Photo-Plethysomgraphy

Question 1

PPG capabilities

5

Answer 1

mainly used on digits and penile vessels

assess entire limb flow /assess collateralization

considered an end point detector for arterial disease
detects the presence /absence of arterial disease and

defines its functional aspects

is not affected by calcified vessels

Question 2

Limitations

Answer 2

pt tremors

venous influence not entirely eliminated

Question 3

major descriptions of PPG waveforms :

NORMAL

Answer 3

rapid upslope
sharp systolic peak
reflected wave

Question 4

major descriptions of PPG waveforms :

MILD ABNORMAL

Answer 4

sharp peak
absent reflected wave
downslope is bowed AWAY from the baseline

Question 5

major descriptions of PPG waveforms :

MODERATELY ABNORMAL

Answer 5

flattened systolic peak
upslope and downslope are more delayed
reflected wave is absent

Question 6

major descriptions of PPG waveforms :

SEVERELY ABNORMAL

Answer 6

Low amplitude

or absent

Question 7

Abnormal PPG APG wave forms always reflect hemodynamically significant disease _____ to level of tracing

Answer 7

proximal

Question 8

severity is generally

Answer 8

underestimated

Question 9

reduced amplitude with no changes in the contour is likely to reflect _________ disease unless it is _________.

Answer 9

insignificant

unilateral

Question 10

are you going to look at APG PPG waveforms

Answer 10

yes

Question 11

fair waveform quality may accompany abnormal segmental pressures because ________ can underestimate the significance of obstruction based on _______.

Answer 11

collaterals

plethysmography