Module 17 Week 1 Flashcards
(221 cards)
(Diagnostic Imaging of the Urinary System)
Why is a plain radiograph limited for imaging the urniary tract?
- Soft tissue & fluid same opacity
- Cannot distinguish between urinary fluid or renal parenchyma
- kidney and bladder may not be clearly visible esp R kidney
What are radiographic contrast studies used for?
Performed when ultrasound is unavailable
Helps assess specific structures
What structures can be assessed with contrast studies?
Intrapelvic structures
Urethral rupture
Bladder rupture
What are the types of contrast media?
Negative contrast: Air, CO₂
Positive contrast: Iodine-based contrast medium
What must be done before a contrast study?
Take plain radiographic images
Perform an enema (if remembered)
What is Intravenous Urography (IVU)?
A contrast study to visualise the kidneys and ureters
Uses an iodine-based contrast medium
How is contrast administered in IVU?
Injected intravenously into the cephalic vein
What does IVU demonstrate?
Highlights the kidneys and ureters on radiographs
What kind of contrast does a positive contrast cystogram use?
Iodine contrast medium
How do you perform a positive contrast cystogram and what does it allow you to assess?
Catheter into the bladder allowing you to assess bladder position and if there are any ruptures.
What contrast does a negative contrast cystogram use?
Air/Co2
What does a negative contrast cystogram allow you to assess?
bladder position and wall thickness
What contrast types does a double contrast cystogram use?
1-5ml contrast then air
What does a double contrast cystogram assess?
Position, luminal content and wall thickness
Who is a retrograde urethrogram performed on?
Males only
Where is the catheter placed in a retrograde urethrogram?
Distal urethra
hat structures does a retrograde urethrogram demonstrate?
The urethra
The prostate (if abnormal)
How is a retrograde urethrogram performed?
A catheter is placed in the distal urethra
Contrast medium is injected
X-rays are taken to visualise the urethra
Who is a retrograde vaginourethrogram performed on?
females only
Where is the catheter places in a retrograde vaginourethrogram
Through the vulva
What structures does a retrograde vaginourethrogram demonstrate
vestibule
vagina
urethra
How is a retrograde vaginourethrogram performed?
A catheter is inserted through the vulva
contrast medium is injected
x-rays are taken to visualise
Where should you fan the US probe when doing an renal US to view long axis?
Fanny from laterally to medially to see the entire organ
Where should you fan the US probe when doing an renal US to view short axis?
Fan through to ensure you scan the entire organ