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Reduced Arteriovenous Shunting Capacity After Local Heating and Redistribution of Baseline Skin Blood Flow in Type 2 Diabetes Assessed With Velocity-Resolved Quantitative Laser Doppler Flowmetry
Linköping University, Department of Biomedical Engineering, Biomedical Instrumentation. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-3454-6576
Linköping University, Department of Biomedical Engineering, Biomedical Instrumentation. Linköping University, The Institute of Technology.ORCID iD: 0000-0001-6385-6760
Linköping University, Department of Medicine and Health Sciences, Internal Medicine . Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Centre for Medicine, Department of Endocrinology and Gastroenterology UHL.ORCID iD: 0000-0002-1680-1000
Linköping University, Department of Medicine and Health Sciences, Physiology . Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Heart Centre, Department of Thoracic and Vascular Surgery.ORCID iD: 0000-0002-9095-403X
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2010 (English)In: Diabetes, ISSN 0012-1797, E-ISSN 1939-327X, Vol. 59, no 7, 1578-1584 p.Article in journal (Refereed) Published
Abstract [en]

OBJECTIVE-To compare the microcirculatory velocity distribution in type 2 diabetic patients and nondiabetic control subjects at baseline and after local heating. RESEARCH DESIGN AND METHODS-The skin blood flow response to local heating (44 degrees C for 20 mm) was assessed in 28 diabetic patients and 29 control subjects using a new velocity-resolved quantitative laser Doppler flowmetry technique (qLDF). The qLDF estimates erythrocyte (RBC) perfusion (velocity X concentration), in a physiologically relevant unit (grams RBC per 100 g tissue X millimeters per second) in a fixed output volume, separated into three velocity regions: v less than1 mm/s, v 1-10 mm/s, and v greater than10 mm/s. RESULTS-The increased blood flow occurs in vessels with a velocity greater than1 mm/s. A significantly lower response in qLDF total perfusion was found in diabetic patients than in control subjects after heat provocation because of less high-velocity blood flow (v greater than10 mm/s). The RBC concentration in diabetic patients increased sevenfold for v between 1 and 10 mm/s, and 15-fold for v greater than10 mm/s, whereas no significant increase was found for v less than1 mm/s. The mean velocity increased from 0.94 to 7.3 mm/s in diabetic patients and from 0.83 to 9.7 mm/s in control subjects. CONCLUSIONS-The perfusion increase occurs in larger shunting vessels and not as an increase in capillary flow. Baseline diabetic patient data indicated a redistribution of flow to higher velocity regions, associated with longer duration of diabetes. A lower perfusion was associated with a higher BMI and a lower toe-to-brachial systolic blood pressure ratio.

Place, publisher, year, edition, pages
American Diabetes Association Inc / American Diabetes Association; 1999 , 2010. Vol. 59, no 7, 1578-1584 p.
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Engineering and Technology
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URN: urn:nbn:se:liu:diva-58196DOI: 10.2337/db10-0080ISI: 000279615100004OAI: oai:DiVA.org:liu-58196DiVA: diva2:342863
Note
This is an author-created, uncopyedited electronic version of an article accepted for publication in Diabetes. The American Diabetes Association (ADA), publisher of Diabetes, is not responsible for any errors or omissions in this version of the manuscript or any version derived from it by third parties. The definitive publisher-authenticated version is online at http://diabetes.diabetesjournals.org.: Ingemar Fredriksson, Marcus Larsson, Fredrik Nyström, Toste Länne, Carl Johan Östgren and Tomas Strömberg, Reduced Arteriovenous Shunting Capacity After Local Heating and Redistribution of Baseline Skin Blood Flow in Type 2 Diabetes Assessed With Velocity-Resolved Quantitative Laser Doppler Flowmetry, 2010, Diabetes, (59), 7, 1578-1584. http://dx.doi.org/10.2337/db10-0080 Copyright: American Diabetes Association Inc / American Diabetes Association; 1999 http://www.diabetes.org/ Available from: 2010-08-11 Created: 2010-08-09 Last updated: 2017-03-27

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Fredriksson, IngemarLarsson, MarcusNyström, FredrikLänne, TosteJohan Östgren, CarlStrömberg, Tomas

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Fredriksson, IngemarLarsson, MarcusNyström, FredrikLänne, TosteJohan Östgren, CarlStrömberg, Tomas
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Biomedical InstrumentationThe Institute of TechnologyInternal Medicine Faculty of Health SciencesDepartment of Endocrinology and Gastroenterology UHLPhysiology Department of Thoracic and Vascular SurgeryGeneral PracticePrimary Health Care Centre
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