IR Removal Flashcards
highly specialized medical equipment whose properties interact with that of the catheter to produce a safe and accurate method of catheter placement.
Guidewires
The basic characteristics of a guidewire include
length, diameter, tip shape, core stiffness, taper, and coating.
Standard Guidewire length
Standard guidewires are 145 cm long, (4 to 5 feet)
often used because it is less traumatic, leading with a smooth curve rather than a straight tip, which can catch on atheromatous plaques and vessel origins.
J Tip
The curve is described by its radius, usually ranging from __ to __ and chosen to match the size of the vessel.
1.5 to 15mm
The outer diameter of the coil is the width of the guidewire and usually is expressed in inches
(0.018- inch, 0.035-inch, 0.038-inch).
The standard diameter for guidewires used in diagnostic arteriography is
0.035 inches
is the prime determinant of a guidewire’s overall stiffness.
MANDRIL/MANDREL CORE
Why most standard guidewires are coated with Teflon?
to allow easy travel of the catheter over them.
used to reduce wire thrombogenicity.
Heparin based coatings
when wet, have an extremely low coefficient of friction.
hydrophilic polymer coatings
All-purpose wire for navigating large to medium vessels, abscess cavities, etc.
Newton (Guidewire)
Newton Stiffness
Medium
Useful for visceral artery exchanges where extra (short support needed)
Rosen
Rosen Stiffness
Stiff
Rosen Stiffness
Stiff
Bentson Tip and Stiffness
Straight with floppy tip / Very stiff
good for crossing with small, tortuous vessels or stenosis
Bentson
to guide large, stiff with catheters such as angioplasty balloons, stents, or relatively IVC filters, and for catheter exchanges
Amplatz
Straight with relatively soft tip, Very stiff
Amplatz
0.014-in. to 0.038-in. diameter. To guide the catheter into place during CVC (central venous catheter) insertions.
Glidewire
Core stiffness – Soft to Stiff
Coating – Hydrophilic
Tip – Straight or angled
Glidewire
0.010-in. to 0.018-in. diameter, made of steel, platinum, or nitinol
Steerable
Core stiffness – Soft to Stiff
Coating – Teflon / Hydrophilic
Tip – Shapeable
Steerable
It required the following, needles, wires, catheters, balloons, and stent.
also are invaluable tool for interventionist.
CATHETERS
It consists of a hub at the rear end and a distal tubular shaft.
Catheter
should have strength, good torque control, radiopacity, flexibility, an atraumatic tip, and low surface friction for good trackability over a guidewire.
Ideal Catheter
are the most important tool in any vascular intervention.
angiographic catheters
is easy to shape and is commonly used.
Polyethylene
Chemical Name of Teflon
polytetrafluoroethylene
is slippery and can be used for passing through scar or graft material.
Teflon
has good stiffness and torque-control characteristics
Nylon
The most commonly used diagnostic catheters are
4fr to 5fr
size of Diagnostic Ctheters and Coaxial Micro Catheters
3Fr / 2fr to 3fr
is on the trailing end and is where syringes and injectors can be attached and wires
Hub
provides length to the catheter to enable it to reach the target vessel.
Shaft
of the catheter is tapered to fit the guidewire and facilitate atraumatic percutaneous insertion.
Tip
Basic catheter used to study vessel punctured or vessels with straight take offs
Straight
Large internal diameter, high flow capacity. Effective and safe method ofdraining pleural fluid.
Pig tail
use for temporary ureteral occlusion and applications including, renal opacification, dislodgment of calculi and preventative calculi migration.
Large internal diameter, high flow capacity.
Berenstein
helps in the cannulation of visceral arteries, such as renal, bronchial, or celiac arteries. Visceral Catheter
Cobra
selective cervico cerebral artery catheterizations Requires reformation in the aortic arch or aortic bifurcation. for delivering contrast agents
Simmons
useful for crossing aortic bifurcation
Mikkaelson
