Penile non imaging and imaging

Question 1

Helps determine whether impotence is related to peripheral vascular insufficiency

Answer 1

Capabilities of Penile non imaging and imaging

Question 2

Sensitivity to injectable medication; and/ or anticoagulation therapy may prevent use of the injection component

Answer 2

Limitations

Question 3

What position is the patient in to perform this exam?

Answer 3

Supine

Question 4

Doppler previosuly described (CW)

Plethysmographic tenchinques

Duplex scanning principles

Answer 4

Physical principles

Question 5

Doppler velocity signals obtained bilat (CFA, PTA, PDA)

Appropriate BP cuffs placed on upper arms and ankles

Calculate ABI

Answer 5

Techniques for non imgaing

Question 6

Poor arterial inflow to LE due to proximal obstruction may affect

Answer 6

Penile arterial inflow

Question 7

What is obtained with Doppler of PPG as the “end point detector”

Answer 7

Penile pressures (Techniques)

Question 8

Where do you place the probe

Answer 8

Lateral or ventral

Question 9

What size cuff do you use

Answer 9

2.5 x 12.5 cm

Question 10

Penile plethysmographic wave forms obtained

Answer 10

Techniques

Question 11

Penile/Brachial index

Normal =
Marginal =
Abnormal =

Answer 11

> .75

.65 - .74

< .65

Question 12

Reduced presssure highly suggestive of

Answer 12

More proximal arterial disease (aorta-iliacs, internal iliacs)

Question 13

Abnormal plethysmographic tracings show

Answer 13

marked reduction in amplitude

Question 14

What probe is used?

Answer 14

7 - 10 MHz (linear array transducer)

Question 15

Prior to medication injection what is measured:

Answer 15

Cavernous artery transverse AP measurement

PSV/ED obtained

Question 16

Where is the specific medication injected into the penis ?

Answer 16

Lateral aspect, Proximal shaft of the penis to induce erection

Question 17

When are measurements taken after the injection?

Answer 17

1 - 2 minutes post injection

Question 18

What vein is measures?

Answer 18

Dorsal veins flow velocity is measured?

Question 19

How long should the erection last up to?

Answer 19

3 hours no more than 3 hours

Question 20

Diameter of cavernous artery should increase post injection
Doppler flow is higher resistant pre injection; lower resistant post injection

Answer 20

Normal

Question 21

PSV measurements should increase

Answer 21

Normal

Question 22

What is normal range for PSV

Answer 22

30 cm/sec or higher
(anything less is abnormal)

Question 23

Dorsal vein velocities should not increase

Answer 23

Normal

Question 24

If there is in increase the dorsal vein could suggest

Answer 24

venous leak

Question 25

Normal measurements of dorsal vein is

Answer 25

< 3 cm/sec

Question 26

Abnormal measurements of dorsal vein is

Answer 26

> 20 cm/sec