Imaging
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Transcript of Imaging
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IMAGING
Dr Bashir BnYunus
SURGERY RESIDENT
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CXR
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ABDOMINAL X RAY
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INTRAVENOUS UROGRAM(IVU)
Indications• To see the anatomy and physiology of urinary system
• Trauma
• Calculi- renal, ureteric, bladder
• Congenital anomalies- ectopic kidney, horseshoe kidney, renal agenesis
• Infective pathology
• Renal tumour
• Unknown Haematuria
• Renal hypertension
• Bladder pathology- diverticula, fistula
• Vesico ureteric reflux
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Contraindications:
• Hypersensitivity to iodinated CM
• Renal insufficency
• Hepato renal syndrome
• Thyrotoxicosis,
• Pregnancy, (Allow 28 days from childbirth)
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Films • Preliminary film:
Supine, full length AP ofabdomen in inspiration.
Position
To demonstrate bowelpreparation, check exposurefactor, and location ofradiopaque stones or anyradiopaque artifacts.
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Films • 0 MIN :
AP of the renal areas.
After injection of contrast
Aims to show the nephrogram
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• 5-min film: excretion phase AP of renal areas.
To determine if excretion is symmetrical
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• 15 min film:
Supine full length AP
There is usually adequate distension of the pelvicalycealsystems with opaque urine by this time.
Outlines the ureters
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• Release film (full bladder) : coned view of bladder area
• Taken to show the bladder. If this film is satisfactory, the pt is asked to empty the bladder.
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• After micturition film:
• Main aim of films is to
Assess bladder emptying
To demonstrate return of dilated upper
tracts with relief of bladder pressure.
Aid diagnosis of VJ calculi
Dx of bladder tumors
Demonstrate urethral diverticulum.
Residual vol of urine.
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IVU
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RUG
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• INDICATIONS
Urethral stricture.
Urethral tear.
Congenital abnormalities.
Periurethral / prostatic abscess.
Fistula / false passages.
• CONTRAST MEDIUM
Urograffin 60%.
Pre warming the contrast helps to prevent external urethral sphincter spasms
• EQUIPMENT
Tilting radiography table.
Fluroscopy / spot film device.
Foley catheter no 8 / knutsson`s clamp.
• PREPARATION
Patient micturates prior to the procedure
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• TECHNIQUE
Preliminary film – coned supine PA view of bladder base and urethra.
In supine position penile clamp is applied or tip of the catheter is inserted so that the
balloon lies on the fossa navicularis
Balloon is inflated with 1 – 2 ml of water.
Contrast medium is injected under fluoroscopic control.
• FILMING
30* left anterior oblique.
Supine PA.
30* right anterior oblique.
• COMPLICATIONS
Contrast reaction ( due to absorption through bladder mucosa )
UTI
Urethral trauma.
Intravasation of contrast – due to use of excessive pressure in stricture.
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MCUG
CHILDREN
• Voiding difficulties.• Vesico ureteric reflux.• Posterior urethral valve.• Baseline study prior to urinary tract surgery.
ADULTS• Functional disorders of bladder & urethra.• Suspected vesicovaginal / vesicocolic fistula.• Suspected bladder / urethral trauma.• Urethral diverticula
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• COMPICATIONS
Contrast reaction.
Contrast induced cystitis.
UTI.
Catheter trauma.
Bladder perforation – overfilling.
Retention of a foley catheter.
Catheterisation of vagina / ectopic ureter.
• CONTRAINDICATIONS
Acute UTI.
• AFTERCARE
Warned – of rare dysuria , retention.
Reflux - Antibiotcs.
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Posterior urethral valves
Congenital thick folds of mucous membrane located in the posterior urethra
(prostatic + membranous) distal to the verumontanum.
Most common cause of severe obstructive uropathy in children.
Almost exclusively in males.
Now rare for them to present with severe UTI and septicaemia -diagnosis is
generally made in early infancy and antenatal period.
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Types
Type I:
Most common.
Two folds extend anteroinferiorly from caudal aspect of verumontanum often
fusing anteriorly at a lower level.
Type II:
No longer considered a valve.
Hypertrophic band of muscle running from ureteric orifice to verumontanum along
postero lateral urethral wall.
Type III:
Circular diaphragm with a central or eccentric narrow aperture in membranous urethra.
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Fusiform dilatation & elongation of proximal posterior urethrapersisting throught voiding
Transverse/curvilinear filling defect in posterior urethra
MCU – Lateral view.
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Grading of VUR
• Grade 1 : reflux limited to ureter
• Grade 2 : reflux into renal pelvis
• Grade 3 : mild dilatation of ureter
and pelvicalyceal system.
• Grade 4 : tortuous ureter with
moderate dilatation, blunting of
fornicies but preserved papillary
impressions.
• Grade 5 : tortuous ureter with
severe dilatation of ureter and
pelvicalyceal system, loss of
fornicies and papillary impressions
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Barium swallow
Mass in mid oesophagus-shouldering and irregular shadow
D/D-carcinoma; mass out oesophagus e.g.mediastinal mass
Confirmation-oesophagoscopyand biopsy and rule out bronchus invasion
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RAT TAIL APPEARANCE
Hugely dilated oesophagus with narrow lower end rat tail appearance)
D/D-Achalasia cardia, carcinoma lower end oesophagus , stricture
Confirmation-oesophagoscopy and manometry
Biopsy and follow up
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Barium meal
Hugely dilated oesophagus with narrow lower end rat tail appearance)
D/D-Achalasia cardia, carcinoma lower end oesophagus , stricture
Confirmation-oesophagoscopy and manometry
Biopsy and follow up
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CT SCAN
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QUESTIONS