Vas week 5: Arterial UE & LE duplex imaging knowledge check

What adjustment would be appropriate to detect low velocity arterial flow (<30 cm/sec)?

increase color gain

Where are collateral vessels observed by duplex imaging in the case of an occlusion?

proximal or distal to the occlusion

Upper extremity arterial plaque is most commonly found in which arteries?

subclavian & axillary

The false lumen of an arterial dissection can progress into which of the following conditions?

Pseudoaneurysm

The minimum increase in upper extremity velocity ratio from one segment to the next is __________ for a significant stenosis.

2.0

The typical shape of an upper extremity aneurysm is:

Fusiform

Intralumenal thrombus within an aneurysm can be a source of __________.

Emboli

The typical flow pattern in the neck of a pseudoaneurysm is:

To and fro

The __________ artery is most likely to be involved in an upper extremity arterial dissection.

Subclavian

A staccato waveform pattern indicates:

Distal arterial occlusion

When stenosis is >70%, expect the velocities to at least __________ compared to the proximal arterial segment.

triple

When evaluating for popliteal artery entrapment, measure the PSV of the distal popliteal artery at the level of the:

Gastrocnemius muscle head

What percentage of patients with femoral aneurysms also have popliteal aneurysms?

3%

One critical complication of popliteal aneurysm is: 

Emboli

Which peripheral artery most commonly becomes aneurysmal?

popliteal

__________ is a temporary constriction of the arteries that may cause significant discomfort to the patient and may be a sign of more serious underlying disease.

Vasospasm

Collaterals often enter/exit arteries at what angle?

90 degrees

A 50% luminal reduction corresponds to __________% area reduction.

75

An abnormal monophasic waveform in the common femoral artery accompanied by a PSV of __________ is likely indicative of iliac artery __________.

<45 cm/sec, occlusion

Normal peak systolic velocity or PSV of the distal superficial femoral artery is:

94 + 14 cm/sec