Case Study: Claudication
The color bar can be used to quickly identify
different regions of tissue oxygenation that then can be quantified
by using the HyperVu software. HT-oxy levels are related to color
changes (low to high, yellow to purple) – HT-deoxy levels
are related to brightness (low to high, pale to brilliant).
HT study of a mild/moderate claudicator with pain while functioning
as a facilities maintenance man during his work day. Angiography
showed evidence of L common femoral artery occlusion. Long segment
occlusion precluded successful angioplasty/stent at the Lahey
Clinic. The study showed reconstitution before the SFA/profunda
bifurcation with good distal runoff. The top row demonstrates
changes due to vascular compromise seen at baseline, including
an "island of ischemia" in the center of the forefoot.
Before we started the study the subject pointed to this region
as the place that had dysesthesias long before claudication started.
The bottom row shows dramatic changes after brief exercise (until
pain occurred while he was carrying a box and walking briskly
for 1 minute, which is typical of his work requirements).
- Study displays a good example of early skin changes associated
with islands of ischemia
- Post exercise study demonstrates changes associated with vascular
(common femoral) occlusion
- Post exercise study demonstrates changes associated with minor
(50% common femoral) obstruction
- Study demonstrates changes associated with superficial ulceration
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