Evaluation of microcirculation in Buerger's disease using 201thallium/99mtechnetium macroaggregated albumin...

Area of Science:

• Vascular Medicine
• Nuclear Imaging
• Medical Diagnostics

Background:

• Buerger's disease (thromboangiitis obliterans) is a rare inflammatory condition affecting small and medium-sized blood vessels, primarily in the limbs.
• Microvascular dysfunction is a suspected but not fully understood component of Buerger's disease pathophysiology.
• Differentiating Buerger's disease from other occlusive arterial diseases like atherosclerosis obliterans (ASO) is clinically important.

Purpose of the Study:

• To evaluate and compare microvascular disturbance in patients with Buerger's disease versus ASO.
• To investigate the utility of dual-isotope scintigraphy in assessing peripheral microcirculation in these conditions.

Main Methods:

• A comparative study involving 10 patients with Buerger's disease and 7 control patients with ASO.
• Intra-arterial injection of 201thallium (201Tl) and 99mtechnetium macroaggregated albumin (99mTc-MAA) after brief exercise.
• Calculation of 201Tl/99mTc-MAA uptake ratios from planar images of the feet and lower extremities.

Main Results:

• Significantly lower 201Tl/99mTc-MAA uptake ratios were observed in the toes of Buerger's disease patients compared to ASO patients.
• No significant differences in uptake ratios were found in the lower limbs and feet between the two groups.
• The results indicate a localized microvascular disturbance in the toes specific to Buerger's disease.

Conclusions:

• The study suggests that impaired microvascular regulation, particularly in the toes, is a characteristic feature of Buerger's disease.
• Dual-isotope scintigraphy with 201Tl and 99mTc-MAA can help differentiate Buerger's disease from ASO by revealing localized microvascular abnormalities.
• These findings contribute to understanding the pathophysiology of Buerger's disease and may aid in diagnosis.