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Reproducibility of Laser Doppler Flowmetry in gingival microcirculation. A study on six different protocols
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- Ajan, Aida (author)
- Linköpings universitet,Avdelningen för kirurgi, ortopedi och onkologi,Medicinska fakulteten,Region Östergötland, Käkkliniken US
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- Roberg, Karin (author)
- Linköpings universitet,Avdelningen för cellbiologi,Medicinska fakulteten,Region Östergötland, Öron- näsa- och halskliniken
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- Fredriksson, Ingemar (author)
- Linköpings universitet,Avdelningen för medicinsk teknik,Tekniska fakulteten
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- ACADEMIC PRESS INC ELSEVIER SCIENCE, 2024
- 2024
- English.
- In: Microvascular Research. - : ACADEMIC PRESS INC ELSEVIER SCIENCE. - 0026-2862 .- 1095-9319. ; 153
- Journal article (peer-reviewed)
Abstract
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- Objectives: Laser Doppler Flowmetry (LDF) is a non-invasive technique for the assessment of tissue blood flow, but increased reproducibility would facilitate longitudinal studies. The aim of the study was to assess the interday reproducibility of Laser Doppler Flowmetry (LDF) at rest, at elevated local temperatures, and with the use of the vasodilator Methyl Nicotinate (MN) in six interconnected protocols for the measurement of the blood supply to the microvascular bed of the gingiva. Methods: Ten healthy volunteers were included. Interweek LDF measurements with custom-made acrylic splints were performed. Six protocols were applied in separate regions of interest (ROI): 1; basal LDF, 2; LDF with thermoprobe 42 degrees C, 3; LDF with thermoprobe 45 degrees C, 4; LDF with thermoprobe 42 degrees C and MN, 5; LDF with thermoprobe 45 C and MN and 6; LDF with MN. Results: Intra-individual reproducibility was assessed by the within -subject coefficient of variation (wCV) and the intraclass correlation coefficient (ICC). Basal LDF measurements demonstrated high reproducibility with wCV 11.1 in 2 min and 10.3 in 5 min. ICC was 0.9 and 0.92. wCV after heat and MN was 4.9-10.3 and ICC 0.82-0.93. The topically applied MN yielded increased blood flow. Conclusion: This is the first study evaluating the reproducibility of basal LDF compared to single or multiple vasodilatory stimuli in gingiva. Multiple collector fibers probe and stabilizing acrylic splints are recommended. Vasodilatory stimulation showed a tendency toward higher reproducibility. Furthermore, MN yields vasodilation in gingiva.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk laboratorie- och mätteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Laboratory and Measurements Technologies (hsv//eng)
Keyword
- Laser Doppler Flowmetry; Microcirculation; Local heating; Thermoprobe; Methyl Nicotinate
Publication and Content Type
- ref (subject category)
- art (subject category)
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