Introduction to PCI Flashcards
What are the two types of PCI balloon catheters?
Monorail (rapid exchange wire) and Over the wire
How many lumens do OTW ballon caths have and why?
2
One lumen that runs until the ending of the balloon for inflation/deflation
One lumen that runs the entire length of the cath that serves as the channel for the guidewire
Why were monorail caths developed? (Rapid exchange)
To permit the exchange of balloon catheters by a single operater
What is the percentage over the predicted diameter for compliant balloons when they are inflated over nominal pressure?
10-20% over predicted diameter
What are the advantages of over the wire balloons? (2)
-Distal wire positioning
-Accepts multiple wires, distal port for pressure, contrast injection
What is the advantages of Rapid exchange (monorail) (2)
-Easy use single operator
-Enhanced visualization
How do you select balloon size (diameter and length) before stent placement?
Select a balloon size that is less than 1 to 1 size match of the visual so the lesion is visible for stent placement (2.5 mm balloon in a 3.0 mm vessel)
What are longer balloons useful in? (30-40 mm length)
Dilating long and diffuse narrowing
What are short balloons used for? (10-15 mm length)
Stent expansion to avoid stretching the vessel wall outside the stent
What is the segment diameter reference for conversion of french size to mm?
0.33 times the french size
What is a waist?
The indentation from the stenosis caused by the dilation of the balloon.
What are the size range of PCI guidewires?
0.010-0.014 inches
what is the device needed for introduction of PCI equipment into the guide while allowing contrast injection and pressure measurement through the guide catheter?
Y connecter valve
What is the pressure gauge pressure measured in?
atm or torr or psi
What are the two choices of stents?
DES (drug eluting stent) or bare metal stent
