click below
click below
Normal Size Small Size show me how
Retrograde Urography
Question | Answer |
---|---|
Routine images for Retrograde Urography procedures | AP Scout, AP Pyelogram, AP Ureterogram |
Center point for AP Scout | L-3 |
Possible body (table) position for Pyelogram | Head of table lowered 10-15 deg (to prevent contrast from escaping into ureters) |
Sometimes done to ensure complete filling of pelvicaliceal system | Pressure maintained on syringe during pyelographic exposure |
Possible body (table) position for Ureterogram | Head of table elevated 35 to 40 deg (to demonstrate tortuosity of ureters & mobility of kidney) |
mL contrast to fill normal renal pelvis | 3 to 5 ml |
Pt respiration for Pyelogram, and when performed | Suspend on Expiration, after contrast injected thru catheters to fill renal pelves and calyces |
Pt respiration for Ureterogram | Deep breath in, then suspend on full Expiration |
This is performed during breathing procedure and exposure of Ureterogram | Catheters slowly withdrawn to lower ends of ureters as contrast is injected into canals |
Possible additional projections | RPO or LPO (AP Oblique), Lateral (on affected side), Ventral or Dorsal Decub Lateral |
Reason for Lateral projection | To show anterior displacement of a kidney or ureter & to delineate (outline) a perinephric abscess |
Reason for Decub Lateral projection | To show ureteropelvic region in pt w/ hydronephrosis |
Body position for Retrograde Urography | Modified lithotomy position, lower back must be in contact w/ table |
Retrograde means... | going against the natural flow |
Indications for Retrograde Urography | Eval of collecting system (in case of renal insufficiency) & for pt. w/ contrast allergy |
Chance of allergic reaction | Less than other procedures bc contrast is not introduced to circulatory system |