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  • Title: Effects of a short-term improvement in glycaemic control on skin microvascular dysfunction in Type 1 and Type 2 diabetic patients.
    Author: Meyer MF, Rose CJ, Schatz H, Klein HH.
    Journal: Diabet Med; 2009 Sep; 26(9):880-6. PubMed ID: 19719708.
    Abstract:
    AIMS: To investigate whether Type 1 and Type 2 diabetic patients differ in the effects of short-term improvement in glycaemic control on skin microvascular dysfunction. METHODS: Fourteen Type 1 and 14 Type 2 diabetic patients admitted to hospital to improve glycaemic control were investigated. Two age- and sex-matched groups of non-diabetic subjects served as controls. Capillary blood cell velocity (CBV) was assessed at the dorsal middle phalangeal area of the ring finger at rest and after 3-min arterial occlusion using laser Doppler anemometry. RESULTS: Comparing the measurements before and after improvement in glycaemic control, there were no significant changes in peak CBV, time to peak CBV and vasomotion amplitudes in Type 1 and Type 2 diabetic patients. On admission to hospital, time to peak CBV was prolonged in Type 1 (20.9 +/- 2.9 vs. 12.3 +/- 1.6 s, P = 0.003) and Type 2 diabetic patients (20.6 +/- 2.6 vs. 11.9 +/- 1.3 s, P = 0.021) compared with control subjects. After improvement in glycaemic control, there was no significant difference in time to peak CBV between Type 1 diabetic patients and their control subjects (17.8 +/- 4.2 vs. 12.3 +/- 1.6 s, P = 0.535). In Type 2 diabetic patients, the time to peak CBV increased non-significantly. CONCLUSIONS: Short-term improvement in glycaemic control did not appear to reverse microcirculatory dysfunction in Type 1 and Type 2 diabetes. However, there was an improvement of the delayed reactive hyperaemia in Type 1 diabetic patients.
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