Impaired peripheral vasomotion in diabetes

Area of Science:

• Vascular physiology
• Diabetic complications
• Neurovascular function

Background:

• Vasomotion, the rhythmic contraction of small arteries and arterioles, is crucial for microvascular blood flow regulation.
• Diabetes is associated with microvascular complications, but the impact on arterial vasomotion is not fully understood.

Purpose of the Study:

• To investigate whether vasomotion is impaired in individuals with diabetes compared to healthy controls.
• To explore the relationship between vasomotion abnormalities and neuropathy in diabetic patients.

Main Methods:

• Laser Doppler microvascular measurements were taken from the index finger pulpar surface in 20 diabetic and 20 healthy subjects.
• Fast Fourier transformation analyzed oscillations to determine vasomotion amplitude.
• Vasomotion amplitude was correlated with neuropathy measurements.

Main Results:

• Diabetic subjects exhibited significantly impaired low-frequency vasomotion (75% of patients, P < 0.0039).
• Mean vasomotion amplitude was substantially lower in diabetics (24.9 +/- 6.4) versus controls (129.0 +/- 33.2).
• Warm thermal sensory threshold was the only neuropathy variable significantly correlated with vasomotion amplitude (r = -0.75, P < 0.0009).

Conclusions:

• Peripheral vasomotion patterns are disordered in diabetes, indicating a vascular abnormality extending to arterial vessels.
• The observed loss of low-frequency oscillations suggests impaired microvascular function in diabetic peripheral vasculature.
• Measuring vasomotion may serve as a novel diagnostic tool for peripheral neurovascular function in diabetes.