ABI
Digital Evaluations
Examination Procedures
Doppler Signals/Systolic Pressures
Miscellanous
100

What is a normal ABI?

1.0

100

What is a normal TBI?

Greater than or equal to 0.8

100

Where should cuffs be placed for ABIs?

Upper arms & ankles

100

What shape is a normal doppler waveform?

Biphasic or triphasic

100

PAOD reduces flow energy where in relation to the lesion?

Distal

200

How is an Ankle-Brachial Index calculated?

By dividing the highest systolic ankle pressure by the higher of the two brachial systolic pressures

200

Digital waveforms are obtained with ____ or _____ ?

PVR or PPG (Photoplethysmography)

200

What should the width of a blood pressure cuff be?

20% wider than the diameter of underlying limb.

200

In segmental limb pressure exams, systolic pressures usually increase as blood flows where?

Distally in the lower extremity.

200

Which doppler technique is most commonly used to assess PAOD?

Continuous Wave Doppler

300

Excessively high ABI values typically correspond to..?

Calcified arteries

300

When determining systolic pressure, cuffs are inflated until...?

The waveform disappears
300

When prepping patient, which type of relevant patient history would be important? (Name at least 2)

Smoking history, exercise activity, & family history of cardiac/vascular disorders.

300

Pressures are typically repeated how often until they return to baseline?

Every 1 to 2 minutes.

300

Name an AKA for Plethysmography.

Air plethysmography, pulse volume recording (PVR) or volume pulse recording (VPR)

400

Lower ABI values correspond to..?

Worsening PAOD

400

TBI is useful when...?

The ankle vessels are incompressible.

400

Why is it important to let the patient rest for 10 to 15 minutes before taking systolic pressures?

Ensures true resting levels of blood flow.

400

Systolic pressures are __________ if the arteries are calcified and uncompressible.

invalid

400

What can be used to determine the site of PAOD?

Segmental limb pressures

500

What is the overall purpose of an Ankle-Brachial Index?

To diagnose the overall severity of PAOD

500

A toe pressure of ____ indicates adequate pressure for healing.

50 mmHg

500

Where should cuffs be placed for multilevel lower extremity pressures?

Upper arm, thigh, calf, & ankles.

500

A pressure drop of ­­­­______ indicates the presence of a proximal obstruction.

> 30 mmHg

500

Recovery time suggests whether PAOD is single or multilevel. An ABI that returns to preexercise levels within 5 minutes is associated with what?

Single-level disease

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