Flashcards in L62 Deck (30)
Uses of XR for kidney
Calcification - UT stones
What is IV urography
XR after IV injection of contrast -> circulates to kidneys -> filtered + excreted
No longer used b/c CT
What are your 3 major concerns with giving contrast
Risk of death
How do you do antegrade pyelography?
Percutaneous needle into kidney - inject contrast - XRs
See collecting system only
Pro - do drainage
How do you do retrograde pyelography?
Inject contrast retrograde from the bladder -> ureters
Less invasive than anterograde
3 reasons you do retrograde pyelography?
What do you see with US?
Uses of US
Acute + chronic renal failure
Masses + cysts (stone -> hydronephrosis)
Can't see normal collecting system - see dilated collecting duct only
Not greater for ureter obstruction
Bad if obese, bowel gas, bone
See a lot // versatile
Contrast: allergy // nephrotox
Dx renal masses
Tissue characterization: fat, blood products, fluid
High contrast resolution/versatile
$ / availability
CIs: pacemakers, metal (jts), renal failure
How do you do angiography? What do you see?
Inject contrast into arteries
See arteries, veins, renal parenchyma and collecting system
NOT 1st LINE
Dx renal art stenosis + vasculitis
Treat arterial steonsis (since you already have arterial access)
- Embolize bleeding vessels
Contrast: allergy + nephrotox
What is nuclear scintigraphy?
+ radioactive isotope to molecule metabolized and excreted by kidney
L flank pain sharp + intermittent, radiates to groin, gross hematuria w/o fever chills
LOW DOSE CT > XR b/c get all stones, even those not radio-opaque
What is the cut off for allowing a stone to pass on own?
But location influences therapy - pts of anatomic narrowing
Scan for stones in kids + pregnant women
L flank pain + fever, h/o drug use + HIV
Treat: percutaneous drainage + antibiotics
US or CT
What is a UTI of the upper vs lower urinary tract
Upper UTI: pyelonephritis
Lower UTI: cystitis
Do you image UTI?
No - clinical dx
Image if not responding to treatment
What is emphysematous pyelonephritis?
Infection due to bug that causes gas forming infection
Best imaging for dx and staging
What is the imaging work up for hematuria?
CYTOSCOPY for all - CT urogram