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Angiology
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Photoplethysmographic Documentation of Improved Microcirculation After Pentoxifylline Therapy

Thomas Roeren

From the Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania

Robert F. LeVeen

From the Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania, Medical Research Service and Clinical investigator, VA Research Career Development Program, Veterans Administration Hospital, Philadelphia, Pennsylvania

Loree Nugent

Vascular Laboratory, Veterans Administration Hospital, Philadelphia, Pennsylvania

Pentoxifylline is the prototype of a new class of drugs that improve periph eral blood flow mainly by increasing red blood cell flexibility. Few studies have been performed to objectively evaluate the effect of the drug in a routine clinical setting.

In 11 patients with intermittent claudication, photoplethysmography was used to monitor the effect of pentoxifylline on the microcirculation in the lower extremities. Values obtained improved significantly (p < .0001) under therapy. Concomitant measurements of ankle-brachial indices showed no significant changes despite clinical improvement. Diabetic patients in this study seemed to benefit from treatment with pentoxifylline at least as much as nondiabetic pa tients.

Photoplethysmography proved to be a very efficient and inexpensive method of studying the effects of pentoxifylline. Ankle-brachial indices are not a suit able method of detecting flow changes attributable to the mechanism of action of this drug.

Angiology, Vol. 39, No. 11, 929-933 (1988)
DOI: 10.1177/000331978803901101
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