How to select the proper injection rate for an arteriogram? The easiest way to select the proper rate is to give a test injection of contrast agent by hand to estimate the rate of flow. The injection rate should approximate the intrinsic rate of flow of the vessel. Giving a test injection is always prudent …
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What is Road Mapping in fluoroscopy? “Road mapping” is an imaging technique present on many modern fluoroscopy units. An arteriogram is performed first. When the road map function is selected, the fluoroscopy monitor displays a static subtracted angiographic image from this prior run. When fluoroscopy is performed, a real-time subtracted fluoroscopic image is superimposed on …
What is a Waltman loop? The distal tip of any catheter can be looped back to form a reverse curve catheter. A Waltman loop is the configuration of a standard catheter when the distal end has been formed into a reverse curve loop. The simplest technique to do this involves selection of an aortic branch …
What are the different ways to form a Simmons catheter? One way is first to place a wire over the aortic bifurcation and then form the catheter by placing the tip over the bifurcation and pushing up. The catheter may also be formed in the thoracic aorta where the diameter is sufficiently large. A technique …
What is a reverse curve catheter? A reverse curve catheter is one in which the tip of the catheter doubles back on itself to form a partial loop (. Because of the loop at the end, special maneuvers must often be done to form the loop when the catheter is inside the patient. After the …
What is a Snare medical equipment? A snare is a device that may be used to remove intravascular foreign bodies such as wires or coils. A snare consists of a wire with a nitinol loop at the end. The plane of the loop is oriented perpendicular to the long axis of the wire. The snare …
Advantages and disadvantages of a single wall puncture The single-wall technique is preferred for bypass grafts and for patients at risk for puncture site hemorrhage, such as patients undergoing thrombolysis. The disadvantage is an increased risk for access site vascular dissection.