Chapter 7

Question 1

what does penile imaging help determine?

Answer 1

whether impotence is related to peripheral vascular insufficiency

Question 2

what are some limitations of penile imaging?

Answer 2

high level of anxiety or antagonism
duplex needed for velocities and anatomic conditions
sensitivity to injectable medication and or anticoagulation therapy may prevent use of the injection component

Question 3

how should the patient be positioned for penile imaging?

Answer 3

supine, with appropriate draping done to maintain privacy

Question 4

where should doppler velocity signals be obtained?

Answer 4

CFA, PTA, DPA

Question 5

where should BP cuffs be placed?

Answer 5

upper arms and ankles

calculate ABI

Question 6

what may affect penile arterial inflow?

Answer 6

poor arterial inflow to LE due to proximal obstruction

Question 7

what cuff size should be used for penile?

Answer 7

2.5 x 12.5cm

lateral or ventral

Question 8

penile pressure obtained with what?

Answer 8

doppler or PPG

as end point detector

Question 9

what is the normal penile/ brachial index?

Answer 9

> 0.75

Question 10

what is marginal penile/brachial index?

Answer 10

0.65-0.74

Question 11

what is abnormal penile/brachial index?

Answer 11

<0.65

Question 12

what index is consistent with vasculogenic impotence?

Answer 12

<0.65

Question 13

which probe freq should be used for penile imaging?

Answer 13

7 or 10 MHz

Question 14

prior to injection what arteries are measured?

Answer 14

cavernous arteries are measured in A/P diameter in trans, PSV and EDV obtained

Question 15

T/F should a consent be obtained with penile imaging?

Answer 15

true

Question 16

where is the medication injected?

Answer 16

lateral aspect proximal shaft of the penis

Question 17

how long after you retake the measurements?

Answer 17

1-2min

Question 18

what other vessel is measured?

Answer 18

dorsal veins

Question 19

T/F is rigid erection last over 6 hours patient must call their doctor / urologist

Answer 19

false

3 hours

Question 20

what is normal interpretation of penile imaging?

Answer 20

diameter of cavernous arteries should increase post injection

Question 21

what are the normal ranges of PSV when they increase?

Answer 21

PSV approx. 30cm/s or higher. anything less often considered abnormal

Question 22

T/F dorsal veins should increase

Answer 22

false

Question 23

what does an increase in dorsal veins mean?

Answer 23

an increase could suggest a venous leak

Question 24

what is normal velocity for dorsal veins?

Answer 24

<3cm/s

Question 25

what is abnormal velocity for dorsal veins?

Answer 25

> 20cm/s