Intro to IR Flashcards
What is interventional radiography?
sub specialty of radiology that is minimally invasive and has image guided procedures
What are 3 parts of the IR equipment?
Image detector
C-arm
X-ray tube
What is fluoroscopy?
Live visibility of the introduction of guide wires, catheters contrast agent and biopsy needles
What can 3D surface rendering be used for?
3D images aid diagnosis and mapping of vessels
visualisation of tumour feeding vessels
aid embolisation
aid decision making
What are 4 characteristics of iodine?
high atomic number
attenuates x-ray beam
provides high subject contrast in low inherent contrast area
used for vascular examinations
How are risk factors identified before invasive radiological techniques?
Via clinical patient examination, blood tests and pre-procedural checks and protocols
What does CIRSE stand for?
Cardiovascular and interventional radiological society of europe
What are 4 risks?
Non renal adverse reaction
adverse renal effects
coagulation risk
sedation/analgesia risk
What is sedation?
Use of drugs to produce a state of depression of the CNS that enables interventional procedures or treatment to be carried out
What are 5 types of IR procedures?
Arterial
Venous
Reproductive
Neuro
Biliary
What is angioplasty?
Inflation of catheter-mounted balloon within a narrowed blood vessels -> enlarges lumen and improves flow
What is the MoA of angioplasty?
Fractures obstructing atherosclerotic plaque
causes shedding of ECs
Causes fissures in plaque and intima
Stretches media layer
What is post-PTA restenosis due to?
Prolific neointimal hyperplasia
What are vascular stents?
Catheter-mounted metallic intravascular prothesis which are placed in diseased vessels to improve and maintain flow
What are 4 indications for embolization?
Exclusion of potential/actual source of hemorrhage
treatment of vascular malformations
tumour devascularization
adjunct to planned surgery
