Penile doppler a review

Penile doppler – A practical approach

35 yr male patient with h/o
depression
And Erectile dysfunction.
Grey scale / color doppler
assessment was done
to assess vasogenic / other
etiology of the erectile
dysfunction.

 Dr Ritesh Mahajan
Free lance radiology
Approach towards basic imaging

PENILE ANATOMY………………………..

Penile vascular anatomy……….
 Internal pedundle artery
through bulbar artery supplies  Venous drainage is through
base of the penis . Penile efferent venules – emisssary
artery divides into two veins - dorsal veins . Base of
cavernosal arteries and the penis through crural
continues as dorsal artery . veins drains into the
There are helicine arteries that periprostatic venous plexus
run through the substance of in to the internal iliac veins .
the corpora .
 The glans region has it’s
 Cavernosal arteries are drainage into the external
paramedian in location. iliac venous system.
 Cavernosal and dorsal
 Penile venous system is
arteries show more
variability than venous more constant than the
drainage of the penis . arterial anatomy.

Basis of normal erection……….
 Flaccid state : Intracavernosal arterial
 After neural impulse resistance is high . Cavernosal arterial flow
has low systolic, dampened diastolic flow .
 Vasodilatation  After giving vasoactive agent : Increased
 Increased blood supply dilatation of the cavernosal arterial tree is
there with increased systolic and diastolic
 Increased intracavernosal component of the flow and velocities.
pressure  There is sinusoidal expansion of the arterial
 Efferent venous channel are flow with obstructed venous egress
obstructed by taut tunica  Further rise in cavernosal pressure leads to
systolic dampening and loss of diastolic
albuginea. component .
 On doppler study  With rigid erection – there is near total loss
predictable spectral of diastolic flow and at times reversal .
waveform corrborates with  As far as venous flow is concerned : flaccid
changes in the intra state has sluggish flow. With vasoactive
cavernosal pressure . agent there is increase in the dorsal venous
flow and with rigid erection the venous
flow can stop . Retrograde venous flow is
also appreciated in normal individuals.

Basis of normal erection……
Phases of erection ………….  After neural impulse there is
rise in the intracavernosal
presssure –There is cavernosal
 Flaccid arterial dilatation and rise in
the systolic and diastolic flow
 Latent . The dorsal venous flow also
rises initially . With rise in the
 Tumescent cavernosal pressure –
distended sinusoids abut the
 Rigid tunica albuginea and this
 Detumescence leads to cessation of the
venous egress and leads to
rigid erection. With rigid
erection ,this diastolic
component of the cavernosal
arterial flow is lost and at
times reverses also .

Penile imaging ………………………..
ERECTILE DYSFUNCTION
ETIOLOGY

 Psychogenic
 Endocrine
 Pharmacological
 Neurological
 Vascular
Organic etiology – Vasogenic
etiology is important and
penile Doppler assessment
can be of use to ascertain
the same .

Penile imaging …………………………….

Diagnostic work up for erectile
dysfunction Penile anatomy
 Medical / drug history .  Three distensible corpora
chambers -
 Routine / endocrine blood 1. Corpora spongiosum enveloping
analysis. the urethera. This does not play
significant role in erection.
 Non invasive testing 2. Corpora cavernosa – dorsal in
position –paired .
 Brachial – penile indices  Mid line septum separates the
 Nocturnal penile two corpora cavernosa . Thick
fascia (tunica albugenia) encircles
tumescence. the corpora cavernosa and bucks
fascia covers corpora cavernosa
and spongiosa .

Basic methodology of penile doppler

 Linear transducer parallel  Grey scale assessment
to skin surface is used . involves assessment of
Both ventral and dorsal echogenic tunica
transducer position albuginea. Midlevel echoes
approaches can be used. of the corpora cavernosa .
 Slow flow detection Assess mid line septum .
settings are to be used.  Cavernosal arteries are
 Longitudinal and assessed by echogenic
parasagitttal image walls and with paramedian
acquisition is to be done . location.

Brief about doppler examination…….

 Complete discussion of  Velocity measurements are
the examination with the done along the base of the penis
. Angle of assessment <60
patient is to be done . degree.
 Assessment of the privacy  PSV, EDV, RI , PI is done for
cavernosal arteries on either side
is to be done . .
 Quiet examination setting  Look for cavernosal artery
stenosis , occlusion, retrograde
is necessary . arterial flow , dampened spectral
flow.
 Pharmacological agents :
 Cavernosal artery dilatation
papaverine, phentolamine, <75% of the base arterial
prostaglandin E diametre is indirect e/o
vasogenic etiology of erectile
 Eye technique : visual dysfunction.
inspection is important .

Grey scale sonography…..
Grey scale sonography
Good for assessment of

 Peyronie’s disease.
 Penile trauma
 Penile neoplasm

venous insufficiency………

Variations ………………….. Venous insufficiency
 Most common form of
 Absence of the penile impotence
artery : +_ cause of the  EDV > 5cm/sec suggests venous
impotence . incompetence .
 PSV > 30 cm/sec helps to rule
 Corpora cavernosa - out arterial etiology and search
corpora spongiosum for venous etiology has to be
sorted out .
collaterals , dorsal venous  EDV > 2 to 6cm/sec supports
and corpora collaterals venous insufficiency .
should also be assessed.  Instead of measuring EDV : RI (
<.8) , PI (<4) also support
venous insufficiency as etiology
of erectile dysfunction.

Grey scale and basic
doppler assessment
BASIC COLOR DOPPLER ASSESMENT –
GREY SCALE DONE AT BASE OF THE PENIS

 PLAQUE / CALCIFICATION.  Imaging especially for
doppler is done along the
 MID LEVEL ECHOES OF
base of the penis .
CORPORA CAVERNOSA
 The sequence of the
 TUNICA ALBUGENIA imaging is as following :
/BUCKS FASCIA 1. Flaccid state
2. Papaverine injection
3. Post injection imaging is
done at 5 , 10,15,20,25
minutes .

PARAMETRES TO BE ASSESED IN
THE FLACCID STATE
 Dorsal vein diameter
 Cavernosal artery ( both left
and left artery )
1. Diametre
2. PSV
3. EDV
4. PI
5. Dorsal cavernosal collaterals
6. Cavernosal spongiosal collaterals

PARAMETRES TO BE ASSESED POST
PAPAVERINE INJECTION

 Post papaverine
 Dorsal vein diameter
injection
 Cavernosal artery ( both left
 5minutes
 10minutes and left artery )
 15 minutes 1. Diametre
 20 minutes 2. PSV
 25 minutes 3. EDV
4. PI

INTERPRETATION
 PSV Rt cavernosal artery
 PSV left cavernosal artery
 Difference between the PSV on either side
( should not be more than 10cm/sec).
 Diastolic flow loss
 DIASTOLIC REVERSAL
 Persistence of the dorsal venous flow

NORMAL VALUES

 Corpora cavernosal artery PSV values :
1. PSV : 35 cm/sec : Normal
2. PSV : 25-35 cm/sec : indeterminate
3. PSV : <25 cm/sec : Abnormal
 Venoocclusive incompetence
1. No diastolic flow loss
2. No diastolic flow reversal
3. EDV ( Cavernosal artery): 2 to 6 cm/sec
4. RI ( Cavernosal artery) < .8
5. PI (cavernosal artery) <4

PRECAUTIONS

 Inject papaverine only once
 Keep region of injection pressed
 Use insulin syringe
 Alcohol swab to clean
 Keep watch for priapism ( urologist
/anesthetist support ) .

Flaccid state
Flaccid state assessment of the
Dorsal vein diametre dorsal vein

Flaccid state
Flacid state assesment of the corpora / Cavernosal artery on either
bucks fascia / intercavernosal connection side diametre assesment
Sagittal / axial images

Flaccid state – cavernosal
artery Left cavernosal artery flaccid state –
appreciate relatively high resistance
Rt cavernosal artery flaccid state – appreciate
relatively high resistance flow no diastolic flow no diastolic component
component

Ancilliary findings

No e/o dorsal cavernosal collaterals . No
e/o cavernosal spongiosal collaterals

Injection of the papaverine injection in the
left corpora cavernosa
INSULIN SYRINGE
USED
INJECTION DONE IN
LEFT CORPORA
CAVERNOSA
GUIDED INJECTION
DONE AVOIDING THE
LEFT SIDE
CAVERNOSAL ARTERY
ANESTHETIST WAS
INVOLVED IN THE
INTERVENTION .
ALCOHOL SWAB WAS
USED .
PRECAUTIONS WERE
TAKEN TO AVOID SPILL.

5 MINUTES AFTER INJECTION

CAVERNOSAL ARTERIES ON EITHER APPRECIATED THE SURGE IN SYSTOLIC
SIDE AFTER PAPAVERINE INJECTION FLOW AND DIASTLOLIC FLOW


DORSAL VEIN FLOW AFTER DORSAL VEIN DIAMETRE
FIVE MINUTES AFTER 5 MINUTES


CAVERNOSAL ARTERIES ON EITHER SIDE 10 APPRECIATED THE SURGE IN SYSTOLIC
minutes AFTER PAPAVERINE INJECTION FLOW AND DIASTLOLIC FLOW


TEN MINUTES AFTER 10 MINUTES


fifteen MINUTES AFTER 15 MINUTES

CAVERNOSAL ARTERIES ON EITHER SIDE AFTER 15
APPRECIATE THE SURGE IN SYSTOLIC
minutes of PAPAVERINE INJECTION FLOW AND DIASTLOLIC FLOW


twenty MINUTES AFTER 20 MINUTES


CAVERNOSAL ARTERIES ON EITHER SIDE 20 APPRECIATED THE SURGE IN SYSTOLIC
minutes AFTER PAPAVERINE INJECTION FLOW AND DIASTLOLIC FLOW


twenty five MINUTES AFTER 25 MINUTES

CAVERNOSAL ARTERIES ON EITHER SIDE 5
minutes AFTER PAPAVERINE INJECTION Diastolic loss


thirty MINUTES AFTER 30 MINUTES


CAVERNOSAL ARTERIES ON EITHER SIDE thirty
minutes AFTER PAPAVERINE INJECTION Diastolic loss

Penile doppler a review

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