Imaging of Circulatory Disturbances Flashcards
What questions are you asking in vascular imaging?
Where is the anatomy?
Is there a leak?
Is there a blockage? (is the occlusion / stenosis important?)
Can it be fixed?
Imaging that looks at anatomy
Plain films
Contrast angiography
USS
CT/MRI
Imaging that looks at function
Radionucleotide imaging
MRI functional imaging
USS
Problems with iodinated contrast
Major reactions Renal dysfunction Disturbance of thyroid metabolism Disturbance of clotting Seizures Pulmonary oedema
How does catheter angiography work?
Vessel punctured and catheterised
Sterile procedure
Contrast injected using pump injector
Images acquired
When to use angioplasty?
Short stenosis or occlusions
Sessile / concentric plaques
What negative contrast agent is useful in patients with poor renal function or sensitivity to iodinated contrast agents?
CO2
Problems with angioplasty
Occlusion Dissection Embolisation Rupture Infection
Major reactions of contrast reactions
Allergy
Asthma
Death
What does CTA stand for?
Computed tomography angiogram
Normal vein on USS
Low pressure
Compressible
DVT on USS
Full of thrombus and NOT compressible
What is radionucleotide imaging used for?
Perfusion
Blood loss
Perfusion of transplant kidneys
Blood loss in GI tract
What scan is done to look at PE?
V/Q scan
What does MRA stand for?
Magnetic resonance Angiography