an angiograph, or more commonly, an angiogram.