Study of Dynamic Microcirculatory Problems in 'Blackfoot Disease' - Emphasizing Its Differences from Arteriosclerosis

Area of Science:

• Physiology
• Vascular Biology
• Medical Technology

Background:

• The cutaneous microcirculation comprises thermoregulatory shunt vessels and nutritive capillaries.
• Laser Doppler flowmetry primarily measures flux in non-nutritive shunt vessels.
• Computerized videophotometric capillaroscopy offers a sensitive assessment of nutritive skin capillaries.

Purpose of the Study:

• To evaluate the sensitivity and clinical utility of laser Doppler flowmetry and computerized capillaroscopy.
• To assess peripheral vascular disorders using blackfoot disease and arteriosclerosis as models.
• To compare microcirculatory responses between these disease models and healthy controls.

Main Methods:

• Utilized laser Doppler flowmetry to measure blood flux in affected and non-affected digits.
• Employed computerized videophotometric capillaroscopy for nutritive microcirculation assessment.
• Evaluated post-occlusive reactive hyperemia (PRH) response in nailfold capillary loops after arterial occlusion.

Main Results:

• Laser Doppler flowmetry showed reduced blood flux in affected toes of blackfoot disease patients.
• Both blackfoot disease and arteriosclerosis groups exhibited lower blood flow than controls.
• Blackfoot disease patients demonstrated more significant disturbances in PRH parameters (rCBV, pCBV, time to pCBV) compared to arteriosclerosis patients.

Conclusions:

• Dynamic capillaroscopy provides a novel approach for early detection of circulatory disturbances.
• The study highlights differential microcirculatory mechanisms in peripheral vascular disorders.
• These techniques offer valuable insights into the pathophysiology of vascular diseases.