JOURNAL ARTICLE
OBSERVATIONAL STUDY
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A novel use of hill function and utility of 99mTc-MIBI scintigraphy to detect earlier lower extremity microvascular perfusion in patients with type 2 diabetes.

Medicine (Baltimore) 2017 September
We use the Hill function to analyze the dynamics of Tc-99m 2 methoxy-isobutyl-isonitrile (Tc-MIBI) scintigraphy data and to examine the earlier lower extremity microvascular perfusion of diabetic patients without typical clinical symptoms and with the preserved normal ankle-brachial index (ABI).Eighty-eight participants (30 healthy control, 34 diabetic patients, and 24 diabetic patients with peripheral arterial disease [PAD]) were recruited and applied Tc-MIBI scintigraphy. Fourteen diabetic patients with PAD also underwent computed tomography angiography (CTA) examination and were performed endovascular interventions.Diabetic patients with normal ABI already have significantly impaired maximum Tc-MIBI muscle perfusion counts (P < .001) and the peak times of the lower extremity muscle perfusion (P < .05). Tc-MIBI scintigraphy showed great consistent with ABI and CTA in detecting PAD. Tc-MIBI scintigraphy was also found to be effective in evaluating lower extremity circulation after endovascular interventions (P < .05).Hill function-based analysis of Tc-MIBI scintigraphy might be effective method to evaluate earlier lower extremity perfusion changes in diabetic patients.

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