Normal toe brachial index (TBI):
> 0.6
Normal finger brachial index (FBI):
> 0.8
How do you perform a cold stress test?
- Perform at rest
- Soak in ice water for 3min
- Obtain pressures & waveform
How do you perform a digital pressure test?
- Bilateral brachial pressures
- Use PPG to get digital pressures
__________ & __________ are useful in patient with cold sensitivity & medial calcinosis
- Digital pressure
- PPG
_________ waveform has a flattened, dampened pulse
Severe
_________ waveform has a flattened peak, slow upstroke & downslope
Moderate
________ waveform has a sharp peak, absent dicrotic notch. Downslope bowed from baseline
Mild
________ waveform has a sharp peak, dicrotic notch
Normal
How is plethysmography waveform contour described?
- Normal
- Mild
*Moderate - Severe
With plethysmography changes in waveform contour between levels mean?
Disease
With plethysmography the cuff is inflated to?
40-65 mmHg
_________ uses small sensors on digit, which sends infrared light & the capillary pulsations reflect the light
Photoplethysmography
PPG stands for?
Photoplethysmography
When there’s a volume increase in systole, sensor detects _________ in volume & demonstrates a peak on ________
- Increase
- PVR
What does PVR stand for?
Pulse volume recording
________ uses pneumatic cuffs (BP cuffs with special sensor) to detect changes in volume
Plethysmography
What are the types of plethysmography?
- Pneumo
- True
- Air
Limitations of plethysmography?
- Not vessel specific
- Can underestimate disease
Capabilities of plethysmography?
- Usually performed with segmental pressure study
- Evaluates functional aspect of disease
