Interventional Radiology Flashcards
what is interventional radiology
use of fluoroscopic imaging to guide minimally invasive procedures that traditionally require major surgery
what does interventional radiology involve
- guide wires
- intravascular access and manipulation
- contrast agents
- engineered implatns with specific functions
how are guide wires used (4)
- flexible atraumatic wires
- introduced into body cavities, vessels, or lumens
- over which catheters and other devices are fed
- to gain access to the cavity, vessel or lumen
what are examples of guidewires
small bore guide-wire assisted chest drain placement
what are the sizes of dog ureters
2.0mm diameter
what are the sizes of cat ureters
0.4mm diameter
what is a ureterotomy
incision into ureter
what are the complications of a uretotomy
leakage
stricture
re-obstruction
high mortality rate
what are ureteral stents
A ureteral stent is a device designed to maintain the flow of urine from the kidney to the bladder when the ureter becomes obstructed.
It is placed within (inside) the ureter to act as a conduit for urine flow. It is typically a double-pigtail design, meaning that the ends are curled to prevent movement from the kidney or bladder.
what are the advantages of ureteral stents
no maintenance
what is a SUB
subcutaneous ureteral bypass
what does a SUB entail
nephrostomy tube buried subcutaneously and empties into the bladder
subcutaneous access port for flushing and sampling
what are the indications for a SUB system (2)
- ureteroliths
- ureteral stricture
why use a SUB over a stent (3)
- easier to place
- can sample urine and flush
- but requires maintenance
how are SUBs placed
under fluoroscopic guidance using guidewires
