Penis Flashcards
How do you perform a penile doppler US?
US of the cavernosal (deep penile) artery after intracavernosal injection of prostaglandin E1
What is the normal peak cavernosal artery systolic velocity?
> 35 cm/sec during erection
What is the peak cavernosal artery systolic velocity that usually is required for an erection to occur?
If less than this, what is this a sign of?
> 25 cm/sec usually required for erection
If < 25 cm/sec, its a sign of severe arterial disease.
What is normal peak cavernosal artery end-diastolic velocity?
< 5 cm/sec during erection
At what peak cavernosal artery end-diastolic velocity are you concerned for venous leak (penile veno-occlusive disease)?
> 5 cm/sec
Imaging of choice for penile fracture?
Penile MRI (determine if tunica albuginea is intact)
- Imaging usually unnecessary if clinically suspicious
What imaging views are REQUIRED to adequately assess a RUG?
anterior-posterior and oblique
Indications for a RUG:
Urethral trauma (blood at meatus)
Stricture
Evaluation of urethroplasty
What imaging modality offers the most accurate measurement for anterior urethral strictures and spongiofibrosis?
US
What is the formula for pediatric bladder capacity in mL?
capacity in mL = (age + 2) x 30
What are indications for doing a pediatric voiding cystourethrogram?
pediatric febrile UTI prenatal hydronephrosis voiding dysfunction posterior urethral valves VUR bladder neck contracture
Imaging of choice for a urethral diverticulum?
Pelvic MRI
- RUG, VCUG, or US can detect too
What are the 3 D’s of urethral diverticulum?
Dysuria
Dyspareunia
Dribbling
