Penile Non-imaging And Imaging Flashcards
T/F
A limitation of penile ultrasound is the sensitivity to injectable medication and/or anticoagulant ion therapy that may prevent use of injection components
True
With the non-imaging technique we need to obtain velocities bilaterally of which three arteries
*hint: lower extremity arteries
CFA, PTA, DPA
With non-imaging, after obtaining velocities of CFA, PTA, DPA; the next step is to?
Calculate an ABI with appropriate cuffs placed on upper arms and ankles
What is the average cuff size for penile pressures
2.5 x 12.5 cm
For penile Doppler, what is the appropriate probe placement?
Lateral or ventral
According to the vasculogenic impotence stats, what is the penile/brachial index range for:
Normal
Marginal
Abnormal
Normal: >/= 0.75
Marginal: 0.65-0.74
Abnormal: < 0.65
When performing the penile plethysmographic test, what is obtained
We obtain a waveform only, meaning we cannot hear the pressures.
Similar to finger and toe PPG tracings.
If the penile pressures are reduced, what is most suggestive?
Suggests a more proximal arterial disease (ex: aorta-iliac, internal iliac)
When using imaging for penile pressures, what is the recommended probe
Multi frequency 7-10 MHz linear array transducer
Do we need a consent in order to proceed with the imaging technique of Penile pressure
Yes, we need an informed consent
Prior to injection of medication, what measurements must be obtained?
Same measurements are then re-checked 1-2 minutes AFTER injection
Cavernous (cavernosal) arteries are measured in AP diameter as well as the PSV and EDV
What is the purpose of the medication that is injected
Injection is done at lateral aspect, prox to shaft of penis to induce erection
What other velocity is obtained after the injection?
Dorsal vein flow velocity
What is priapism
Sustained erection
It is VERY IMPORTANT to contact urologist immediately if…
If erection is maintained for up to 3 ours in order to reverse the priapism
With the imaging technique of penile pressures, results are normal when the DIAMETER of cavernous arteries ______ post-injection, with PRE-injection flow to be ____ resistant, and POST-injection flow to be ____ resistant
The diameter should INCREASE
pre-injection has HIGHER resistance
Post-injection has LOWER resistance
With imaging technique of penile pressures, the PSV measurements should _____, with a normal range approximately ___cm/sec or higher
PSV measurements should INCREASE with a range of 30cm/sec or higher (EDV also higher)
Should the dorsal vein velocities increase? What does an increase suggest?
should NOT increase, this would suggest a venous leak
- *normal = < 3cm/sec
- *abnormal = > 20cm/sec
